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Twins Technical Talk Technical Talk for Hinckley Triumph Twins: Bonneville, T100, Speedmaster, America, Thruxton, and Scrambler.

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Old 09-07-2006, 01:19 AM   #1 (permalink)
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I've done the bafflectomy and drilled through the internal baffles but have always wondered what is inside. Well here it is. I had an old set off my 2002 Bonneville that were of no use so I ripped one of them down the middle to have a look.

1st. picture before:



Don't look any further if you are at all squeamish at the sight of rust and fiberglass.





















Now I know why they are so quiet. The exhaust has to goes through a maze of 5 chambers and baffles.
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Old 09-07-2006, 03:38 AM   #2 (permalink)
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Now that answers a lot of questions. Great photos that will most likely stop the need to for any more baffle removal posts. You should be congratulated.
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Old 09-07-2006, 05:32 AM   #3 (permalink)
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Ya shudda been a surgeon! These photos could be the supporting visuals for a thesis on bafflectomies. Or something ............

Good job!

Bob
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Old 09-07-2006, 05:47 AM   #4 (permalink)
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Fantastic work.
Questions...
At the inlet end, the tube inlet almost looks shiney. Is it just the photo or is there something in that first inlet tube?
What are the two round "bosses" I see in the 2nd expansion chamber? (I'm assuming they are for the mounting bracket bolts)
I wonder why the middle "baffle" has the "Y" type arrangement and why would they do it perpendicular to the rest of the baffle?
Thanks very much for the time spent showing us this.
Colin
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Old 09-07-2006, 06:48 AM   #5 (permalink)
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Some of the pictures were taken after I tried to clean off some of the black carbon with brake cleaner. It was just still wet. When I was taking the pictures they looked all black on my cameras little screen, so I thought it needed some contrast to show up better. I saw that "Y" in the one pipe also. Not sure about that either. It still ends up being basically about a three quarter inch pipe for the exhaust to flow through. And the two bumps are covering the nuts that are welded on the inside for the bracket bolts. Which was a problem when I took these off. One of the bolts was rusted on so bad that it broke the weld loose on the inside of the muffler and I had to grind off the head of the bolt to remove the bracket. It happened on both mufflers.
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Old 09-07-2006, 07:14 AM   #6 (permalink)
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Great pictures, thanks!
I've wanted to do the basic baffelectomy, but hesitated as I couldn't see exactly what I would be bashing even with the good baffelectomy pics. Your pictures cleared all that up.

Great job, thanks again!

Dennis
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Old 09-07-2006, 07:28 AM   #7 (permalink)
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Good work! No wonder they are so restrictive. Glad mine are in a box, not on the bike...
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Old 09-07-2006, 08:50 AM   #8 (permalink)
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Wow. No wonder they make the bike sound like a sewing machine.

I wonder what TORs look like inside. Maybe I'll cut mine open when I've replaced them (they're rusting anyway, so no point in reselling).

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Old 09-07-2006, 09:26 AM   #9 (permalink)
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Mark, It would be a good comparison. Don't they look about the same, size and shape wise? It was really easy to do, just need a band saw with a metal cutting blade.
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Old 09-07-2006, 09:47 AM   #10 (permalink)
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Ah! Very ccol, Lox! I always wondered what went on in there.

How bout a cut-away of your engine next? :
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