My cousin is getting a pipe for his 350 raptor and maybe some more minor mods, but he has no idea how to go about jetting, both of us are total novices when it comes to this. He just got his first quad and I'm soon getting my first. Does he need to buy some sort of jetting kit or something? Anyone know of a site that I could go to that would be able to help us out with this?

 

Im not sure on the sizes he will need but he definetly needs a jetting kit, so go ahead and order that now.

 

Heres a good article on the how to of jetting.
jetting
Id just buy the individual jets. Get 2, 3 and 4 sizes up on the main , and maybe one up on the pilot jet. Dennis kirk and others sell the jets very cheap...no need for a 45 dollar jet kit. You can raise the needle yourself, and adjust the mixture screw.
Just remember that throttle posittion, not rpm .....determines the jet range in use.

 

alright thanks for the info guys, this should be a big help.