PROX piston ring set Ø 66.40 mm for GAS GAS EC 250, MC 250, SM 250 and SHERCO SE 250, SER 250 1998-2024

Check before ordering

• Diameter: Ø 66.40 mm

PROX offers this piston ring set for GAS GAS EC 250, MC 250, SM 250 and SHERCO SE 250, SER 250 1998-2024. 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 PROX?

ProX has its pistons made in Japan and the USA, with Japanese rings (Riken, TP or NPR) and tolerances at least equal to OEM; most of its four-stroke pistons are forged.

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 20 h in hard use and every 40 h for leisure.

Specifications and fitting tips

• Manufacturer part number: 02.7307

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 : WISECO · PROX
• Top-end gasket kit : TECNIUM · ATHENA
• 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:
GAS GAS EC 250 2020
GAS GAS EC 250 2019
GAS GAS EC 250 2018
GAS GAS EC 250 2017
GAS GAS EC 250 2016
GAS GAS EC 250 2015
GAS GAS EC 250 2014
GAS GAS EC 250 2013
GAS GAS EC 250 2012
GAS GAS EC 250 2011
GAS GAS EC 250 2010
GAS GAS EC 250 2009
GAS GAS EC 250 2008
GAS GAS EC 250 2007
GAS GAS EC 250 2006
GAS GAS EC 250 2005
GAS GAS EC 250 2004
GAS GAS EC 250 2003
GAS GAS EC 250 2002
GAS GAS EC 250 2001
GAS GAS MC 250 2009
GAS GAS MC 250 2008
GAS GAS MC 250 2007
GAS GAS MC 250 2006
GAS GAS MC 250 2005
GAS GAS MC 250 2004
GAS GAS MC 250 2003
GAS GAS MC 250 2002
GAS GAS MC 250 2001
GAS GAS MC 250 2000
GAS GAS MC 250 1999
GAS GAS MC 250 1998
GAS GAS SM 250 2005
GAS GAS SM 250 2004
GAS GAS SM 250 2003
GAS GAS SM 250 2002
SHERCO SE 250 2024
SHERCO SER 250 2023
SHERCO SER 250 2022
SHERCO SER 250 2021
SHERCO SER 250 2020
SHERCO SER 250 2019
SHERCO SER 250 2018
SHERCO SER 250 2017