Ok guys, I just got done running mt GT2 with the stock engine installed. After about 10 minutes of driving, I heard something that sounded almost like air escaping. Does anyone know what could be the problem.

did the performance change at all?

was your plug tight, and was the cooling head on tight?

is the idle ok? if not check your carb. also, check the exhaust coupling and line headin from your pipe to gas tank. check the gas tank too

im assuming you heard this after the motor was shut off, when i get done running after a while i can hear what sounds like air coming out of the pipe...i think its just back pressure from the pipe....that might be what you are hearing

Try sealing your engine and checking to see if it goes away.

Here's the how-to that I followed: http://www.savage-central.com/module...wtopic&t=54465

Ok thanks guys.