The pistons are back!

Fred's special modified pistons are one of the keys in unlocking the performance of your 2 stroke motorized bicycle engine.

This is a type B piston for the GT-5 engine. Please note the high wrist pin hole location.

Special bevels are precision CNC machined on the piston crown.

This advances the transfer and exhaust timing for better performance.

The transfer port bevels also aid in a smooth flow in the cylinder.