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 22mm 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, cam chain and roller rockers
- Anodized head and cam covers
- 8.2mm stroker crank
- Gaskets, cylinder studs, 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.
- Cylinder Bore: 67mm
- Cylinder Height: 75.2mm
- Cylinder Stud Spacing: 57mm ("B Case")
- Overall Left Crankcase Length: 20 inches
- Includes All Gaskets and Hardware
- Made in Taiwan
**SUPPORTING MODELS GY6 QMI/QMJ 152/157
**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.