The high dollar, aftermarket, ultra expensive, what the pros use, oils made specifically for 2 stroke motorcycle and ATV crank cases are nearly all synthetic, so I personally find the notion that they cause clutch problems silly, but some people staunchly believe this theory.Originally Posted by 84 Yamahauler
I dont generally run full synthetics in two strokes, because its over kill and a waste of money, not because because of any fear of clutch problems. This is wheer I use whatever happesn to be laying around of the appropriate weight. I like the semi synthetics like Synthec, but 10w40 Dollar General oil will do the job too, just have to change it sooner.