True 250cc Big Bore & Stage 3 Cam for TT250 & SG250

Unlock Your Engine's True Potential

Stop settling for "250" badges on a 229cc engine. This is the world’s first and only comprehensive performance package designed specifically for the CG250 platform. Extensively dyno-tested and refined, this kit transforms your stock 14HP machine into a 20.7HP powerhouse—a massive 48% increase in rear-wheel horsepower.

Whether you're looking for more grunt on the trails with your TT250 or better highway cruising on your SG250, this package delivers a night-and-day difference in torque and top-end pull.

What’s Inside the Box?

We’ve curated every single component to ensure a seamless install and maximum reliability:

• True 250cc Big Bore Cylinder: Replaces your stock 229cc jug for a nearly 10% displacement jump. Includes piston, rings, wrist pin, and clips.
• Stage 3 Performance Cam (292 Power): Pre-installed on a 44t cam gear for precise timing and aggressive lift.
• Rocker Arm Riser Plate: Custom stainless steel plate that allows you to maintain stock pushrod length—no guesswork required.
• Precision Tuning Parts: Includes a genuine Keihin main jet, 5-position adjustable needle, and a performance carb slide (Note: Fueling components not applicable for EFI models).
• The "Pro" Gasket Set: High-temp stainless steel head gasket, composite base gasket, and deluxe exhaust/valve cover gaskets.
• Installation Hardware: Magneto puller tool, crankshaft seal, and new 16mm location dowels.
• The Badge of Honor: Exclusive Stage 3 enamel badge to show off your build.