Hey guys, I got a 125cc 2-stroke. When it starts up it revs pretty high and then after a minute the revs come down and it revs too low and a bit rough and sometimes shuts off. It rides a bit rough although there is power, but it seems to bog just a bit. Also it smokes a lot. I'm running it at 40:1 with
Bel-Ray H1R 100% synthetic 2-stroke oil. Air screw is turned out 1 full turn. Any help is appreciated.