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I have a 2010 yz450f and recently it seems to gradually be loosing power.  It has tons of compression and has no issue starting and is still fast like a 450 but doesn't have the torque or the jump like it did.  The bike just seems to rev up and not really go...it barely pulls the front wheel in 2nd gear compared to pulling wheelies in 4th when it was running good.  I am not too good with the 4 stroke engines and any help would be great!  I can answer questions to help figure it out to.



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