With this cylinder, you restore the compression and power of your engine block.
You will notice wear on the cylinder wall or a seized piston by power loss, difficulty starting, and increased smoke. This cylinder restores the proper fit and compression.
This part is suitable for Yamaha, Aprilia, and Minarelli, among others (with a bore of 40.0mm).
Check that the bore and tap distance match your engine block, and always install with a new gasket set.
