Not sure how well the choke circuit is protected on those quads, but its common for the Raptor to leak a little water into where the choke cable enters the carb and seize the choke piston. Feels like you're pulling the choke, but the bikes becomes real hard to start or just plain runs funny.

I rebuilt the choke circuit with the Yam choke kit and it works great now. I've seen this on 3 raptors.

jbt

 

ionno, lately since its been warmin up its been startin badly, i changed the "starter jet" as the called just b4 it got really cold so i'm now i'm wonder if its gettin tooo much fuel makin it not idle worht a f***