i need some help? i have an 04 raptor, and i just bought a full yoshimura exhaust and k&n pro flo kit it has no directions on how to set up the carbs so i hope you can help, not sure what the elevation is here, but i live in michigan. i would also like to run the lid off. i think the stock jets are 145/150. thanx

 

If you are near sea level..... Alot of people with the same setup run no airbox lid and 160-165 jets. Its winter now so to be safe you may want to start at 165/170. Then do the airbox mods Yoshi suggests. You should be able to start without messing with needles and only turning your air screws about 1/4 turns. That will get you started anyway.

 

I would put in 165/170 mains
25 pilots
2 1/2 turns out on the mixture screws