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General Category >> Rubber Side Down! >> Muffler Mod
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Message started by Krowl on 05/24/10 at 05:45:43

Title: Muffler Mod
Post by Krowl on 05/24/10 at 05:45:43

So I tried to be cheap and wanted a different sound without spending any money. I drilled 4 13/64 inch holes in the back muffler to give it a little voice. Now she pops and backfires a little when cruising and I let off the throttle. Everything was fine before this. Any suggestions as to why now?!
I already did the 1/2 spacer mod before all of this. I'm I running to rich now?! Any help would be appreciated! :-X

Title: Re: Muffler Mod
Post by verslagen1 on 05/24/10 at 07:06:23

how does your sparky look?
how much soot out the back?
do you have leaks at the header or muff?

Title: Re: Muffler Mod
Post by Krowl on 05/24/10 at 09:55:38

New spark plug and there is no soot coming from the back. I just wonder why 4 holes in the muffler would cause this problem.

Title: Re: Muffler Mod
Post by bill67 on 05/24/10 at 10:09:05

It wouldn't make you run richer,the stock pipe made the backfire quieter.

Title: Re: Muffler Mod
Post by thumperclone on 05/24/10 at 15:54:47

more holes= less back pressure = leaner
have you looked at your new plug since drillin?
your electrode color will tell ya if your lean(my bet) or rich..then go to tech section and look up basic carb tuning(thanks to lancer!)

Title: Re: Muffler Mod
Post by Routy on 05/24/10 at 18:45:31

Drilling 8 holes in mine never changed much, except the exhaust is a little louder, and the backfiring is maybe a touch louder too. Mine always did backfire on decelleration,.....I consider it kinda normal.

Title: Re: Muffler Mod
Post by Rogue_Cheddar on 05/24/10 at 18:54:22

The backfire saved my life once, makes a dandy deer repellant! :D