SOHC.co.uk Forums > CB750

twin 40's on a 750

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haynes66:
having been a big rally fan in the 70's i was intrigued to see a pic of a 750 fitted with a pair of weber DCOE 40 carbs which i assumed were only fitted to cars. anyone ever fitted some to theirs? according to google it seems to have been a common mod on 750 drag bikes. looks interesting though.

wolfheze:
Had  twin 40s on my Talbot Sunbeam Ti but never heard of them on a bike. Imagine it wouldn't be great around town  ???

K2-K6:
I've seen them in the past more in American bike mags of that era, they do look quite good.

As far as I can remember they had a bespoke cast alloy manifold to mount them to but other than that it must just be setup as I know you can change the venturi size for your specific application. They are also normally mounted with a o-ring type seal and clamped with a thackery?  type washer to avoid transmitting engine vibrations to the carbs as I understand it.

Haynes, you live in the right area to see rally stages I guess, I've spent many an hour years ago watching rally cars in Welsh forests.

Wolfeze, those talbots were quite a quick car and handled well too, I navigated on a couple of tarmac rally events in one some time ago.

wolfheze:
Sunbeam was a great car.Appalling build quality and tinworm but still a great car. Aspired to a sunbeam lotus but they were far too expensive for a 23 year old.

Rozabikes Tim:
Just googled this out of interest and fair bit on sister US SOHC site.

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