2009 yz 450 f problems ?

4 replies to this topic
  • roosted1

Posted November 30, 2013 - 10:44 PM


hi looking at purchasing a very clean and well looked after yz 450f. can anyone tell me if this model bike give the gear box  problems the earlier models gave

also do they have any other problems ? 


  • phillybob

Posted December 02, 2013 - 08:10 PM


Over all a good bike. I have about 150 hrs on mine in 2 yrs. of racing harescrmbles and weekend trail riding.Enginewise no problems.Banged it into gear a few times no tranny explosion yet.Have the valves ,valve seats checked every yr.my exhaust valves needed a little shim so far.Only problem so far is the inner cartridge of the forks,blew both free pistons to bits twice before i saw how to rectify the problem.ordered the aftermarket aluminum ones .For motocross its fun,harescrambles its a handful! Its heavy!Coming from a 2 stroke cr 250 to a 4 stroke 450 was a shock .No more instant pow. Just instant giddy up and go .Jumping is a breaze.Clutch handled plenty of abuse,was still within specs .piston was good needed new rings. Hope this helped.   Phil

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  • Gunner354

Posted December 02, 2013 - 08:13 PM


hi looking at purchasing a very clean and well looked after yz 450f. can anyone tell me if this model bike give the gear box problems the earlier models gave
also do they have any other problems ?

No gear box problems. The stock pipe is junk and the cdi timing curve is tame. Dr D pipe and an 06 yz450 cdi and it's a whole knew motor

  • grayracer513

Posted December 03, 2013 - 07:48 AM


Gear problems.  Hmm.


Here's a couple of gears from an '06 with 300+ hours on it.  They were swapped out for the WR 4th and 5th.  I don't see a gear problem.





  • roosted1

Posted December 03, 2013 - 12:23 PM


thanks for the replies guys , I bought it last night   !     very happy :)

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