grease,
You went back to your stock jetting and the same thing happens right?Ok,It could be a crank seal on the gearlube side or water pump side to make it smoke alot,which making it smoke bad.It also can be broken reeds.Its really hard to tell what the problem iswithout seeing or hearing the bike.Just make sure you have new plug,clean filter,check the reeds out make sure their in good shape.If it smokes bad,it could be the transmission seal bad,where it will suck gear lube in to the cylinder and smoke really bad.