PISTON KIT 92-98 YZ250 68.50, WOSSNER 8023D050

This Wossner forged piston kit is tailored for Yamaha YZ250 (1992–1998) and WR250 (1992–1999) two-stroke engines with a +0.50mm oversize. Manufactured in Germany, this piston is engineered for optimal heat dissipation and mechanical strength. The elliptical piston design ensures consistent expansion and even pressure distribution under high temperatures, preventing collapse and extending engine life. The piston’s construction promotes effective transfer of combustion heat to the cylinder walls for dependable performance under load.

Features

• High-strength forged piston construction

• Elliptical profile promotes uniform heat expansion and load bearing

• Minimises localised pressure to prevent piston damage

• Enhances combustion heat dissipation to cylinder walls

• German-manufactured for precision and quality

Specifications

• Bore Size: 68.50mm (+0.50mm oversize)

• Actual Diameter: 68.44mm

• Compression Height: 36.00mm

• Stroke: 68.00mm

• Displacement: 246 cm³

• Piston Clearance: 0.06mm

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

Cross-Reference OEM Part Numbers

• Piston Kit Part No: 8023D050

• Lock: CW18

• Pin: WP033

• Ring Set: RSB6850 x2

• Rod: P2029

Vehicle Fitments

• 1992 Yamaha WR250

• 1992 Yamaha YZ250

• 1993 Yamaha WR250

• 1993 Yamaha YZ250

• 1994 Yamaha WR250

• 1994 Yamaha YZ250

• 1995 Yamaha WR250

• 1995 Yamaha YZ250

• 1996 Yamaha WR250

• 1996 Yamaha YZ250

• 1997 Yamaha WR250

• 1997 Yamaha YZ250

• 1998 Yamaha WR250

• 1998 Yamaha YZ250

• 1999 Yamaha WR250