YES! with any go engine, you may need to turn in the hsn some,but not much. Always do the lsn to make any major adjustments as far as fuel rich or lean. It's like they tune ass backwards from what your use to. I have an axial 28rr that once you set the lsn and idle, then you just adj. the hsn. It's a bitch to get the hang of.But once you do then it's just ask mark,grizz,racer22 they will tell you off the top of their heads if your screwing up and where. I down loaded and made a whole folder just for tuning reference for the go-tec's. One last tip, if you think it's the engine,it probably is not. I have only had 2 engine related problems that were not my mistake. And they were one air leak around the pinch bolt that holds carb in place. the other was air leak from needle seals. Oh and one more, the fuel filter had an air leak. Other then that unless I muffed it up ,no engine problems. I am surprised that for the price and the performance that these are not the second most popular engines made. #1 would be the mg66 hands down! Every one has always pissed and moaned about how bad the carbs are and they won't hold a tune,go-tec's don't last,they are cheap tiwanni engines. I say;learn to read and comprehend! So read,take your time,make sure the engine is fully warmed up[2-3 tanks] and this engine will not let you down.