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May 21, 2013, 8:49am

ScootDawg Scooter Forum :: The Garage :: 250cc Scooters and up.... :: Drilling the muffler end cap?

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Topic: Drilling the muffler end cap? (Read 556 times)

motomech
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Drilling the muffler end cap?
« Thread Started on Mar 27, 2008, 6:30am »

Common practice w/ motorcycle riders who want to add a little character to their ride.
The way I used to do it is to carefully mark off a circular pattern around the exh. outlet and then centerpunch evenly spaced six spots. Then drill six small holes(3/8th").
Better to start small and enlarge if more sound is desired.
If the airbox isn't changed, airflow though the engine isn't increased that much and installing a larger main jet is not required.
Seems to last longer than clipping baseball cards against the spokes.

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Motomech

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cat0020
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Re: Drilling the muffler end cap?
« Reply #1 on Mar 27, 2008, 7:47am »

Let us know the results when you get some test rides.

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earlwb
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Re: Drilling the muffler end cap?
« Reply #2 on Mar 27, 2008, 9:02am »

Ooohhh!!!!, clipping baseball cards against the spokes that brings back memories.
Not a bad idea actually. It doesn't cost anything if the cards aren't yours.

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motomech
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Re: Drilling the muffler end cap?
« Reply #3 on Mar 27, 2008, 11:12am »

Actually, I prefered ballons, for that deeper, V-twin sound.

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Motomech

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jjag
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Re: Drilling the muffler end cap?
« Reply #4 on Mar 27, 2008, 8:52pm »

hey motomech how much of a change in the sound of the muffler did it make and was it a noticeable difference

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motomech
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Re: Drilling the muffler end cap?
« Reply #5 on Mar 27, 2008, 9:58pm »

Sure it changes, it's just a matter of how big you want to make the holes. That's why I say start small and go progressively bigger till you get where you want to be.

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Motomech

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luciano136
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Re: Drilling the muffler end cap?
« Reply #6 on Mar 28, 2008, 12:12pm »

Quote:

Ooohhh!!!!, clipping baseball cards against the spokes that brings back memories.
Not a bad idea actually. It doesn't cost anything if the cards aren't yours.

No kidding! We did it on our bicycles

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cat0020
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Re: Drilling the muffler end cap?
« Reply #7 on Apr 7, 2008, 8:04am »

So, how did the drilling go? any difference in scooter performance?

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