I just put my Big Gun Exhaust back on with my dyno jet kit. I have realized that it pops on decel and there seems to be a leak where the header goes into the motor. Any answers to my problems would be greatly appreciated.

 

If you had the big gun on there before didn't you rejet? Or did it run right? Or did you realize you needed to rejet and just use the stock muffler?

 

I had it on before, but I took it off so I would get less wheel spin in the snow. But now with the same jetting as before it has the above mentioned problems.

 

Well my dg backfires after letting off the throttle at high speed.I didn't even have to rejet after a fresh bore,uni filter,dg pipe,high comp piston but my plug has a good tan look to it and the engine doesn't overheat so i don't worry about it.