Hey guys I just recently bought a Yoshimura Rs-2 slip on exhaust on my 2011 raptor 700, and was told I didn't have to remap it because its only a slip on. So now when I start it occasionally it will start sound fine for about 30 secs then die, but if I give it a rev or 2 it runs/sounds fine. took it to the desert and it ran like a bat out of hell with no problems except for the initial start up....as you can understand this is freaking me out since my bike is relatively new it only had 7 hours on it when I bought it 4 months ago but has never done this until the new exhaust. I have not tried putting the stock exhaust back on and testing it yet but plan to real quick. I've read alota different threads about this and from what i'm seeing it could be so many different things, but the main clue I can give to you guys that know far more then myself is It never happen until the new Slip-on exhaust =( so any advice or fix's will greatly help, and should I stop running it until the fix is found? Not running any other mods as of yet either, first mod was the exhaust.