Full hmf on raptor 660
air filter adaptor plate and foam filter
475 ft above sea level

ok, now im confused are the 150/155 screws for example the same thing as fuel mixture screws?

if they are, i backed them 2.5 turns out and it is just compleatly cutting out on the mid range gears and top end at high rpm.

Where is the needle clip???

 

It sounds like the bike is lean, not getting enough fuel. try uping the mains before messing with the air/fuel screw.

 

which one is the air/fuel screw?

 

the only one that you can adjust by turning and not replacing, and the only one you can get to without removing the float bowls. the mains probably need to be upped as the last member stated.

 

ok, one last question and then im good, are the 150/155 jets supposed to be turned all the way in

 

Raptor0502 I think your a litte bit confused.
Main jets are a small piece of metal (usually made of brass) that go inside of the carb. You just take the float bowl off and unscrew the old jets and screw in the new ones and your done. Main jets regulate from about mid to wide open throttle.

 

ok, my problem was that i was that i wasent setting the fuel screw to the smoothest highest possible idle and then setting the regular idle. thanks

 

the eisiest way i have found to avoid jetting problems is buy a fuel injected machine............Sorry i just couldent resist.

 

[img]i/expressions/face-icon-small-confused.gif[/img]..............Are you sure you can attempt this? Maybe you should take it to a dealer or a mechanic.

 

dude, wtf werent you watching me?? you always put the main mixture screws in all the way, and then you mess witht eh idle with that thing in the middle. What sizes did you get at columbia today?? Sry i had to work though..