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350/450 Carb Swap

60281 Views 7 Replies 3 Participants Last post by  oldskool
Can't remember exactly who it was that was trying to use 450 carbs on a 350.
Here's a bit of info that may help renew your interest.

As I recall, the problem was that the carbs ended up running into the frame tube??

I was just in the shop and discovered that the CB400 Twin carb manifolds (from the later SOHC twins) fit nicely on the older 450 DOHC carbs, and they have a slight "angle" or tilt to them, which may be enough to allow them to clear your 350 frame downtube. Probably the same part as the 450 SOHC twins and Hawks, too.
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Don't get dangerously excited now - all I know for sure is that they seem to fit on 450 carbs ok.
Not sure how well they'll fit up to a 350 head - I don't have one to try on.

Let me poke around tomorrow and see if I can find both of them out there in that mess I call a shop.
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