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DieselBoy
03-23-2006, 02:23 AM
is the yfz450 engine rated for any given amount of hours the motor will last like the CRF? or is it just guess'n'go...

If I go to look at a couple, is there any way of checking if the crank/main bearings/etc are in good shape? I dont want to screw around with cranks...
nwi45
03-23-2006, 09:45 AM
mitchyfz, are you serious?
DieselBoy
03-23-2006, 01:36 PM
you are not alone. there are so many people on this website with motors that keep blowing up, i would like to know how/why
DieselBoy
03-23-2006, 09:32 PM
anyone else??? there isnt a heck of alot going on in the YFZ forum.
Rrider4life8
03-24-2006, 07:37 PM
uhh, mine is an 2004, Ive rebuilt it 4 times with about 60 to 70 hours inbetween. Nothing was wrong with the motor. I installed the WR 450 components and wanted to keep it fress. If you ride like me youll want to replace clutch, piston, rings ever 70 to 100 hours to keep here nice
DieselBoy
03-25-2006, 02:39 AM
how bout a guy who rides, maintains and doesnt hit the rev limiter, or even come close??? i dont abuse my stuff , how many problem free hours may i expect.
Rrider4life8
03-25-2006, 07:16 AM
I know people who trail ride with an 04 and havent even touched the motor, just replaced thee oil every 3 to 5 rides.