Knucklehead
The Harley Davidson Knucklehead is a classic motorcycle engine that was produced from 1936 to 1947, and again from 1952 to 1957. It is known for its distinctive appearance, with its rocker boxes that resemble knuckles, and its unique sound. The Knucklehead was a significant improvement over the previous Harley Davidson engines, with its overhead valves and improved performance. It was also more reliable and easier to maintain. The Knucklehead was used in a variety of Harley Davidson motorcycles, including the EL, UL, and FL models. It was a popular engine with riders, and it helped to establish Harley Davidson...
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This manual covers Harley-Davidson Big Twin motorcycles from 1940 to 1947, encompassing both the iconic Knucklehead (E, F, EL, FL, FLH) and Flathead (U, UL, UH, ULH) engine variants. These models represent a significant era in American motorcycle engineering, known for their robust V-twin powerplants and distinctive styling. The Knucklehead, introduced in 1936, is celebrated for its unique valve cover design, while the enduring Flathead engine continued its legacy of reliable performance. These motorcycles are highly collectible and valued for their historical significance and engineering quality, offering a direct connection to the golden age of motorcycling.
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This workshop service repair manual provides comprehensive coverage for Harley-Davidson Big Twin motorcycles, including Knucklehead and Flathead engine models, from the 1940 through 1947 production years, with extended coverage for Big Twin models from 1937 onwards. These iconic V-Twin motorcycles, featuring robust construction and distinctive styling, represent a significant era in American motorcycle manufacturing. The manual details variations such as EL, FL, U, UL, and ULH models, covering their air-cooled OHV and side valve engines with displacements ranging from 61 to 80 cubic inches. It offers essential technical data for maintaining and repairing these vintage machines, ensuring their continued performance and reliability.
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This manual covers the 1940-1947 Harley-Davidson Big Twin motorcycles, encompassing both the innovative Knucklehead and the enduring Flathead engine variants. These iconic machines represent a significant era in American motorcycle engineering, known for their robust V-twin powerplants and distinctive styling. The Knucklehead, introduced in 1936, featured an overhead valve design, while the Flathead offered a reliable side-valve configuration. Both engine types, available in displacements such as 61 and 74 cubic inches, were engineered for performance and durability, making them highly sought after by collectors and enthusiasts alike.
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This workshop service repair manual covers Harley-Davidson Knucklehead and Flathead motorcycles produced between 1940 and 1947. These iconic V-twin machines represent a significant era in American motorcycle engineering, known for their robust construction and distinctive performance. The manual provides comprehensive information for maintaining and repairing these classic models, ensuring their continued operation and historical integrity.
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This manual covers Harley-Davidson Knucklehead motorcycles produced between 1940 and 1947, including models with engine designations E, F, FL, EL, U, UL, UH, and ULH. The Knucklehead is a significant model in Harley-Davidson's history, renowned for its V-twin engine design and its position as a benchmark in American motorcycle engineering during its era. These air-cooled machines, powered by overhead valve V-twin engines ranging from 61 to 74 cubic inches, offered substantial torque and performance for their time, competing with other prominent manufacturers and establishing a lasting legacy in the vintage motorcycle community.
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This manual covers Knucklehead and Flathead motorcycles produced between 1940 and 1947. These iconic V-twin machines, featuring both Overhead Valve (OHV) and Side Valve (SV) engine configurations, represent a significant era in American motorcycle engineering. The OHV models, including the 61 and 74 cubic inch variants (U and E models respectively), offered enhanced performance, while the robust 74 and 80 cubic inch Flathead (R and G models) provided dependable power. Known for their distinctive styling and enduring legacy, these motorcycles are celebrated by enthusiasts for their historical importance and raw mechanical character.
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This manual covers Big Twin motorcycles, specifically the Knucklehead and Flathead models produced between 1940 and 1947. These iconic V-twins represent a significant period in the brand's history, with the Knucklehead introducing overhead valve technology and improved performance over the preceding Flathead designs. Engineered for reliability and a distinctive riding experience, these motorcycles are highly valued by collectors and enthusiasts for their robust construction and historical significance. The manual details engine codes such as E, F, FL, U, UL, and ULH, catering to the specific configurations of these classic machines.
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This manual covers the Harley-Davidson EL "Knucklehead" motorcycle, produced between 1940 and 1947. The Knucklehead, a revolutionary design for its era, is celebrated for its integrated engine and transmission, and its distinctive rocker box shape. As an iconic American motorcycle, it represents a significant piece of automotive history, known for its powerful V-twin engine and robust construction. This guide is intended for owners, restorers, and mechanics who wish to maintain and repair this classic machine, ensuring its authenticity and optimal performance.
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This manual covers the Harley-Davidson Big Twins, including Knucklehead and Flathead models, produced between 1940 and 1947. These iconic motorcycles, featuring engine displacements of 61, 74, and 80 cubic inches, represent a significant era in American motorcycling. The Knucklehead, introduced in 1936, and the concurrent Flathead Big Twins (U-series) are celebrated for their robust engineering and distinctive V-twin configurations. This manual is tailored for owners and restorers of these vintage machines, providing the essential factory-level information needed to maintain their historical integrity and performance.
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This manual provides comprehensive coverage for Harley-Davidson Big Twin motorcycles, specifically the Knucklehead and Flathead models manufactured between 1940 and 1947. These iconic machines, powered by the legendary Knucklehead (E, EL, F, FL, U, UL, ULH, UH, UA) and Flathead (R, W, WL, WLD) V-twin engines, represent a significant era in American motorcycle engineering. Renowned for their robust construction and distinctive styling, these Big Twins are celebrated for their enduring performance and classic appeal. This factory service repair workshop manual is an essential resource for maintaining the integrity and operational excellence of these vintage motorcycles.
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This manual covers Harley-Davidson Big Twin motorcycles, specifically models equipped with Knucklehead and Flathead engines, produced between 1940 and 1947. These iconic V-twin motorcycles represent a significant era in American motorcycling history, known for their robust engineering and distinctive designs. The Knucklehead, introduced in 1936, featured an overhead valve design, while the Flathead, an older but reliable side-valve engine, remained a popular choice. This period also saw Harley-Davidson's contribution to the war effort, influencing civilian production. These machines, often featuring displacements of 61 or 74 cubic inches, are highly sought-after collector items, valued for their historical importance and mechanical character.
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This manual covers Big Twins, specifically the Knucklehead and Flathead models, produced between 1940 and 1947. These iconic V-twin motorcycles, manufactured in Milwaukee, Wisconsin, are renowned for their robust engineering and distinctive styling. The Knucklehead, introduced in 1936, featured an overhead valve design, while the Flathead, a side-valve engine, offered reliable performance and was widely used, including in military WLA variants. This period represents a significant era for the brand, with models like the EL, FL, U, UL, and WLA forming the backbone of their offerings.
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This manual covers Big Twin motorcycles equipped with either the Knucklehead (OHV) or Flathead (SV) engines, manufactured between 1940 and 1947. These iconic motorcycles, produced in Milwaukee, Wisconsin, represent a significant era in American motorcycling. Known for their robust engineering and distinctive designs, the Knucklehead and Flathead models have earned a revered place in automotive history and remain highly sought after by enthusiasts and collectors. This documentation provides comprehensive technical information essential for understanding, maintaining, and restoring these classic machines.
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The Harley-Davidson EL "Knucklehead," produced from 1940 to 1947, stands as a significant milestone in American motorcycle engineering. Renowned for its distinctive overhead valve V-twin engine, featuring unique rocker box covers that earned it the "Knucklehead" moniker, this model offered a powerful and reliable riding experience for its era. Available in 61 cubic inch (EL) and 74 cubic inch (FL) displacements, these motorcycles were designed for both performance and durability, setting benchmarks against competitors and becoming highly collectible machines. The robust construction and iconic styling cemented the Knucklehead's place in motorcycling history.
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The 1940 Harley-Davidson EL \"Knucklehead\" represents a significant milestone in American motorcycle engineering, known for its robust V-twin engine and iconic design. This model, produced by Harley-Davidson in Milwaukee, Wisconsin, features a 61 cubic inch overhead valve engine, a 3-speed constant mesh transmission, and a total loss lubrication system. Its revolutionary design for its era emphasized performance and reliability, making it a highly sought-after machine for riders and collectors alike. The EL \"Knucklehead\" is celebrated for its distinctive styling and the powerful riding experience it offers, cementing its status as an enduring classic.
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This manual covers the Harley Davidson Knucklehead 1940, a renowned motorcycle celebrated for its robust engineering and iconic design. Specifically tailored for the 1940 model year, this comprehensive guide provides in-depth information essential for the upkeep and restoration of this classic machine. Its legendary status is built on a foundation of reliability and performance, making it a sought-after vehicle for enthusiasts and collectors alike.
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This manual covers the 1940 Harley-Davidson E \"Knucklehead\" motorcycle, a significant model in American motorcycle history. Known for its iconic design and the distinctive knuckle-like rocker boxes, the E model, featuring a 61 cubic inch (1000cc) overhead valve V-twin engine, represents a pinnacle of engineering from its era. Produced in Milwaukee, Wisconsin, Harley-Davidson motorcycles of this period are celebrated for their robust construction and enduring legacy, making the Knucklehead a highly collectible and sought-after machine for enthusiasts and collectors alike.
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This manual provides comprehensive service and repair information for the Harley-Davidson Knucklehead motorcycles produced between 1940 and 1947. The Knucklehead, a significant model in Harley-Davidson's history, is renowned for its innovative recirculating oil system and distinctive valve cover design. These iconic V-twin motorcycles, manufactured in Milwaukee, Wisconsin, are characterized by their robust engineering and enduring performance, making them highly sought after by enthusiasts and collectors. This guide is an essential resource for maintaining and restoring these classic machines, offering deep insights into their intricate design and operational nuances.
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The Knucklehead, produced from 1940 to 1947, represents a pivotal era in American motorcycle engineering. Available in EL (74 cu in) and FL (80 cu in) variants, these motorcycles are powered by a robust Overhead Valve V-Twin engine, a design that earned the model its distinctive nickname from the shape of its rocker box covers. The Knucklehead succeeded the Flathead series, marking a significant advancement in performance and styling for a brand with a heritage dating back to 1903. These iconic machines are celebrated for their powerful engines and enduring legacy, making them highly sought after by collectors and enthusiasts.
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This manual covers the motorcycle produced between 1940 and 1947. The Knucklehead is renowned for its revolutionary design, featuring distinctive overhead valve rocker boxes and a robust V-twin engine available in 61 cubic inch (E series) and 74 cubic inch (F series) displacements. This iconic American motorcycle represents a significant era in engineering heritage, known for its powerful performance and distinct styling. Its construction emphasizes mechanical purity and rider connection, making it a highly collectible and historically important machine for enthusiasts and restorers.
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This manual covers the Harley-Davidson EL/FL Knucklehead models produced between 1940 and 1947. These iconic motorcycles, powered by a 45-degree V-Twin OHV engine available in 74 or 80 cubic inch displacements, represent a significant period in American motorcycle engineering. Known for their distinctive 'knuckle-like' rocker boxes, these machines offered robust performance and a unique riding experience, establishing Harley-Davidson's legacy. Whether you own an EL or an FL, this guide is an essential resource for understanding and maintaining these classic V-twins.
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This manual covers the EL and FL "Knucklehead" motorcycles, specifically the Second Generation (E/F Series) produced between 1940 and 1947. Known for their distinctive valve cover shape, these V-twin motorcycles represent a significant era in American motorcycling. The EL model features a 61 cubic inch engine, while the FL model is equipped with a 74 cubic inch engine. Both variants utilize a 4-speed manual transmission and are celebrated for their robust engineering and iconic design, making them highly sought after by enthusiasts and collectors.
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This manual covers the HARLEY DAVIDSON KNUCKLEHEAD, produced for the model years 1940 through 1947. Designed for enthusiasts and professionals alike, this vehicle represents a significant piece of engineering history. Its robust construction and iconic design have made it a sought-after model for collectors and riders. This service manual provides comprehensive information to ensure the continued performance and longevity of your HARLEY DAVIDSON KNUCKLEHEAD.
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This manual covers EL "Knucklehead" motorcycles produced between 1940 and 1947, encompassing all styles. The EL Knucklehead is a highly iconic 45-degree V-twin motorcycle, renowned for its distinctive engine design and its significant place in history. These machines, featuring a 61 cubic inch (1000cc) engine, represent a benchmark in V-twin engineering from their era, offering a robust and powerful riding experience that continues to be revered by enthusiasts and collectors. Their legacy is built on durable construction and a classic aesthetic, making them a cornerstone of motorcycle heritage.
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This manual covers the Harley-Davidson EL / FL "Knucklehead" models produced from 1940 through 1947. Known for their distinctive valve train architecture and robust V-twin engines, these motorcycles represent a significant era in American motorcycling. The Knucklehead series is celebrated for its engineering quality and has become a highly collectible icon among enthusiasts. This workshop service repair manual provides comprehensive information for maintaining and repairing these classic machines.
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This workshop service repair manual covers Knucklehead EL/FL Series motorcycles produced between 1940 and 1947. These iconic V-Twin OHV motorcycles are celebrated for their distinctive engineering and historical significance in the evolution of American motorcycling. Known for their robust construction and performance for their era, the Knucklehead models, including engine codes E, F, and U, represent a pivotal period in legacy, offering a unique riding experience and high collector value.
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This workshop service repair manual provides comprehensive coverage for the EL "Knucklehead" motorcycle, produced between 1940 and 1947. The Knucklehead, a significant engineering advancement, is renowned for its iconic V-twin, air-cooled, OHV engine, available in 61 cubic inch (EL) and 74 cubic inch (FL) displacements. This manual is designed for do-it-yourself enthusiasts and experienced mechanics, offering detailed information to maintain and repair these classic machines, which were produced even through wartime.
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The Harley-Davidson Knucklehead, covering EL and FL models from 1940 to 1947, represents a significant era in American motorcycle engineering. These iconic machines, powered by 45-degree V-twin engines with displacements of 61 cubic inches (EL) and 74 cubic inches (FL), are renowned for their distinctive overhead valve design and robust construction. The Knucklehead's legacy is built on its powerful performance and unique styling, making it a highly collectible and sought-after motorcycle for enthusiasts and collectors alike. This manual provides essential information for the care and maintenance of these historically important vehicles.
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This manual provides comprehensive service and repair information for the 1941 Harley Davidson Knucklehead. Renowned for its robust engineering and iconic design, the Knucklehead represents a significant era in motorcycle history. This guide is intended to assist owners and technicians in understanding and maintaining the intricate systems of this classic machine, ensuring its continued performance and longevity.
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This manual covers the Harley-Davidson EL (Knucklehead) motorcycle from 1941. The EL model, a significant part of Harley-Davidson's iconic Knucklehead series produced from 1936 to 1947, is powered by a 61 cubic inch (1000cc) air-cooled OHV V-twin engine. Known for its distinctive valve covers, this vintage motorcycle represents a key era in American motorcycle engineering. It features a 4-speed manual transmission, dry multi-plate clutch, and drum brakes. The 1941 EL benefits from refinements made during the Knucklehead's development and is a highly sought-after machine by collectors and enthusiasts.
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This manual covers the 1941 Harley-Davidson EL "Knucklehead," an iconic V-twin motorcycle renowned for its distinctive valve covers and robust engineering. As a significant evolution of the original Knucklehead design, the 1941 model embodies Harley-Davidson's heritage of performance and reliability. This air-cooled, overhead valve machine, featuring a 74 cubic inch displacement, was built for riders who appreciated classic American craftsmanship and the open road. Its engineering quality and historical significance make it a highly collectible and cherished piece of motorcycle history.
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This manual covers the Harley-Davidson E / F (Knucklehead) series motorcycles produced in 1942. These iconic machines, powered by the U / UL (Big Twin OHV) engine family, represent a significant era in American motorcycle engineering. Known for their distinctive rocker box covers, the Knucklehead models were built with a focus on robust construction and reliable performance, establishing Harley-Davidson's reputation for durable, powerful V-twin motorcycles. The 1942 models, in particular, are a key part of this legendary design's evolution.
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This manual provides comprehensive repair and maintenance information for the 1942 Harley Davidson Knucklehead. Engineered for reliability and performance, this iconic motorcycle represents a significant era in American motorcycling. Its robust design and distinctive features have made it a sought-after machine for enthusiasts and collectors alike, demanding meticulous care to preserve its legacy.
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This manual covers the Harley-Davidson E/F/EL/FL Knucklehead models produced in 1942, representing the second generation of this iconic V-Twin OHV motorcycle. Known for its distinctive rocker box design, the Knucklehead was a significant advancement in motorcycle engineering, offering robust performance and reliability for its era. These models, available in 61 cubic inch (E) and 74 cubic inch (F) displacements, feature a 4-speed hand-shift transmission with a foot clutch, internal expanding drum brakes, and a springer front fork. The 1942 production year marks a significant point in the model's history, continuing its legacy as a pinnacle of American motorcycle design before wartime production shifts.
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This manual covers the 1943 Harley-Davidson E/EL/F/FL Knucklehead models, featuring the iconic F-head engine. Known for its robust engineering and significant advancements in motorcycle performance for its time, the Knucklehead represents a pivotal era in Harley-Davidson's rich heritage. Its distinctive design and powerful V-twin engine have cemented its status as a highly collectible and historically significant motorcycle, embodying the brand's legacy of quality and reliability.
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This manual covers the 1943 Harley-Davidson EL \"Knucklehead\" motorcycle, a significant model from the brand's esteemed history. Powered by an OHV V-Twin engine, this second-generation Knucklehead features a 61 cubic inch (1000cc) displacement and is recognized for its robust engineering and iconic design. Produced during a period of wartime, this motorcycle represents a mature iteration of Harley-Davidson's premium overhead-valve offerings, known for its distinctive valve cover shape and reliable performance.
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This manual provides comprehensive technical documentation for the 1943 Harley-Davidson EL/FL \"Knucklehead\" motorcycle. Known for its distinctive V-Twin OHV engine, the Knucklehead represents a significant era in American motorcycle engineering, offering robust performance and iconic styling. This model, produced during wartime, reflects Harley-Davidson's heritage of building durable and reliable machines. The EL variant features a 74 cubic inch engine, while the FL boasts an 80 cubic inch displacement, both renowned for their engineering quality and the unique character that has made them highly sought after by collectors and enthusiasts.
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This service repair manual covers the Harley-Davidson E, F, and FL models from 1944, featuring the iconic OHV V-twin engine. These motorcycles are renowned for their robust engineering and historical significance, representing a pivotal era in American motorcycling. The 1944 model year, in particular, saw adaptations for military use, adding to its unique heritage. This manual is an essential resource for owners and enthusiasts seeking to understand, maintain, and restore these classic machines, highlighting their legendary reliability and distinctive design.
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This manual covers the Harley-Davidson E and F Series Knucklehead motorcycles produced from 1936 to 1947, with specific focus on the 1944 models. Known for their distinctive cast aluminum cylinder heads, these V-twin motorcycles represent a significant era in American motorcycling. The EL models feature a 61 cubic inch engine, while the FL models are equipped with a larger 74 cubic inch engine. These machines are celebrated for their robust engineering and have achieved iconic status among collectors and enthusiasts, embodying a rich heritage of American craftsmanship and performance.
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The 1944 Harley-Davidson Knucklehead is an iconic American motorcycle, celebrated for its powerful Overhead Valve (OHV) V-twin engine and robust construction. This model represents a significant milestone in Harley-Davidson's engineering heritage, offering enhanced performance and reliability that set it apart from its contemporaries. Revered by enthusiasts and collectors alike, the Knucklehead is a testament to the brand's commitment to innovation and enduring quality, making it a highly sought-after machine for its historical significance and distinctive riding experience.
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The 1945 Harley-Davidson EL "Knucklehead" represents a significant chapter in American motorcycle history. As a Second Generation Knucklehead, this model embodies the robust V-twin engine design and iconic styling that defined an era. Known for its distinctive rocker boxes, the Knucklehead offered a blend of power, comfort, and touring capability, competing with other large-displacement V-twins of its time. Its engineering quality and reliability have made it a highly collectible and influential motorcycle, continuing to inspire designs today.
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This manual covers the 1945 EL \"Knucklehead\" motorcycle, a significant model in American motorcycle history. Known for its iconic V-twin engine, the EL variant features a 61 cubic inch (1000cc) displacement and an air-cooled OHV design, often referred to as F-head due to its distinctive valve covers. This model represents a period of innovation, characterized by robust engineering and a unique aesthetic that continues to be highly valued by collectors. The Knucklehead's legacy is one of performance and enduring style, making it a benchmark for vintage motorcycle enthusiasts.
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This manual provides comprehensive guidance for the Harley Davidson Knucklehead 1945. Engineered for reliability and performance, the Knucklehead is renowned for its distinctive design and robust construction, making it a sought-after model for enthusiasts and collectors alike. This guide is tailored to assist owners and technicians in understanding and maintaining this iconic motorcycle, ensuring its continued operational excellence.
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This manual covers the Harley-Davidson E/F/FL Series (Knucklehead) motorcycle, specifically the 1946 model year, representing the Second Generation Knucklehead. These iconic V-twin OHV motorcycles, known for their distinctive engine design, were manufactured in Milwaukee, Wisconsin, and are celebrated for their engineering quality and historical significance. The 1946 models, returning to civilian production after World War II, featured a 45-degree V-twin engine with a displacement of 61 cubic inches (1000cc) for EL models and potentially larger for FL variants, paired with a 4-speed constant mesh transmission and a wet multi-plate clutch. Their robust construction and classic styling have made them highly collectible vintage machines, valued by owners and enthusiasts alike.
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This manual covers the 1946 Harley-Davidson EL/FL Knucklehead, a legendary motorcycle powered by an air-cooled, 45-degree V-twin engine displacing 74 cubic inches. Known for its robust engineering and iconic design, the Knucklehead represents a significant era in American motorcycling. Its OHV valve train and 4-speed constant mesh transmission, coupled with a dry multi-plate clutch, deliver a distinctive riding experience. This model, produced between 1936 and 1947, is highly sought after by collectors and enthusiasts, embodying the heritage and craftsmanship of the Harley-Davidson Motor Company.
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This manual covers the 1946 Harley-Davidson EL "Knucklehead" cruiser motorcycle. Known for its iconic OHV V-Twin engine, this model represents a significant piece of American motorcycling history, offering a blend of classic design and robust engineering. The Knucklehead, produced from 1936 to 1947, was a pivotal development for Harley-Davidson, distinguished by its distinctive rocker boxes. The 1946 model specifically marks the brand's return to civilian production following World War II, making it a highly sought-after machine for enthusiasts and collectors.
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This manual covers the 1947 Harley-Davidson EL (Knucklehead) motorcycle, a significant model from the legendary Knucklehead Series produced between 1936 and 1947. Known for its distinctive rocker box design and powerful 74 cubic inch (1200cc) OHV V-twin engine, the Knucklehead represents a pinnacle of American motorcycle engineering for its era. This model is celebrated for its robust construction, iconic styling, and enduring appeal to enthusiasts and collectors. Its design prioritizes performance and a classic riding experience, making it a highly sought-after machine for both its historical significance and its capabilities on the road.
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This manual covers the 1947 Harley-Davidson EL "Knucklehead," a landmark motorcycle renowned for its distinctive overhead-valve V-twin engine and robust engineering. Produced during the final year of its iconic run, the EL model, featuring a 61 cubic inch (1000 cc) displacement, represented a pinnacle of performance and design for its era. As Harley-Davidson's flagship model from 1936, the Knucklehead was celebrated for its power, durability, and the unique aesthetic of its rocker box covers, solidifying its status as a highly collectible and historically significant American motorcycle.
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This manual provides comprehensive guidance for the Harley Davidson Knucklehead 1947. Designed with both professional technicians and do-it-yourself mechanics in mind, it covers essential repair and maintenance procedures. The Harley Davidson Knucklehead 1947 is renowned for its engineering quality and reliability, and this manual aims to help owners preserve these attributes.
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This manual covers Knucklehead and Flathead motorcycles produced between 1937 and 1947. These iconic models, featuring overhead valve Knucklehead and side valve Flathead engines with displacements ranging from 61 to 80 cubic inches, represent a significant era in American motorcycle engineering. Known for their robust construction and class-leading power delivery for their time, these motorcycles are highly sought after by collectors and enthusiasts. This manual serves as an essential resource for understanding and maintaining these historically significant machines.
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This manual covers the Harley-Davidson Knucklehead Flathead V-Twin Cruiser motorcycles produced between 1940 and 1947. Renowned for its iconic design and powerful V-twin engine, the Knucklehead represents a significant era in American motorcycling. Its robust engineering and distinctive styling have made it a highly sought-after machine for collectors and enthusiasts alike. This guide is dedicated to providing comprehensive information to ensure the optimal performance and longevity of these classic motorcycles.
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This manual covers the Harley-Davidson Knucklehead, specifically the EL (61 cu in) and FL (74 cu in) models produced between 1940 and 1947. Renowned for its iconic design and robust V-twin engine, the Knucklehead represents a significant period in Harley-Davidson's engineering legacy. Its development marked advancements in engine lubrication and frame geometry, establishing a benchmark for performance and styling that continues to be celebrated by enthusiasts and collectors alike.
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This manual covers the Harley-Davidson EL and FL "Knucklehead" models produced between 1940 and 1947. These iconic motorcycles represent a significant era in American V-twin engineering, known for their robust construction and distinctive overhead valve design. The EL model features a 61 cubic inch (1000cc) engine, while the FL is equipped with the larger 74 cubic inch (1200cc) displacement. Revered by collectors and enthusiasts, the Knucklehead series is celebrated for its historical importance and enduring appeal.
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This manual covers the motorcycle, produced between 1940 and 1947. Renowned for its robust V-twin engine, this iconic machine represents a significant era in American motorcycle engineering. The Knucklehead, along with related Flathead models of the period, is celebrated for its distinctive design, powerful performance, and enduring legacy, making it a highly sought-after model for collectors and enthusiasts. Its mechanical integrity and the characteristic rumble of its engine are hallmarks of its historical importance and engineering quality.
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This manual covers the Knucklehead Flathead motorcycles, including EL, FL, U, and UL models, produced between 1940 and 1947. These iconic V-twin motorcycles, powered by 61ci (EL) or 74ci (E, F, FL, U, UL) overhead valve engines, are celebrated for their robust engineering and distinctive design. Known for their torque-focused performance and reliability, the Knucklehead series represents a significant era in motorcycle history, preceding the Panhead models. This resource is essential for owners and restorers seeking to maintain or rebuild these highly collectible machines, offering comprehensive details that surpass generic workshop guides.
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This manual provides comprehensive coverage for the EL "Knucklehead" Flathead V-Twin motorcycles produced between 1940 and 1947. This iconic era of engineering is characterized by its robust V-twin engine, distinctive styling, and historical significance, including influences from military specifications of the period. These motorcycles, often featuring 61 or 74 cubic inch displacements, were built with a focus on durability and performance, making them highly sought after by enthusiasts and collectors. The manual details variations common to civilian models, offering a deep dive into the mechanical and electrical systems that defined these classic machines.
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This manual provides comprehensive service and repair information for the Knucklehead motorcycle, covering model years 1940 through 1947. Renowned for its distinctive overhead valve (OHV) or flathead V-twin engine design, the Knucklehead represents a significant era in American motorcycle engineering. These iconic machines, available in various engine configurations including the 61 cubic inch (1000cc) and 74 cubic inch (1200cc) variants, are celebrated for their robust construction and historical importance. This manual is an essential resource for owners and enthusiasts dedicated to maintaining, restoring, or rebuilding these classic models, ensuring their continued performance and heritage.
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This manual covers Knucklehead motorcycles produced between 1940 and 1947. The Knucklehead, a revolutionary design for its time, introduced the iconic Overhead Valve (OHV) V-twin engine architecture that would define the brand for decades. Known for its robust steel frame and air-cooled, V-twin engine, typically available in 61 and 74 cubic inch displacements, these motorcycles represent a significant milestone in American engineering. This workshop service repair manual is designed for all models within these production years, offering comprehensive information for owners, restorers, mechanics, and enthusiasts.
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This manual covers the Knucklehead FL models produced between 1940 and 1947. The Knucklehead, a pivotal model in history, is renowned for its iconic overhead valve (OHV) Flathead V-twin engine, available in 61 and 74 cubic inch displacements. Its distinctive rocker box covers earned it the nickname "Knucklehead." This era of motorcycles represents a significant advancement in design and performance, offering a powerful riding experience characterized by robust engineering and a unique aesthetic that continues to be revered by enthusiasts.
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The Knucklehead, produced from 1936 to 1947, represents a significant milestone in the evolution of American V-twin motorcycles. Known for its innovative overhead valve design, which succeeded the earlier Flathead models, the Knucklehead offered enhanced performance and reliability. Available with engine displacements of 61, 74, and 80 cubic inches, these motorcycles were engineered with robust construction and a distinctive aesthetic, making them highly sought after by riders and collectors alike. This era of motorcycles is celebrated for its foundational contributions to the brand's legacy of powerful, American-made machines.
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This manual covers Harley-Davidson Knucklehead and Flathead Big Twin models produced between 1940 and 1947. These iconic motorcycles, powered by the OHV Knucklehead or the Side Valve Flathead engines, represent a significant era in American motorcycling. Known for their robust engineering and distinctive V-twin configurations, these bikes were built for performance and durability, establishing Harley-Davidson's legendary status. This guide is intended for owners and enthusiasts seeking to maintain, repair, or restore these classic machines.
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This Service Repair Manual covers Harley-Davidson Knucklehead and Flathead motorcycles produced between 1940 and 1947, including models with E, F, FL, U, and UL engine codes. These iconic V-twin motorcycles, featuring both Overhead Valve (OHV) and Side Valve configurations with displacements ranging from 1000 c.c. (61 Cu. In.) to 1300 c.c. (80 Cu. In.), are renowned for their historical significance and robust engineering. The manual provides comprehensive information for maintaining and repairing these legendary machines, emphasizing their mechanical integrity and rider-focused design, which were hallmarks of Harley-Davidson's heritage during this era.
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This manual covers the Harley-Davidson E / EL (Knucklehead) motorcycles produced between 1940 and 1947. These models represent the second generation of the iconic Knucklehead design, known for its distinctive OHV V-Twin engine. The E model is equipped with a 61 cubic inch engine, while the EL model features a larger 74 cubic inch engine. These motorcycles, with their robust engineering and unique aesthetic, are celebrated for their historical significance and enduring appeal among enthusiasts.
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This manual covers the Harley-Davidson EL Knucklehead, produced between 1936 and 1947. This iconic motorcycle is renowned for its pioneering overhead valve V-twin engine, which gave it its distinctive name due to the shape of the rocker boxes. Representing a significant advancement in Harley-Davidson's engineering, the Knucklehead was available in 61 cubic inch (EL) and 74 cubic inch (FL) displacements, offering robust performance and a unique riding experience that has cemented its status as a classic American machine. Its design and engineering quality from this era set a benchmark for the brand.
