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Preface; I AM LOOKING FOR SOMEONE ELSES BUILD. I am not building this (yet). An old timer at the track told me that someone once built a 800 HP Hayabusa motor powered go kart with white trimming that ran low 8's in the quarter mile. The only information I found on it was a bad photo. Does anyone...

Hello y'all. Irresponsible Facebook Marketplace find here. I got a chinese pantora 150cc ATV with a CVT. I'm thinking of stretching the frame and lowering the seat, giving me a cart with independent front suspension and a suspended live axle in the rear, plus the powerful motor. Pictures to...

I have been given the opportunity to race a miata around Road atlanta. I daily a manual, so I know how to shift, but I've only ever raced DCTs. Are there/what are the things I need to know about racing a manual? Is there a different shifting method other than clutch in, shift to next gear, wait...

I have access to two running Kawasaki supersport jetskis. The hulls are toast, but the engines are fine. My rough plan is to fit the propellor shaft to a lawnmower rear diff, and fab up a frame around it. Other than retrofitting the cooling system to a radiator, what else do I need to look out...

Was fitting new Sprocket hub. Axle bearing is stuck on axle. Any tips for removal? I removed the set screws and tried torching, liberal amounts of penetrating oil, WD-40, CV axlepuller, sledge hammer and cold chisel. Any other ideas? I about to setup a press.

It seems to me that you could have a very energy-efficient car by have a small electric motor and a transmission. You wouldn't need to carry that huge motor coil for torque, just spin the motor to 28k rpm. Using a high amperage and a low voltage and gearing that up, you could have a much safer...

More of an opinion post, I want to hear what number of teeth yall have on your karts. Engine was originally from an ATV, with the 3 speeds being 0.65:1, 0.85:1,and 1:1 as best I can tell. PTO shaft sprocket is a 16 tooth, what number of teeth should I run on the rear axle? It is the same live...

I understand that the sprocket need to be concentric to the live axle on a kart. I previously posted this idea and was told it would not work because the sprocket would not be concentric. If I welded tabs to either side, then measured out the holes radial from the center of the axle, it should...

I am trying to replace a missing piston and connecting rod in a 80cc yz-80. However, I am poor and cannot afford the 300$ for a piston and connecting rod from Wossner Yamaha YZ80 1985-1987 – WOSSNER NA (wossnerpistons.com). Any tips on doing it cheaper? Should I just replace the engine? Or buy a...

I am mounting a chinese 110cc 3 speed single to a gokart chassis, and the stator cover interferes with the seat meaning the output sprocket of the engine is not able to be aligned with the normal key for the drive sprocket on the rear live axle. Ideas for solutions? I already thought about...

Is this the correct way to introduce myself?