Yamaha WR 250 F (CG 11) [2001-2002] - WÖSSNER Pro Series forged pistons

WÖSSNER Pro Series forged pistons for Yamaha WR 250 F

The WÖSSNER Pro Series forged piston is assigned to the Yamaha WR 250 F (CG 11) in the entire 2001-2002 model year range. The design combines aluminum as a material with a forged piston type and is designed for defined selection based on the technical engine data.

Technical data

• Material: aluminum
• Piston Type: Forged
• Diameter Ø: 76.97 mm
• Letter oversize: B
• Oversize: +0.01
• Bore diameter: 77.01mm
• Compression ratio: 13.3:1
• Rings Quantity: 2
• Stroke: 2T

Execution

The technical specification includes a double forged bridge/gas connection. The specified diameter of 76.97 mm, the bore diameter of 77.01 mm and the marking of the oversize with the letter B are particularly relevant for the selection of parts. The oversize measurement is +0.01.

Vehicle assignment

The forged piston fits the Yamaha WR 250 F (CG 11), built between 2001 and 2002. The assignment refers to this vehicle type and this complete range of years of manufacture.

Selection based on engine data

Before ordering, the technical characteristics should be compared with the existing engine. The decisive factors are the diameter, bore diameter, oversize, compression ratio and the design with two rings.