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Old 03-10-2011, 04:05 AM
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primusbike primusbike is offline
Motorized Bicycle Newbie
Join Date: Mar 2011
Location: nys
Posts: 16
Default Building 4stoke shift kit

First off, hello. This forum keeps popping up in search results and have read some great stuff here. I have built 2 gas powered bikes. The first using a golden eagle plastic ring and completely custom engine mount. The second, current bike I have now, is a kit from Rear axle mounted 33cc subaru engine.

I want speeds. I also hate the reliability of gear clusters and derailers! My plan for providing gears is to buy an expensive 8 speed internally geared rear hub. I have seen the shift kit from sickbikes and that would be base for my next bike. Im going with the honda ghx50 for an engine.

Okay, now here where I NEED HELP.

The gears (gearbox) that initially reduces the speed of the engine. In the pictures of the shift kit installed with a 4 stroke engine, the engine has a "complete stage III" gearbox.

question, what gear ratio is that providing?

Can I use the 5:1 ratio belt transmission from bicycle with the shift kit?
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