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

WÖSSNER forged pistons for YAMAHA YZ 250, built between 1977 and 1979

The WÖSSNER forged piston is designed as a spare part for the YAMAHA YZ 250 from the entire 1977-1979 model year range. The vehicle assignment supports a targeted selection for the engine range and clearly limits the product to this model and these years of manufacture.

Design and technical data

• Piston Type: Forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 71.44 mm
• Letter oversize: 150
• Oversize: +1.50
• Bore diameter: 71.50 mm
• Rings Quantity: 2
• Stroke: 2T

The combination of forged construction, aluminum and standard piston compression describes the basic characteristics of this piston. The specified diameter of 71.44 mm and the bore diameter of 71.50 mm make it easier to compare the required engine data. The markings “Letter Oversize: 150” and “Oversize: +1.50” must also be taken into account when selecting parts.

Vehicle assignment

Suitable for YAMAHA YZ 250, built in 1977, 1978 and 1979. The assignment applies to the specified full year range 1977-1979.

Selection note

Before ordering, the vehicle model, year of manufacture, bore diameter and oversize information should be compared with the existing engine data. When selecting this product, the 71.50 mm bore diameter, +1.50 oversize and the marking 150 are particularly important.