Window piston for 66cc/80cc motorized bike engines.
This kit includes (1) Window piston and (2) piston rings, along with a wrist pin, wrist pin clips, and wrist pin bearing.
 
Choose low pin (Wildcat/standard) or high wrist pin (for ZL40 rod) at checkout.
 
For use with GTZ ported cylinder and GTZ reed! Don't forget to get one!