My RB S7 seems to be acting strange all of a sudden im still in break in I've had about 7 tanks through her well here it goes whenever I try to go past not even half throttle it keeps cutting out for some reason I've been leaning it out(not alot but just enough to where it shouldn't cut out) trying to prevent it from cutting out but it still does im thinking theres an air leak or something. Im not sure though but when I put my finger over the exaust stinger to prime the engine on the starter box it primes the fuel but after I remove my finger the fuel goes back about half an inch or 1 inch down the fuel line again. I'm going to seal my engine again to make sure. I'm using a motorsaver airfilter and a ofna pipe on it http://www2.towerhobbies.com/cgi-bin/WTI0001P?&I=LXCWH0 When I first got the pipe I had to drill a hole through the stinger because it was blocked so I doubt that would have any affect on it but I just felt like yall should know. Any suggestions are welcome.

Oh and I left out when I opened my engine up a few days ago I found some dirt in the engine which really pi$$ed me off because I only had about 4 tanks through the engine I dont know how that much dirt got through my filter with a motorsaver on but I quickly cleaned my airfilter and the engine and polished it so its clean again Im thinkin that had somethin to do with my engine but yet im still not sure.