Somebody has to be the guinea pig. I purchased a TMM-106 twin. Never heard of this engine and really had my doubts, but this thing is a beast. It hand started right out of the box and throttle response is great. I've got about 4 gallons thru it now and it does'nt miss a beat. Swings a 26X10 Xoar WWI Simitar at 6800 on the stock supplied mufflers, fairly quiet too for an over 100cc engine, so you just never know.