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WOSSNER offers this piston kit for YAMAHA YTM 200, YZ 80 1978-1991. The piston slides in the cylinder and takes the force of the air-fuel combustion, passing it to the connecting rod and crankshaft.
Instead of simply being cast, a forged piston is hot-pressed under very high pressure and then machined: its metal is denser and free of air pockets.
Wössner has forged its own pistons since 1994: Molykote-coated skirt to reduce friction and ease running-in, kit supplied complete with rings, pin and clips.
Harder starting, loss of power, blue smoke, oil consumption or a knock when cold: these are the signs of a tired top end.
No manufacturer hour figure for this model. Cross-Mania guideline: compression check every 20 h in hard use and every 40 h for leisure.
Available in several sizes: choose the one that matches your cylinder (stamped size or measured bore).
Cross-Mania tip: Measure the cylinder bore before ordering: the piston must match your cylinder size. Follow the manufacturer's break-in procedure and replace the top-end gaskets at the same time.
Check the exact model and year of your bike in the list below before ordering.
Fits:
YAMAHA YTM 200 1991
YAMAHA YTM 200 1990
YAMAHA YTM 200 1989
YAMAHA YTM 200 1988
YAMAHA YTM 200 1987
YAMAHA YTM 200 1986
YAMAHA YTM 200 1985
YAMAHA YZ 80 1980
YAMAHA YZ 80 1979
YAMAHA YZ 80 1978
Click on your bike to see all compatible parts.
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