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The cylinder the piston moves up and down in: the heart of the engine.
MOOSE RACING offers this cylinder for YAMAHA WR 450 F, YFZ 450, YFZ 450 BB, YFZ 450 LE, YFZ 450 SE, YZ 450 F from 2003 to 2013. The cylinder is the part the piston moves up and down in thousands of times a minute. Its inner wall has a very hard coating that resists wear and holds compression.
The benefits:
Moose Racing, the American brand founded by riders in 1986 and distributed by the LeMans group (Parts Unlimited, Parts Europe), covers all off-road bike maintenance.
A scored or oval cylinder, or one with damaged plating, loses compression and wears the piston quickly. Measure the bore at every top-end rebuild: beyond the wear limit the cylinder must be replaced or resleeved.
Cross-Mania tip: Check the diameter of the supplied or required piston and replace the top-end gaskets. A big bore may require carburation or fuel-injection adjustment.
Check the exact model and year of your bike in the list below before ordering.
Fits:
YAMAHA WR 450 F 2006
YAMAHA WR 450 F 2005
YAMAHA WR 450 F 2004
YAMAHA WR 450 F 2003
YAMAHA YFZ 450 2013
YAMAHA YFZ 450 2012
YAMAHA YFZ 450 2009
YAMAHA YFZ 450 2008
YAMAHA YFZ 450 2007
YAMAHA YFZ 450 2006
YAMAHA YFZ 450 2005
YAMAHA YFZ 450 2004
YAMAHA YFZ 450 BB 2007
YAMAHA YFZ 450 BB 2006
YAMAHA YFZ 450 LE 2004
YAMAHA YFZ 450 SE 2007
YAMAHA YFZ 450 SE 2005
YAMAHA YFZ 450 SP 2008
YAMAHA YFZ 450 SP2 2008
YAMAHA YFZ 450 SPE2 2007
YAMAHA YZ 450 F 2005
YAMAHA YZ 450 F 2004
YAMAHA YZ 450 F 2003
Click on your bike to see all compatible parts.
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