I always thought when there is no pinch with glow plug out it is properly brok in and ready to race. I personnaly think u are fine. the 2.5 is hard to tune but once u get used to it, it works fine. I had mine repinched and it came back with way more power than what it went in with. same rod, carb and everything. the only thing I did was have it repinched. costs 15 bucks great deal. when the motor does give out give it a try. save 100 bucks from getting a whole new engine. 2.5 has power just hard to tune.