yamaha 225 exhaust popping

[hntr58]

I put a DG pipe on my Yamaha 225 and after installing it and rejetting to the next size pilot and main jet it pops out of the exhaust quite a bit when I let off the throttle. I went to the next size up on the two jets but it seems to be running too rich now. Is this normal or do I need to try something else? The bike seems to be running good except for that. Thanks

[edog]

Running rich.

[hntr58]

ok but just for the heck of it I put the stock jetting back in and it still pops so, I don't get it

[atckowalski]

Try checking the intake (air) boot for a leak?