Drilling out stock muffler - GL1800Riders

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post #1 of 146 (permalink) Old 09-18-2008, 11:28 AM Thread Starter
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Drilling out stock muffler

Has anyone done this? I heard that you can remove the tips and drill out the muffler using a 1/2" drill that lines up with the outer two holes in the tips. I ride an 04 GL1800 and was thinking of upgrading my exhaust ,but if this will give me the sound im looking for at no cost ,great. Thanks
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post #2 of 146 (permalink) Old 09-18-2008, 11:52 AM
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Re: Drilling out stock muffler

Rocket,

I doubt that you will get the results that you are looking for. If you want a deep throaty rumble, you are going to have to purchase a V-Twin.

I have seen quite a few butcher jobs come into my shop, where the owner is looking for a used set of OEM pipes for replacement.

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post #3 of 146 (permalink) Old 09-18-2008, 01:56 PM
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Re: Drilling out stock muffler

I drilled three 1/2" holes in the end of my mufflers (one on each side and one on top) when I put turndowns on mine. Changed the sound to just right for me, now I have three other wings to do, guess my buddies like it too.

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post #4 of 146 (permalink) Old 09-18-2008, 02:30 PM
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Re: Drilling out stock muffler

Yes it can be done
Don't do 2 1 inch hole though
Well you can, This is what I did, I ended up covering one of the holes. Then after riding a while, I'm back to them both being covered.
But the second Hole I can uncover in a few Minutes if I desire some sound.
It s a Bit Droney on the highway.

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post #5 of 146 (permalink) Old 09-18-2008, 02:56 PM
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Re: Drilling out stock muffler

I did this a few years ago using a then "new" product from the Pak-It Rak folks, I think they called it "Dial-A-Tone" or something like that. I don't know if they still sell them or not.

http://www.pakitrak.com/

They provide a template/adjustable baffle.You drill some holes in the end of your mufflers and attach the baffles. You can then rotate the baffle to adjust the size of the holes you just drilled, thus giving you anywhere from OEM quite to "Geeez, what kind of exhaust do you have on that thing!" settings.

I liked the sound produced with full open, (BTW I don't think anyone does this type of modification expecting it to "Sound Like A Harley", That is just stupid, It's a 6 cylinder for Christ's sake!). I did not like the drone produced at Highway speeds. I eventually switched to a complete Torqmaster Muffler and Loopz exhaust system, I'm very happy with that setup!


Stock muffler with exhaust tip removed.

Template/Baffle taped in place to drill pilot holes.

Retain screws in place. These can be loosened to rotate the baffle and adjust the "tone" of the muffler.

All seven pilot holes drilled, (use good drill bit, those mufflers are made of high quality steel, stainless I think!)

Drilling is finished on Muffler, larger holes are 3/8" if I recall correctly.

Installed baffle after removing "knock-outs" that where used as a template.
Then just reinstall your exhaust tips.I had Turndowns and was able to adjust the baffles without removing the exhaust tip.

Bike was not extremely noisy, but it did turn heads at 100% open, Highway drone noise was more tolerable at 50% open but I still didn't like it on longer trips, was fun as all heck around town though!

Like I said I eventually switched to Torqmaster mufflers, but the baffles were certainly a cheap way to find out if I even liked a more open sound and even how open I may like it. With the baffles fully closed the bike was as quiet as OEM.

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post #6 of 146 (permalink) Old 09-18-2008, 05:41 PM
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Re: Drilling out stock muffler

You want LOUD buy a HARLEY. There you will be accepted.

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post #7 of 146 (permalink) Old 09-18-2008, 07:05 PM
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Re: Drilling out stock muffler

Quote:
Originally Posted by laen
You want LOUD buy a HARLEY. There you will be accepted.
Buying a Harley with factory stock pipes does not equate to loud. It is only loud when the factory pipes are replaced with aftermarket items.
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post #8 of 146 (permalink) Old 09-18-2008, 07:38 PM
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Re: Drilling out stock muffler

Quote:
Originally Posted by rocket47
Has anyone done this? I heard that you can remove the tips and drill out the muffler using a 1/2" drill that lines up with the outer two holes in the tips. I ride an 04 GL1800 and was thinking of upgrading my exhaust ,but if this will give me the sound im looking for at no cost ,great. Thanks
It could well void your engine warranty of you have an extended warranty.

Honda will use any excuse to void your warranty, and modifications to the engine or related systems would certainly apply.

IMHO, making your exhaust louder is not an "upgrade". It is a downgrade. Want noise?, get a Harley.
post #9 of 146 (permalink) Old 09-18-2008, 07:52 PM
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Re: Drilling out stock muffler

Quote:
Originally Posted by leaddog11
Quote:
You want LOUD buy a HARLEY. There you will be accepted.
That was really not necessary. That was not what he ask!!!!!!!!!!
He is accepted here without a problem.
+1 it's your bike, lets ride.....

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post #10 of 146 (permalink) Old 09-18-2008, 08:47 PM
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Re: Drilling out stock muffler

I'm surprise the noise Nazi's too this long to get here
They must have been taking a Nap.

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No Helmet wearing , Smoking, Drinking, Loud pipe, No Chrome, Radar Detector watching, Crush washer reusing Goldwing Rider.
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