This custom-built CY31RC engine, available exclusively at DDM, offers simply amazing performance. 30.5cc's of modified and fully ported power. 36mm bore, 30mm stroke. Simply put, this engine is the "king of kings" - it will out-torque and out-rev any other piston port 30.5cc motor. Aprox 4.5+ horsepower, and 6+ horsepower with a tuned pipe. Available in black or chrome, and with or without inner clutch. DDM has taken the hassle out of getting a massive 30.5cc motor - we've custom built them for you. The engine comes fully assembled and ready to bolt-on. The 35mm top-end is removed and set aside. We want a larger, 36mm top-end for increased displacement and power! But the stock 36mm cylinder does not have room for the long 30mm stuffed crankshaft, so ESP has machined out the proper spacing. This is a more efficient and reliable solution than stacking gaskets to achieve the needed space, as there is proper spark plug clearance, the piston ring remains in the well-plated area of the cylinder, and the ignition coil remains properly gapped to the flywheel. After the cylinder spacing modifications are complete, ESP then fully ports the engine. ESP completely tears down the engine and spends hours, cutting in great detail, the porting that will have you grinning from ear to ear.
