WOSSNER 68mm PISTON KIT YAMAHA YZ250 1988-1991

Wossner Forged Piston Kit 68.00mm Bore – Yamaha YZ250 / WR250 (1988–1991)
This Wossner forged piston kit is designed for Yamaha YZ250 and WR250 models produced from 1988 to 1991. Featuring a 68.00 mm bore and a piston diameter of 67.94 mm (standard size), this high-performance component is ideal for 2-stroke engine applications requiring superior strength, thermal efficiency, and dimensional stability. The elliptical piston profile ensures balanced thrust load distribution, reducing stress concentrations and potential failures. Made in Germany with precision engineering.

Features

• Forged piston construction for enhanced strength and durability

• Efficient combustion heat transfer to cylinder walls

• Elliptical design ensures uniform bearing surface and balanced pressure distribution

• Precision-manufactured in Germany

Specifications

• Bore Size: 68.00 mm

• Piston Diameter: 67.94 mm

• Engine Displacement: 246 cm³

• Stroke: 68.00 mm

• Clearance: 0.06 mm

• Compression Height: 36.00 mm

• Compression Ratio: 2-stroke (Wossner and OEM)

Cross-Reference Wossner Part Numbers

• Piston Kit: 8134DA

• Lock: CW18

• Pin: WP033

• Ring Set: RSB6800 x 2

Vehicle Fitments

• 1988 Yamaha YZ250

• 1988 Yamaha WR250

• 1989 Yamaha YZ250

• 1989 Yamaha WR250

• 1990 Yamaha YZ250

• 1990 Yamaha WR250

• 1991 Yamaha YZ250

• 1991 Yamaha WR250

Majority of our listings are for a direct replacement for your original part.

Our parts are made of quality and are designed to meet or exceed the original OEM Standards.

Our products are often a cost effective alternative to genuine OEM Parts.

Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.