971589 – BikersHouse https://www.bikershouse.gr Performance Products - Customizing for Harley Davidson Wed, 24 Dec 2025 18:09:55 +0000 en-US hourly 1 https://wordpress.org/?v=7.1 https://www.bikershouse.gr/wp-content/uploads/2024/04/BH_logo_2048x2048_detailed_transparentcrop-100x100.png 971589 – BikersHouse https://www.bikershouse.gr 32 32 Samwel 3 to 4-speed conversion kit for 45″ Flathead https://www.bikershouse.gr/product/samwel-3-to-4-speed-conversion-kit-for-45-flathead/ Wed, 24 Dec 2025 18:06:33 +0000 https://www.bikershouse.gr/product/samwel-3-to-4-speed-conversion-kit-for-45-flathead/ Samwel3 to 4-speed conversion kit for 45″ Flathead  971589

fits  41-51 WL & 32-63 G Servi-Car (NU)

Will enable you to turn the stock 45″ 3-speed transmission into a 4-speed. 1, 2, 3 are smaller and 4th gear is identical to OEM ratio to get closer to the optimum RPM (Torque) at different speeds. Fits 3-speed 45″ (750cc) Side Valve models. 41-46 shift pattern. Can be used with later models when converted to footshift or the tankshift pattern is converted to 41-46 style. Note: The stock transmission side cover (kickstart cover) must be machined to accept the larger first (low) gear. Optionally a special 4-speed transmission side cover is separately available as 971591.

 

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Home > Parts > Drivetrain > Transmission > Transmission Housing Parts > Gears > 3 to 4-speed conversion kit for 45″ Flathead

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