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Hi all, Have fittted a huasheng 4 stroke kit, I think its a f142 model, as it has a freewheel sprocket, I assembled the bike on a stand so the rear wheel is off the ground. I can hold the rear wheel while increasing the revs, the clutch throws but resistance is very poor, riding the bike would be impossible as the clutch would be slipping all the time. is there a solution to this problem.?