I have a 2002 400ex and I am looking at getting jets for it. I has an exhaust system on it. I have been reading and someone recommended a 40 pilot and a 150 main to make the cold starts easier. What do you guys think and where can I get these. I am having problems finding a good site on the net, thanks

 

www.jetsrus.com

 

42/160 ur good

 

Almost any local motorcycle/atv dealership will have what you need. Youre not gona save that much to mail order 2 jets.