PROX Casted Piston for YAMAHA YFM 350 GRIZZLY 2WD, YFM 350 GRIZZLY 4WD, YFM 350 RAPTOR 2WD, YFM 350 WARRIOR 2WD 1988-2014

PROX offers this piston kit for YAMAHA YFM 350 GRIZZLY 2WD, YFM 350 GRIZZLY 4WD, YFM 350 GRIZZLY IRS 4WD, YFM 350 RAPTOR 2WD, YFM 350 WARRIOR 2WD 1988-2014. 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 cast piston?

A cast piston is made by pouring liquid aluminium into a mould: it is what most manufacturers fit as standard, especially on two-strokes.

• High-silicon alloy: it expands little, is fitted with tight clearance and stays quiet when cold.
• Good wear resistance of the skirt and ring grooves.
• Lower price than a forged piston, for OEM quality in normal use.
• Limit: less tolerant of overheating and highly tuned engines.

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 on your YAMAHA YFM 350 WARRIOR 2WD?

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 50 h in hard use and every 100 h for leisure.

Specifications and fitting tips

• Material: Aluminium
• Piston compression: Standard
• Piston type: Casted

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.

Also needed with this part

• 4-stroke engine oil : MOTUL 10W50 · LIQUI MOLY 10W40 1 L

Compatibility

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

Fits:
YAMAHA YFM 350 BRUIN 2WD 2006
YAMAHA YFM 350 BRUIN 2WD 2005
YAMAHA YFM 350 BRUIN 2WD 2004
YAMAHA YFM 350 BRUIN 4WD 2006
YAMAHA YFM 350 BRUIN 4WD 2005
YAMAHA YFM 350 BRUIN 4WD 2004
YAMAHA YFM 350 GRIZZLY 2WD 2014
YAMAHA YFM 350 GRIZZLY 2WD 2013
YAMAHA YFM 350 GRIZZLY 2WD 2012
YAMAHA YFM 350 GRIZZLY 2WD 2011
YAMAHA YFM 350 GRIZZLY 2WD 2010
YAMAHA YFM 350 GRIZZLY 2WD 2009
YAMAHA YFM 350 GRIZZLY 2WD 2008
YAMAHA YFM 350 GRIZZLY 2WD 2007
YAMAHA YFM 350 GRIZZLY 4WD 2014
YAMAHA YFM 350 GRIZZLY 4WD 2013
YAMAHA YFM 350 GRIZZLY 4WD 2012
YAMAHA YFM 350 GRIZZLY 4WD 2011
YAMAHA YFM 350 GRIZZLY 4WD 2010
YAMAHA YFM 350 GRIZZLY 4WD 2009
YAMAHA YFM 350 GRIZZLY 4WD 2008
YAMAHA YFM 350 GRIZZLY 4WD 2007
YAMAHA YFM 350 GRIZZLY IRS 4WD 2011
YAMAHA YFM 350 GRIZZLY IRS 4WD 2010
YAMAHA YFM 350 GRIZZLY IRS 4WD 2009
YAMAHA YFM 350 GRIZZLY IRS 4WD 2008
YAMAHA YFM 350 GRIZZLY IRS 4WD 2007
YAMAHA YFM 350 RAPTOR 2WD 2013
YAMAHA YFM 350 RAPTOR 2WD 2012
YAMAHA YFM 350 RAPTOR 2WD 2011
YAMAHA YFM 350 RAPTOR 2WD 2010
YAMAHA YFM 350 RAPTOR 2WD 2009
YAMAHA YFM 350 RAPTOR 2WD 2008
YAMAHA YFM 350 RAPTOR 2WD 2007
YAMAHA YFM 350 RAPTOR 2WD 2006
YAMAHA YFM 350 RAPTOR 2WD 2005
YAMAHA YFM 350 WARRIOR 2WD 2004
YAMAHA YFM 350 WARRIOR 2WD 2003
YAMAHA YFM 350 WARRIOR 2WD 2002
YAMAHA YFM 350 WARRIOR 2WD 2001
YAMAHA YFM 350 WARRIOR 2WD 2000
YAMAHA YFM 350 WARRIOR 2WD 1999
YAMAHA YFM 350 WARRIOR 2WD 1998
YAMAHA YFM 350 WARRIOR 2WD 1997
YAMAHA YFM 350 WARRIOR 2WD 1996
YAMAHA YFM 350 WARRIOR 2WD 1995
YAMAHA YFM 350 WARRIOR 2WD 1994
YAMAHA YFM 350 WARRIOR 2WD 1993
YAMAHA YFM 350 WARRIOR 2WD 1992
YAMAHA YFM 350 WARRIOR 2WD 1991
YAMAHA YFM 350 WARRIOR 2WD 1990
YAMAHA YFM 350 WARRIOR 2WD 1989
YAMAHA YFM 350 WARRIOR 2WD 1988