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20T exhaust pipe

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20T exhaust pipe

Post  rob spence on Sat Oct 07, 2017 12:21 pm

I don't seem to be able to find any info on how the exhaust manifold to head clamp works on the AMC 20T...I see they have a finned clamp and one bolt on the head ( but can't find any details). thanks rob.

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Exhaist on 20T

Post  piston 197 on Sat Oct 07, 2017 1:24 pm

The exhaust on a 20T just pushes into the cylinder and is held by a single bolt that goes through the tab welded onto the exhaust pipe, there is no finned clamp ( nor anything to clamp to) if someone has used a finned clamp it will be just to dress it up, there is no need for it and it is not a standard fitment
JH
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Re: 20T exhaust pipe

Post  rob spence on Sun Oct 08, 2017 5:54 pm

Thanks JH...I was going off this photo which seem to have finned clamps fitted.

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Photo ?

Post  piston 197 on Sun Oct 08, 2017 7:24 pm

Can't see a photo, but are you sure it is a 20T ?? as only the  AMC 25T/25C/25S, 250cc engine has a threaded exhaust collar to attach the exhaust ( obviously the Villiers ones do as well before someone points that out, but we are talking AMC here.
Picture has now just appeared, this is a 250cc not a 20T it is one of the works factory bikes

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Re: 20T exhaust pipe

Post  FB vincent on Sun Oct 08, 2017 7:27 pm

Your photo is of the AMC 25T engine which did indeed have a threaded exhaust fitting, unlike the 17T and 20T engine which has the fitting as described.

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Re: 20T exhaust pipe

Post  rob spence on Sun Oct 08, 2017 7:41 pm

Thanks that explains all !

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