Trouble Shooting

Twist grip sticks.
Twist grip end rubbing on handlebar. Deposit buildup under twist grip. Worn or broken twist grip or throttle cable. Throttle linkage improperly adjusted. Moisture under grip freezing in cold temp.

Chains loosen frequently.
Improperly seated chain adjustment bolts. Loose axle bolts. Improper chain alignment. Chains need lubrication. Twisted or distorted chains.
Excessive end play in wheel.
Loose axle bolts. Improper axle or wheel spacer thickness. Defective wheel bearings. Distorted bearing retainer housing in wheel.

Chain scoring tire sidewall.
Improper chain alignment. Improper axle spacer thickness. Defective wheel bearings.