How is the exhaust downpipe fastened on?

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How is the exhaust downpipe fastened on?

Postby clanger9 » Fri Jul 10, 2015 5:19 pm

Quick question:

There is a fixing boss on the exhaust downpipe under the engine, but it doesn't seem to line up with any obvious fixing point.

Image

Is there supposed to be some sort of fixing bracket under there? There's nothing obvious on my bike (the exhaust is currently held on with a bodged clip further back that I want to get rid of...)
1966 AJS Model 14 250 CSR "cafe racer"
1993 Ducati 750SS

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Re: How is the exhaust downpipe fastened on?

Postby Janet » Fri Jul 10, 2015 5:47 pm

Mine has a cranked bracket but I don't know if it's the correct one. My exhaust isn't exactly original (except for the rust from the original oxidised metal ).
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Re: How is the exhaust downpipe fastened on?

Postby clanger9 » Fri Jul 10, 2015 5:54 pm

Janet wrote:Mine has a cranked bracket but I don't know if it's the correct one. My exhaust isn't exactly original (except for the rust from the original oxidised metal ).


Perfect, ta! :beer:

I figure I can make something like that. I got a nice, shiny new downpipe from Armour's so I wanted to fit the new one properly. It just seemed odd that the boss is welded on to the exhaust in a way that doesn't line up with anything obvious...
1966 AJS Model 14 250 CSR "cafe racer"
1993 Ducati 750SS

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Re: How is the exhaust downpipe fastened on?

Postby Janet » Fri Jul 10, 2015 6:58 pm

Perhaps it's to give some flexibility between the vibrating engine at the head and the frame where the pipe fits.
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Re: How is the exhaust downpipe fastened on?

Postby Rob Harknett » Fri Jul 10, 2015 7:02 pm

For what its worth, the bracket is pt. no. 042541, perhaps Russell Motors have one. I could have a look and measure mine, should not be too difficult to bend something up.

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Re: How is the exhaust downpipe fastened on?

Postby clanger9 » Fri Jul 10, 2015 8:21 pm

Aha, I think I found something in the "mystery box o' bits":

Image

I think that might be the right part (it looks like it should fit). Thanks for all the help!
1966 AJS Model 14 250 CSR "cafe racer"
1993 Ducati 750SS

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Re: How is the exhaust downpipe fastened on?

Postby SideValve » Fri Jul 10, 2015 10:37 pm

WP_20150710_006.jpg

If it helps here is mine in situ. You can see why it hasn't rusted away in 56 years :¬)
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