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Post by christer on Sept 7, 2006 13:55:20 GMT -5
I rebuilding/restoring a '78 SR on a tight budget. Would it be possible to modify the original exahaust to make the bike breath a little easier. A friend of my have put on a BSA Goldstar "muffler", with great success. I'm thinking: cut of the box on the innerside of the muffler and weld the hole, make the muffler shorter, cutting of the cowl at the back and weld it back on, maybe get rid of the interior, or some of it. Maybe a stupid question, but I give it a try. Christer  |
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Post by StewRoss on Sept 7, 2006 17:49:00 GMT -5
Hi Christer, One of my SR's came with the pipe modified like that...more or less. The box was gone and plated over; the end was still intact but the centre tube had been removed. It had a centre similar to a Conti in some ways...sounded a little better than standard, and seemed to go a little better. It was also lighter of course. I'd say that it'd take a bit of effort to remove the centre pipe and you may need to make some extra internal holes where the box comes off...just guessing here. If you cut and shut the back end though the chrome will probably look a bit rough?? SR  |
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Post by StewRoss on Sept 7, 2006 17:53:32 GMT -5
...one other thing of course...you are able to buy Dunstall replica mufflers for a fairly cheap price around the place, perhaps e-bay...saves ruining the standard pipe if you ever need to quieten it down again for some reason?
These are fairly easily mounted and look pretty good..shorter than standard...
SR
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Post by christer on Sept 8, 2006 1:38:03 GMT -5
Thank you.
The chrome will certainly be gone in the spots where I'm gonna
weld it. Thinking of painting the muffler black...
Have finally got the bike home, and can start the build up. All
the tinware will be sanded and primed this weekend. The frame
and wheels are in nice shape, so they will be left as is. I am
satisfied with the overall condition of the bike. Nice that all the
parts are there, very much unlike the BSA I restored a few years
ago.
Thank you for the help so far.
Christer
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Post by miker on Sept 10, 2006 19:47:09 GMT -5
I'm running the Dunstall and love the sound. Can't comment to performance gain, since I've never had a stock muffler on.
miker
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Post by christer on Sept 12, 2006 14:53:07 GMT -5
Hi.
I did it ;D
Chopped off the lunchbox, cut of about 10 cm of the rear end
of the silencer, also cut of the cowl, which will be welded back
on. I'm gonna patch in a sheet over the hole where the box was.
Inside the can is now one pipe merging into three smaller ones
at the rear. Reckon it's gonna be loud...I certainly gonna meet
some challenges with carburation/air filter, but I'm gonna give it
a try.
Christer
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Post by StewRoss on Sept 13, 2006 6:35:14 GMT -5
Hi, Send us a pic when you're done...Christer. SR  |
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Post by christer on Sept 13, 2006 13:20:28 GMT -5
Hi.
I will certainly post pictures, but I have yet to figure out how.
Christer
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Post by G Man on Sept 13, 2006 14:44:27 GMT -5
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Post by christer on Sept 19, 2006 15:06:20 GMT -5
Hi!! Have made a website......pictures of the chopped up exhaust to be found. home.online.no/~cfolke/Would like pictures of your bikes to have on my site. Christer |
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Post by StewRoss on Sept 20, 2006 2:28:49 GMT -5
Hi Christer, Nice site. I'll send a couple of pics to you if you want them. SR |
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Post by christer on Sept 20, 2006 6:40:33 GMT -5
HI! Yes! Please send photos, and specs too if you want. I would be very pleased if you good people could send me photos of your bikes. Maybe I could present them nicely, for everyones amusement and pleasure. Thanks Christer |
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Post by robomod on Oct 14, 2006 17:15:51 GMT -5
 Not the prettiest pipe, but the "fried-egg" cut tip makes me feel like I'm cruising a P41. |
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Post by christer on Oct 15, 2006 3:49:32 GMT -5
Hi. Like the look of your exhaust. Have welded mine back together and painted it black....real homebrew look, but it will do for now. Send me pictures of your bike so I can post it on my website. home.online.no/~cfolkeChrister |
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Post by christer on Oct 17, 2006 13:16:36 GMT -5
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