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Late M21 longer intake manifold?

I see in pictures that the later bikes (1955 and newer it appears????) had an extended carburetor intake manifold. Any advantages to this other than preventing the fuel boiling in hot weather (which mine does)?

Re: Late M21 longer intake manifold?

I have got a longer intake on my M21 so that the monobloc carb clears the magdyno.
Cheers
Pete

email (option): petercomley@web.de

Re: Late M21 longer intake manifold?

Back in the day I had one with an extra long intake. It went like stink.

email (option): jeremy@clogmaker.co.uk

Re: Late M21 longer intake manifold?

Side valves do seem to breathe better with a long intake tract and yes longer = cooler
Cooler = more fuel

email (option): bsansw1@tpg.com.au

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