07 trx 450er will not idle or start good

[crewworrior]

i have an 07 450er, all of a sudden this thing is very hard to get started, ive been roll starting it, and it will not idle,ive checked the carb its clean and the air fuel mix is good, someone told me that it could be the valves but im hoping its not. any help is greatly appreciated.

[sc400ex_rider]

you need to richen your pilot jet, for the cold start and prolly your main. they are jetted lean from the factory for emmision's purposes. if its all the sudden your pilot jet is clogged. valves should not be out of spec on an 07

[crewworrior]

well i guess i should have added that the stock jets here are 42/120 and im up to a 48/130 and it also has a k&n with an outerwear,fmf titanium 4 shorty slipon, it was running really good and all of a sudden it was just hard to start, and it doesnt idle good if you get it where it will idle its really high then it will drop fast and die

[400exrider707]

Jetting sounds too lean, and I would still check the valve clearances to be sure.

[crewworrior]

got it fixed tonight it was the intake valves were a little out of spec. thanks.