Wössner Forged Piston for YAMAHA CHAPPY 50, DT 50 MX, TY 50, TY 50 M 1976-1994

WOSSNER offers this piston kit for YAMAHA CHAPPY 50, DT 50 MX, TY 50, TY 50 M 1976-1994. The piston slides in the cylinder and takes the force of the air-fuel combustion, passing it to the connecting rod and crankshaft.

Why choose a forged piston?

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.

• Stronger when hot: it copes better with high revs, overheating and detonation.
• Lighter for the same strength: less stress on the connecting rod and bearings.
• Good to know: depending on the alloy, it expands a little more and is fitted with more clearance; slight noise when cold is normal.
• Why does it cost more? Forging tools, full machining and surface treatments cost more than simple casting.

Why choose WOSSNER?

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.

When should you replace the piston on your YAMAHA CHAPPY 50?

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 15 h in hard use and every 30 h for leisure.

Specifications and fitting tips

• Material: Aluminium
• Piston compression: Standard
• Oversize Letter: A
• Rings Quantity: 2
• Stroke: 2T
• Forged piston
• Manufacturer part number: 8268DA

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.

Also needed with this part

• Top-end gasket kit : CENTAURO
• Spark plug : see the selection
• 2-stroke oil : LIQUI MOLY 1 L · LIQUI MOLY 4 L
• Air filter : see the selection

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
YAMAHA CHAPPY 50 1994
YAMAHA CHAPPY 50 1993
YAMAHA CHAPPY 50 1992
YAMAHA CHAPPY 50 1991
YAMAHA CHAPPY 50 1990
YAMAHA CHAPPY 50 1989
YAMAHA CHAPPY 50 1988
YAMAHA CHAPPY 50 1987
YAMAHA CHAPPY 50 1986
YAMAHA CHAPPY 50 1985
YAMAHA CHAPPY 50 1984
YAMAHA CHAPPY 50 1983
YAMAHA CHAPPY 50 1982
YAMAHA CHAPPY 50 1981
YAMAHA CHAPPY 50 1980
YAMAHA CHAPPY 50 1979
YAMAHA CHAPPY 50 1978
YAMAHA CHAPPY 50 1977
YAMAHA CHAPPY 50 1976
YAMAHA DT 50 MX 1985
YAMAHA DT 50 MX 1984
YAMAHA DT 50 MX 1983
YAMAHA DT 50 MX 1982
YAMAHA TY 50 1978
YAMAHA TY 50 1977
YAMAHA TY 50 M 1980
YAMAHA TY 50 M 1979
YAMAHA TY 50 M 1978
YAMAHA TY 50 M 1977
YAMAHA TY 50 M 1976