Re: 100:1 Mix
I've found Redline leaves reddish carbon deposits so it doesn't hurt to blow the motor out with a little water or Sea Foam cleaner or ATF (prolly the best on a smoker) to get the buildup out. We use seafoam or ATF on rotary engines running premix to get the red stuff out that eventually causes scoring wear inside.
I think all two stroke oils do it to an extent, and synthetics are better about buildup but it still happens somewhat. It can close up your squish ring and cause hot spots, so a smoky top end cleanout isn't a bad thing once in a while depending on use.
KTM50 Schwinn Chopper - 6000W E-Motard - 52cc Auger BMX - 9sp+CVT 52cc Cagllari Moped