WOSSNER piston ring set for YAMAHA WR 250 F, WR 250 R, TM RACING EN 250 F, MX 250 F and GAS GAS EC 250 F from 2001 to 2020

WOSSNER offers this piston ring set for YAMAHA WR 250 F, WR 250 R, TM RACING EN 250 F, MX 250 F and GAS GAS EC 250 F from 2001 to 2020. 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?

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 30 h in hard use and every 60 h for leisure.

Specifications and fitting tips

• Bore: 77.00 mm
• Engine: 4-stroke
• Replacement ring set

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 : VERTEX · PROX
• Top-end gasket kit : ATHENA · COMETIC
• 4-stroke engine oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50

Compatibility

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

Fits:
GAS GAS EC 250 F 2013
GAS GAS EC 250 F 2012
TM RACING EN 250 F 2010
TM RACING EN 250 F 2009
TM RACING EN 250 F 2008
TM RACING EN 250 F 2007
TM RACING EN 250 FI 2011
TM RACING MX 250 F 2010
TM RACING MX 250 F 2009
TM RACING MX 250 F 2008
TM RACING MX 250 F 2007
TM RACING MX 250 FI 2011
YAMAHA WR 250 F 2013
YAMAHA WR 250 F 2012
YAMAHA WR 250 F 2011
YAMAHA WR 250 F 2010
YAMAHA WR 250 F 2009
YAMAHA WR 250 F 2008
YAMAHA WR 250 F 2007
YAMAHA WR 250 F 2006
YAMAHA WR 250 F 2005
YAMAHA WR 250 F 2004
YAMAHA WR 250 F 2003
YAMAHA WR 250 F 2002
YAMAHA WR 250 F 2001
YAMAHA WR 250 R 2020
YAMAHA WR 250 R 2019
YAMAHA WR 250 R 2018
YAMAHA WR 250 R 2017
YAMAHA WR 250 R 2016
YAMAHA WR 250 R 2015
YAMAHA WR 250 R 2014
YAMAHA WR 250 R 2013
YAMAHA WR 250 R 2012
YAMAHA WR 250 R 2011
YAMAHA WR 250 R 2010
YAMAHA WR 250 R 2009
YAMAHA WR 250 R 2008
YAMAHA WR 250 X 2011
YAMAHA WR 250 X 2010
YAMAHA WR 250 X 2009
YAMAHA WR 250 X 2008
YAMAHA YZ 250 F 2013
YAMAHA YZ 250 F 2012
YAMAHA YZ 250 F 2011
YAMAHA YZ 250 F 2010
YAMAHA YZ 250 F 2009
YAMAHA YZ 250 F 2008
YAMAHA YZ 250 F 2007
YAMAHA YZ 250 F 2006
YAMAHA YZ 250 F 2005
YAMAHA YZ 250 F 2004
YAMAHA YZ 250 F 2003
YAMAHA YZ 250 F 2002
YAMAHA YZ 250 F 2001