he also swapped out the motor, im doubting it'd be his clutch, he says it wont pop wheelies, not that its slipping. im thinkin he needs a different gear ratio. maybe a slightly smaller pinion gear, or a slightly larger drive gear. My wording may be off, but thats what it sounds like he needs. basically smaller gear coming off the motor, larger gear on the axle, itll provide more torque because the motor will have to turn more times to make the axle turn once, thats an increase in torque for sure.