YAMAHA YZ 250 [1977-1979] - WÖSSNER forged pistons

WÖSSNER forged pistons for the YAMAHA YZ 250

The WÖSSNER forged piston is designed for the YAMAHA YZ 250 from the entire 1977-1979 model year range. The design combines a forged construction with an aluminum piston and is suitable for targeted selection based on the specified dimension and specification data.

Design and technical data

• Piston Type: Forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 70.44 mm
• Letter oversize: 050
• Oversize: +0.05
• Bore diameter: 70.50 mm
• Rings Quantity: 2
• Stroke: 2T

The dimensions support the assignment to the intended cylinder bore. The diameter of 70.44 mm, the bore diameter of 70.50 mm and the marking of the oversize with 050 and +0.05 are particularly relevant for the selection. The standard piston compression complements the technical specification for this version.

Vehicle assignment

The forged piston is assigned to the YAMAHA YZ 250, built between 1977 and 1979. Before making your selection, please compare the specified dimensions, the oversize marking and the 2T version with the intended engine.