Crankcase for CY 4-bolt Engines PDF Print $28.00 SKU: GZ-444 Crankcase for CY 4-bolt Engines Notify Me Add to Wishlist Add to Compare Back to: Aircooled Engines & Parts Description Chung Yang 4-bolt RC crankcase. Includes bearing and seals,crank bolts and crankcase gasket. Fits CY23RC / CY26RC / CY27RC / CY29RC / GP290 engines. Also fits Zenoah G23LH / G230RC / G260RC/G270RC/G290RC/ engines. HPI part # 15427.