Triumphrat

06-27-2006

I have read several posts about drillingout the stock mufflers on a bonnie. As Im not to familiar with what actually is in that muffler, just to confirm I can shove a 3/4 inch drill bit into the opening in the end of my stock pea shooter pipe and drill out a hole which will increase the sound of my pipes?

mecscc · 06-27-2006

Look at the thread down the page of "Bafflectomy." It answers some of your questions. Also, there is another thread with pictures, step by step. Maybe whoever did that one will point you to it.

Meanwhile, search the site for bafflectomy and see what you come up with.

I haven't done it but I believe Dr.J said it was an 1 1/4" steel cutting bit.

Monte

Loxpump · 06-27-2006

!-1/4" hole saw will cut the end of the rear baffle, the a socket and hammer will break loose the tack welds that holds it in at the front. Then pull it out, it's about 6" or so long and wrapped with fiberglass packing. Then you can drill holes through the front baffle if you want more noise. Like Monte said there is a great post with pics that helped me do mine.

SCCTrim · 06-27-2006

My experience with this was....less than swell

I found the 1 1/4 holesaw to be too large....out of frustration I punched a hole the the rear baffle with a long extension to a socket

It only made the tone a little deeper, no louder. I like a loud bike, and bought a set of specialty spares headers with mega slip'ons.

The bike sounds awesome now.

SC

CAPTDON · 06-27-2006

Like some one said go down the page a little its all there!! Good luck- You wont regret it!!

doctorjay · 06-27-2006

1) the link is found by reading a sept '05 threads by Carls and kdlutes.
2) You need alot more than sticking a drill in the muffler. Its not too hard but you need equipment.
3) I had my bike secured on a bike lift.
4) The hole bit is a metal cutting door bit 1 1/8 in size and then you need to cut the back baffle with a 1/4 inch metal cutting bit at least 12 inches long. good pliers and a good electric drill
5) When done I think it sounds great.

Hope this helps

BillT100 · 06-27-2006

You could drill through the internal baffles with a 3/4" drill bit without removing the rear baffle first. I didn't do it this way but it may be better in that it would keep your drill bit in alignment all the way through all the internal baffles, 5 or 6, don't remember.

After doing it this way then you could drill out the rear baffle with a 1 1/4" metal hole saw. In order to get the benefit of alignment from the rear baffle tube you would of course have to have a 3/4" shank all the way on your drill bit. It could be turned down at the end at a machine shop to fit a 1/2" or 3/8" drill. If I remember correctly the bit needs to be 26" long.

I would go up one size on your main jets and add 1/4 turn out on your pilot screws.

Bill

doctorjay · 06-27-2006

Your right on Bill but the 1 1/4 hole saw was too big and a 1 1/8 metal door hole saw worked better. Where is that pilot screw? Is it the one I'm seeing on the outside of the carbs and which way do I turn it. If its inside, I'm going to wait until I re-jet. If you leave the rear baffle and drill out the inside ones with a long long bit, would that sound the same as taking the rear baffle out? I haven't heard that proposed before...Either way mines out and finished

BillT100 · 06-27-2006

Quote:

On 2006-06-27 20:01, doctorjay wrote:
Your right on Bill but the 1 1/4 hole saw was too big and a 1 1/8 metal door hole saw worked better. Where is that pilot screw? Is it the one I'm seeing on the outside of the carbs and which way do I turn it. If its inside, I'm going to wait until I re-jet. If you leave the rear baffle and drill out the inside ones with a long long bit, would that sound the same as taking the rear baffle out? I haven't heard that proposed before...Either way mines out and finished

You can find a picture of the carb on page 9 of this PDF file: Carb Tuning

Looking at the pilot screw you turn counter clockwise to go richer. Your pilot screw should be "D" shaped on your 06 T100. I never had trouble using a 1 1/4" hole saw to remove the rear baffle but my bike is an 03 and there could be differences in the
mufflers.

If you only removed the rear baffle on your bike you may not have to rejet but I would go out about a 1/4 turn on the pilot screws. If you remove the rear baffle and drill through all the internal baffles I would go up one size on the main jets. If you only removed the rear baffle and you like the way your bike sounds, you could leave well enough alone.

Drilling the internal baffles but leaving the rear baffle in place still restricts the exhaust exit to a 3/4" tube but I have heard of a couple of people doing that.

Bill

[ This message was edited by: BillT100 on 2006-06-27 20:37 ]

derek985 · 06-27-2006

Not to be a PITA but this is a perfect example of why we should use the WIKI more often - and guess what? The bafflectomy article already exists there!

wiki.triumphrat.net/RemovingBaffles

D.