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General Category >> Rubber Side Down! >> Holes in Baffle affect gas mileage?
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Message started by guitarsr4girls2 on 01/30/06 at 14:05:15

Title: Holes in Baffle affect gas mileage?
Post by guitarsr4girls2 on 01/30/06 at 14:05:15

Hey, if I drilled holes in the baffle of the stock muffler, would that have any affect (worsen) my gas mileage if I didn't re-jet or drop a new carb in, basically if I left everything else stock?

Title: Re: Holes in Baffle affect gas mileage?
Post by shawn_b on 01/31/06 at 12:29:58

i did it and nothing changed so far it 8)

shawn

Title: Re: Holes in Baffle affect gas mileage?
Post by slavy on 01/31/06 at 16:25:23

Depends how many and how big holes. If You don't touch the carb, there is not going to be significant difference in the gas milage, but Why make leaner already lean running bike? If You don't have backfiring now, You might get it. If You don't like the stock muffler, buy Yourself some HD exhaust for cheap and install it. If You like it better, sell Your exhaust on eBay and You will make money. If You don't like it- You can always go back. Once You drill holes, You get something,that You can not even sell. How do You know how many and what size holes to drill?

Title: Re: Holes in Baffle affect gas mileage?
Post by shawn_b on 01/31/06 at 20:20:16

i drilled 2x i dont know what bit size off hand not very big though when u say lean whats lean gas or air

shawn

Title: Re: Holes in Baffle affect gas mileage?
Post by Savage_Rob on 01/31/06 at 20:21:57

shawn_b wrote:

i drilled 2x i dont know what bit size off hand not very big though when u say lean whats lean gas or air

shawn

Lean and rich both refer to the fuel/air mixture. Lean is too much air (or too little fuel) while rich is too much fuel (or too little air).

He's saying that drilling holes is likely to increase airflow, making the mixture leaner... and the bike is already quite lean when stock.

Title: Re: Holes in Baffle affect gas mileage?
Post by shawn_b on 01/31/06 at 20:46:19

oh ok ;D