CY +1mm Stroker Crank set

CY - Chung Yank  +1mm Stroker crank option upgrade part for all CY engines increases the cc's of your motor.
Gives 29mm stroke - 1mm longer than stock 28mm stroke.
Forged, heat treated, and ground. Journal diameter same as stock G230RC crank size.

Fits Zenoah G23LH / G230RC / G260RC.
CY - Chung Yang CY23RC / R230 / CY26RC / R260 / CY27RC / R270 / GP290 / F270 engines.
Note: May require modifications to the piston for proper journal clearance on the piston skirt.
Also clearnce in Cylinder head is needed for the extra crank length clearance.

Squash clearance ~ 0.5mm (0.02in)