450r low end sputtering

[wright647]

i have a 05 450r and it is missing at 1/4 throttle it only has about 15 hrs on it the shop said they cant figure it out.so if any body has had simular problems please let me know every thing is stockand it ran good for a couple of days so i know it was not the jetting i heard about the throttle positioning sensor being a promblem please help

[DirtDevilBT]

:eek2: Heck of a shop you got there. Check your fuel mixture screw, I think it needs to be 2 turns out. If it is then you will need to go into the carb and clean it. The first thing to get clogged is the pilot jet and that's pretty much what you are talking about. You'll need to take the carb off and take the bowl off the carb. If you have a manual it would help explain the rest.