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4-Speed Transmission For Harley-Davidson 45" Flathead 1941-1964
4-Speed Transmission For Harley-Davidson 45" Flathead 1941-1964
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$2,040.96 USD
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$2,040.96 USD
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- This 4-speed gearbox transmission assembly comes completely assembled with all gears, shaft and covers installed for a quick, straight- forward installation
- It accepts original primary drive with clutch and the chain sprocket with cover
- Looks the same as a 3-speed unit, the only extra part required is a 4 speed shifter gate
- The original 3 speed transmission is the large gear ratio difference between 1st and 2nd, i.e. from 2.47 to 1.57:1 with a consequent big rpm drop
- The 4 speed version with its extra gear allows you to stay in the power band much better for performance
- Includes a parkerized sprocket cover with arm, black solo kick start arm, black pedal assembly, clutch hub without rollers and a 17 tooth countershaft sprocket
- 4-Speed Gear Ratios: 1st - 2.67:1, 2nd - 2.03:1, 3rd - 1.42:1, 4th - 1:1
- The shift pattern follows: 1st gear is forward, neutral, 3rd and 4th gear are back towards rider as seated on motorcycle
- Shift pattern uses 4-speed gate and rod with clevis
- Shift lever all the way to the rear, ball detent in first gear pocket for lever position during assembly
- Lever all the way towards the rear is first gear
- The 4-speed tank shift gate is available separately for the early cateye tanks, or the late tanks of 1948-1973
- 4 speed transmission door must be milled to accept 17 tooth sprocket
- Fits:
- G 1947-1964
- W 1941-1952
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