Installation Guide

The CY cylinder has two bolts and they are 1.5 mm wider (between centers) so to fit into Zenoah G260PUM and other Zen clones, you need to use a Rat Tail file to oblong the holes slightly. Screw in the bolts, very tightly, I normally use a small pipe to lever the standard Hex Key to make it real tight. Pls use the supplied gasket and check for obstructions by pulling the recoil starter.

For better performance check the squish clearance using the solder lead method. Target is 0.08mm. Picture of Upgrade Kit You will get the performance of 4 to 5 HP with a with the correct length.

See -

Adjusting your Tune Pipe

Full Circle Teflon Stroker Crank