Can any 1 tell me if it voids the  warranty, runs like shit, or just is not good to block up the ballance tube holes in the slip on mufflers (SE) exaust? what does it do it must weigh a tone!!!

I did try a shit slip on when i fist got the bike what im sort of thinkin was at idle it ran really lumpy and sounded good but did pop back alot, I spose if its not broken dont fix it, I carn't see any ballance tubes on pipes like vance & hinz short shots they seem to idle nice and lunpy maybe just get some cams down the track and do it properly cheers for reply Pizzlin.