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Matchless g12 Exhaust

Matchless g12 Exhaust

Postby 88chips » Sun Jan 11, 2015 5:37 pm

Hi Everyone,
I have a G12 with 2 into 1 exhaust ,A new system
but the left hand engine pipe keeps coming out .
The old system had a piece of wire tied around the pipe and
the down tube of the frame.
Is there a better way to stop the pipe from coming out.
Cheers Steve AU.

88chips
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Joined: Mon Nov 03, 2014 2:19 pm

Re: Matchless g12 Exhaust

Postby BillT » Thu Jan 29, 2015 7:09 pm

Is this pipe a copy of the G12CSR exhaust, say a model circa 1960? I don't know much about them but I think the left side crossed in front of the downtubes and clamped into a 'Y' on the right side. if the clamps are all tight and everything is properly aligned, the exhaust should be tight.

I've helped on a couple of 2-into-1 and a few 3-into-4-into-2 (Tridents), and the trick is to assemble everything loose, make sure the exhausts are home in their ports with the help of a leather or rubber mallet, and then tighten everything, front to back.

A slight mis-bend on a reproduction pipe can make the job a nightmare. I've had to tweak the pipes on 3 of my bikes to get everything to work, and those are all simple straight-run dual exhaust, but also all reproductions.

The 4th bike still has its original exhaust.
'73 Norton 850 Commando - 3030xx
'69 Norton Ranger 750 - P11/1289xx
'67 Matchless G15CS - G15CS/1235xx
'61 Matchless G80CS - 61/G80CS/41xx
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BillT
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Location: Broward County, Florida


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