SOHC.co.uk Forums > CB500/550

Intake differences - which to use?

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JustcallmeMrT:
I've got three engines sitting here by now, and two have intakes with a screw/port in the side, and one doesn't.   Wondering which I should use in the current build.  Which is best? 

hairygit:
Those screws/ports are where you attach vacuum gauges to synchronise the carbs, use those!:))

JustcallmeMrT:

--- Quote from: hairygit on February 15, 2015, 04:55:11 PM ---Those screws/ports are where you attach vacuum gauges to synchronise the carbs, use those!:))

--- End quote ---
Confirmed what I thought.  Unfortunately those are in worse shape - time for more prep and paint!

hunterso:
The ports you use will depend on which type of carbs you have.

The PD46 carbs have their own sync ports so you will use the intakes without.
If you have the other carbs (without the sync ports) you will need the intakes with the ports.

Check your carbs - good luck - you seem to be storming on with your project  8)

Bryanj:
Not only that but he rubbers and spacings are different. decide which carbs thaen you have to use the manifolds to suit

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