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Like most of you I love things that go, especially bikes and karts. I made this gearbox so I could use a Honda GX31 on my mountain bike and drive it through the gears. I've recently stripped it down after an extended testing period, it had no wear. I'm so pleased with it I thought I would show...

I made this a few years ago. It solves all the problems of mounting a powerhead to a bike or a kart. These little engines are getting better all the time, they run at any angle and have built in cooling. Search perrincycle for a little movie.