yeah just thin it down with sand paper and make sure it is balanced.
I did mean carb.
Knife edge con rod:
Stock (yours):
http://www3.towerhobbies.com/cgi-bin...?&I=LXUP79&P=7
Looks something like that.
Knife edge:
http://www3.towerhobbies.com/cgi-bin...?&I=LXLBU5&P=7
http://www3.towerhobbies.com/cgi-bin...?&I=LXLBV8&P=7
http://www3.towerhobbies.com/cgi-bin...?&I=LXLDG8&P=7
It reduces the rotational resistance inside the engine and can significantly increase engine rpm's.
Att you have to do is sharped each edge and maybe thin it out a little.