RE: Connecting rod Bushing
I run my SuperTigre 51 and 90 at 16:1 using Redline Two Stroke Racing synthetic and on the 51 I have gotten over 35 hours on a single RimFire 1/4X32 plug. The 51 has over 75 hours and still runs strong, the 90 has about 10 hours and runs great as well. Both were converted using CH synchrospark ignitions, the 51 still uses the glow carb albeit somewhat modified and the 90 has a walbro on it.