Raises compression from stock 9.5:1 to 10.5:1 for more power and snappier response. The high quality forged piston from JE is almost a full ounce lighter than the stock cast piston. This makes for less vibration and a smoother running motor. Fits the standard size stock bore.
Raises compression from stock 9.5:1 to 10.5:1 for more power and snappier response. Highest quality Wiseco pistons are forged in the USA. Fits the standard size stock bore.
As with any engine or exhaust modification, you will need to re-tune your fuel delivery system for optimum performance.
Stock bore replacement pistons from Wiseco. You have your choice of the standard compression ratio of 12.2:1, or a high-compression ratio of 13.5:1.
This high-compression kit will run perfectly with standard pump Premium.
Kits include piston, rings, wrist pin and circlips.
The Complete Top End Performance Kit includes:
10.5:1 compression JE piston with rings, wrist pin and circlips (the actual measured stock compression is only 8.7:1).
Stage 2 Web Cams high performance camshaft for more power (reground from brand new OEM Suzuki camshafts).
Top end gasket set with metal base gasket.
We strongly recommend checking valve to piston clearance when installing a non-standard camshaft.
Raises compression from stock 9.5:1 to 10.5:1 for more power, torque and snappier engine response. The high quality forged piston from JE is almost a full ounce lighter than the stock cast piston. This makes for less vibration and a smoother running motor. Includes rings, pin, clips, and top end gasket set with valve stem seals and metal base gasket. Fits the standard size stock bore.
If you're plannig to or already have a stroker crank setup in your Yamaha WR250R/X, you'll need this stroker piston.
Features:
