Transmission / Gearbox tranny Do not even think about

Do not even think about putting anywhere close to 60 psi into the tires

make sure you look carefully inside the engine cavity to make sure there are no pieces of the clutch spring remaining

In most cases it is easier to simply use it with the inner tube

This will usually be 15-20 psi

The bike is not starting at all

Transmission / Gearbox tranny Do not even think aboutTransmission, or gear box for 40cc 4 stroke motors. Comes with the stock 11 tooth pinion gear attached. Typical symptoms that indicate a gearbox: Your bike started making a terrible rattling noise in the engine. Rear wheel is locked up, when pulling on the pull start the back wheel immediately starts spinning. To replace the gearbox, you have to remove the four screws that hold the transmission housing on to the engine. Use an 8mm socket wrench to