I bought a motorized bike for $50 and I knew it had some problems but it looked cool to fool with. Never had a motorize bike so I'm just winging it. I have a 4 stroke 49cc Chinese Honda knock off motor. Centrifugal clutch. Problem is I don't know how the clutch should be working? I can idle the motor and the bike will push a little bit forward. I can stand it up against something and the bike won't move by it's self. Should that be happening or should I not feel any push at all from the engine at idle? The brass bushing was seized in the clutch bell when I got the bike so I banged it out, polished it, greased it and reinstalled. With the belt off I can idle the engine and hold the clutch bell stationary. Not sure if I need a new bushing or that's how these clutches work? BTW this bike needed some help. Fuel line was shot and leaked, kill switch didn't work because the on/off switch didn't work so I bypassed the switch. Went to set the idle and the top of the nylon screw came off and to finish it off I had a pedal fall off when I was riding the bike. No idea if there was a nut on the pedal or it some how fell off while I was riding it. LOL. I think the pedal was just hammered on.