Description
SSP-G 232cc big bore kit and 4V Cygnus style head for GY6 Engines. This complete power kit comes with a 67mm cylinder kit and matching crankcase. This means there is no machining of the crankcase required! The crankcase is also pre-drilled and tapped for an oil cooler, which is a necessity on street ridden bikes. An oil block off fitting is included for race bikes. Includes the following: Complete 4-Valve Cygnus style cylinder head assembly with 25mm intake valves and 23mm exhaust valves
67mm ceramic coated cylinder and high compression forged piston
Right and left engine cases with oil seals and bearings (must be installed by end user)
250 degree camshaft, cam gear, and roller rockers
Anodized head and cam covers
8.2mm stroker crank
Gaskets, cylinder studs, 96 link cam chain, and associated hardware The manufacturer suggests up to 25hp at 10,800 RPM is possible with this kit. Some recommended additions (not included with kit) are: a high torque starter and starter clutch, an oil cooler kit for street riding, a high quality (such as Bando) 842-20-30 belt, 34mm PWK carburetor, quick throttle, rear gears, and a performance clutch and variator kit. Please see related items. Please Note: This kit is for experienced users only. Modifications may be required to ensure the engine will function properly. The cases need to be relieved when using the +8.2mm crankshaft or there may be interference with the piston. Stacking multiple base (cylinder) gaskets will help to make compression levels more manageable. Please see our Warranty & Returns Policy.
Cylinder Bore: 67mm
Cylinder Height: 75.2mm
Cylinder Stud Spacing: 57mm (“B Case”)
Overall Left Crankcase Length: 20 inches
23mm Exhaust Valves
25mm Intake Valves
Includes All Gaskets and Hardware
Made in Taiwan
SUPPORTED MODELS: GY6 QMI/QMJ 152/157