TTMRC 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

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.