Why is my um CHILL 125 cc. silencer emitting blue smoke?
- LLaura MartinSep 9, 2025
If your UM Motorcycle silencer is emitting blue smoke, it could be due to: * A worn piston ring (replace the piston ring). * An improperly mounted piston ring (remount the piston ring). * Scratches or wear on the piston or cylinder wall (replace the piston or cylinder).