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I've built a couple off-road karts, but never a minibike. While toying with the idea, I remembered I have a complete '81 Honda XR200R (4-stroke) with a buggered engine. Would it be reasonable to consider mating a Predator 212cc engine to the motorcycle? The upsides are the bike is complete...

I'm mocking up my drivetrain and the way this frame was built I'm limited on space. Maybe the 13hp engine has something to do with that, too. Whatever. After trying out a couple different arrangements, this is what I've come up with. Do you see any glaring problems or things I could to do...

I understand how to calculate gear ratios and how they affect a kart, but how does a torque converter play into the effective gearing? Also, would a Comet 40-series TC be a good choice for my setup? My kart's specs: 550 lb with driver 13 hp Grayhound (Honda clone) Live axle 17.5" diameter rear...

Is a torque converter pretty much a necessity with a 13hp engine in a heavy kart? I'm estimating 300lb with engine. Anyone ever use this one? Any opinions on it? http://www.bulletlines.com/GTC-TC2-1-Bore-Torque-Converter-p/54.htm

I've found a Comet centrifugal clutch with a 1" bore that should work on my 13hp clone with #40 chain, but I also read on GoKartSupply that you shouldn't use a centrifugal clutch on anything over a certain HP level, I think it was 8hp or something. Are they just looking for more sales and I can...

I just obtained a kart that's nearly a complete roller for $50. However, some parts are still needed, including an engine and clutch (and seat, chain, brakes, brake linkage...). I'm looking for some ballpark recommendations so I can narrow my research before I start working on it. I promised...