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I have a go kart that is fairly big. Two adults can sit in it with a little squeeze. I'm replacing the power plant in it, was a 150cc motor and integral gear reduction and torque convertor. Lets say the kart with a rider(s) weighs 800 lbs to be safe. Power plant will be a tuned up GX390...

Every where I have read about drilling main jets has said get a numbered set from 60 to 81 or some where in that neighborhood. Here is an easy way to get those bits locally (normally). Go buy a Oxy-Acetylene tip drill bit kit. This kit comes with a small pin vise and bits from 52 to 74...

I've had a little go kart project going on for a while LINK and I've got all the frame work like I want it so now its time to tweak the engine and see what kinda of power we can get out of it. This thread is about building up the exhaust to allow some free flow of exhaust. Everyone says the...

So this project started out with a friend of a friend that had a chinese gokart with a bad engine and some missing parts. So the initial investment was $50. But it had rear swing arm, rack and pinion steering, headlights, horn, independent front suspension. So over all a pretty good go kart. So...