I've been dealing with this happy horse **** since this bike was new and stock.. it refuses to start when it's cold out.. Now after I have done the big bore/head/stg 3 cam/450r carb it still refuses to start when it's cold.. I didn't ride it for almost 2 years.. Went completely through carb, and bought a lipo battery with 275 cca, still when it's cold it does not want to start. I've built plenty of engines and never have had a rotten thing as much as these ex's. I need to find a way to hook the choke up but there isn't a way to get a lever on the choke with this carb.. yes valves are spot on and carb is spot on with jetting, just went over all of that. I'm planing on going to HM trails mid March and I don't need this thing not starting when it's cold. Anyone else out there have a pita bike trying to fire up when it's cold ? RANT OVER HAHAH