its annoying i know but its common with mainly series 1 mx83,s but ive seen a couple of late ones do it , it does seem they overfuel when starting, its get worse when when u make the head flow better and bump the comp up a bit, i have never looked into fixing it as u just crank it a bit longer and then they start. karmen vortex afm 7m,s dont have the problem which is nice
D