Wössner Ø85.5mm Single Piston Ring for YAMAHA DT 400, IT 425, IT 465, YZ 400 COMPETITION, YZ 465 1975-1982

WOSSNER offers this piston ring set for YAMAHA DT 400, IT 425, IT 465, YZ 400 COMPETITION, YZ 465 1975-1982. Rings are thin steel bands sitting in the piston grooves. They press against the cylinder wall to hold compression and scrape oil.

Why replace the rings?

The benefits:

• Regain compression and power.
• Reduce oil consumption and smoke.
• A cheap fix when piston and cylinder are still within spec.

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 rings on your YAMAHA DT 400?

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.

Specifications and fitting tips

• Manufacturer part number: RSC8550

Cross-Mania tip: Check the ring end gap in the cylinder before fitting and respect the fitting direction (mark facing up).

Also needed with this part

• Piston : VINTCO
• Top-end gasket kit : VINTCO KTE046 · VINTCO KTE045
• 2-stroke oil : LIQUI MOLY 1 L 3065 · LIQUI MOLY 1 L 3063

Compatibility

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

Fits:
YAMAHA DT 400 1978
YAMAHA DT 400 1977
YAMAHA DT 400 1976
YAMAHA DT 400 1975
YAMAHA IT 425 1980
YAMAHA IT 465 1982
YAMAHA IT 465 1981
YAMAHA YZ 400 COMPETITION 1979
YAMAHA YZ 400 COMPETITION 1978
YAMAHA YZ 400 COMPETITION 1977
YAMAHA YZ 400 COMPETITION 1976
YAMAHA YZ 465 1981
YAMAHA YZ 465 1980