take 2 regular engine shifters, remove the rubber from the 90* arms and weld them together 180* apart. the little you pull with the new shift arms will translate to a lot at the old shift arms on the engine. simple machines like levers allow you to multiply the force. if in your car/truck you have a short shifter arm, you will need to jam the shifter to change gears. if you have a longer shift arm, you need less power and more movement. to reduce the amount of movement, you get a short throw kit. you can hand shift a motorcycle engine easier with your hand than your foot. the throw involved at the engine from a regular foot shifter is maybe a half inch per gear, with a total throw range of say 3". when looking at a shifter in the various gears, the shifter seems to stay in the same place reguardless of gear. you could probably mount bicycle brake levers and perches onto your steering wheel and work fine. my reasoning, look at a manual clutch: lever operated, connected via cable to another lever. manipulating the clutch on a bike can be more stressful than hand shifting. the lever at the perch may be long, but moves little. the arm at the clutch is usually shorter; with exception. the shorter the arm at the clutch the more pull is needed.
? Let me know what your think.
