i have been ridin my now for a bit and running the hell out of it and i havent had to touch the valves, some people are TO GUNHOE and they jump on every sound they here and that is how they make the new name of unreliable. Mine starts every time no problems yet and i ride it every day i keep it well taken care of..

 

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what the,my 07 trx allready needs a new piston
I have (2) 05 450r's with about 45hrs on them and I ride them like I stole them... Havent has a problem, start right up, adjusted the valves once when I installed the cam on one of them, you must have had a lemon or somthing, I also purchaced a warranty on the engine and everything so hopefully when that stuff out they fix it. Anyways its a race quad expect the maint.

 

zettler450r i am with you .