The lack of ash on top of the piston.quote:
Why do you think Series 2000 is ashless?
The TC-W3 rating.
The ammonia odor of hydrazine, (organic nitrogen compounds). Common to many ash less synthetic oils.
There is a fair amount of ash less oils out there for 2 stroke dirt bikes.
The new dominator does not have a TC W3 rating nor the hydrazine smell and it just carries a FC rating so my guess is it does have low ash detergent dispersants in it.