Rejet for sure...
You sure better or you're going to be one very unhappy guy.
They do that to cover their butts for emissions or something.
That is so wrong as to be absurd,and they should be ashamed of themselves. Heck, the STOCK bike needs re-jetted.
You shouldl install the het kit per the directions and the airbox mods if they're not already done,before you hit the starter button. Them just back ou tthe fuel screw an 8th at a time until, after the bike is warmed up completely,decel poppinh goes away.
You should listen to us that have been through all this bud, because that hing will bog,wheeze, backfire, and oh yeah-be SLOWER than stock !
Ignore that crap on their web sites. Doug