SSP-G GY6 241cc 4V Power Kit

Regular price $1,899.99

Shipping calculated at checkout.
SSPGSSP-G 241cc big bore kit and 4V Cygnus style head for GY6 Engines.

This complete power kit comes with a 67mm cylinder kit and matching crankcase with all of the oil seals installed. 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. For drag racing, the included oil bypass fitting may be installed.

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 installed
  • 250 degree camshaft, cam gear, cam chain and roller rockers
  • Anodized head and cam covers
  • 10.5mm stroker crank and 6mm cylinder spacer
  • 32mm Exhaust
  • Gaskets, cylinder studs, and associated hardware


The manufacturer suggests that up to 27hp 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, 15/38 rear gears, and a performance clutch and variator kit. Please see related items.

Please see our Warranty & Returns Policy.