Hey, i need some help a.s.a.p. I live at 1000 feet, it is a keihin carb and i want to get spot on jetting if i can. Its a 2002 kx 100. I have a service manual also.  

Drop the needle to the 2nd clip and open the air screw up to 2 1/4 turns out - adjust the fuel screw form there until you get the best throttle response. Run 32:1 premix, and you should be all set. The stock 138 main jet should be perfect for your altitude. If it goes over 90 degrees out, run the 135 main.  

skip, where is the fuel screw on a kx100?????  

on the side of the carb - nearer to the airfilter end of the carb.  

I looked at the carburetor and there is only one screw along with the idle screw. WHere are they on the carb and which is which  

the airscrew is brass, and recessed in a hole, and takes a flahead screwdriver - does that help? You should see it on the left (shifting) side of the motor.  

Yeah, i saw that and turned it out 2 1/4, but i still cant find the fuel screw. I looked all around the carb and there is no other screw  

I'm sorry - I typoed.  it should have read 'set the airscrew at 2 1/4 turns and then adjust the airscrew to get the best throttle response' - there is only the air screw.  Sorry about that! D'oh!

The BIG difference on this bike is leaning the needle by moving the clip from the stock 4th postion to the 2nd position... it makes a HUGE difference!  

Oh ok,  but where is the needle? Is it on the carb or what? Where on the carb? Sorry, dont mean to ask a ton of questions, just trying to learn something  

The needle is in the carb.  You have to take the top off the carb, and the slide will come out (along with the needle).  If you are going to do this, I'd highly recommend having a Service manual for your bike handy...  

Ok, thanks for all the help skiph. Appreciate it  

No problem!  

Thats why i put up pics. LOL  

I'm still a newbie Woods - can't figure out the pic thing..