Tarheel, on a optimax motor , you should have been using quick kleen at every fill up.
As far as decarbonizing 2 strokes. It recommended every spring. We use CRC Decarb an tune up , on all 2 strokes that come in at shop ( not opitmax's and yammy hpdi v- max) those motor shoot fuel in through the air injectors that's why they use kleen additives at every fill up.