YAMAHA YZ 490 [1985-1988] - forged pistons

WISECO forged pistons for YAMAHA YZ 490 from 1985 to 1988

The WISECO forged piston is a piston for the upper engine area of the YAMAHA YZ 490. It is designed according to the vehicle model for the years 1985 to 1988 and has standard piston compression.

Design and technical data

• Piston Type: Forged
• Material: aluminum
• Diameter Ø: 88.50 mm
• Piston compression: standard
• Letter oversize: 150
• Oversize: +1.50
• Stroke: 2T

The forged aluminum design and the size of 88.50 mm clearly characterize this piston. The stated oversize is +1.50; In addition, the letter oversize is shown as 150. For the engine variant, the piston is marked as a 2T version.

Vehicle assignment

The forged piston fits the YAMAHA YZ 490 in the full year range 1985-1988. The assignment applies to this model and this period.

Selection note

Before making your selection, check in particular the required dimension of 88.50 mm, the oversize +1.50 and the marking “150”. These technical features should be compared with the existing engine.