Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: JustcallmeMrT on February 15, 2015, 04:50:17 PM

Title: Intake differences - which to use?
Post by: JustcallmeMrT on February 15, 2015, 04:50:17 PM

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? 
(http://tapatalk.imageshack.com/v2/15/02/15/8235c30ee69a3ee3a85e6a17073af350.jpg)
(http://tapatalk.imageshack.com/v2/15/02/15/aba745ff3986740c47a7851e9fe42ae8.jpg)

Title: Re: Intake differences - which to use?
Post by: hairygit on February 15, 2015, 04:55:11 PM

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

Title: Re: Intake differences - which to use?
Post by: JustcallmeMrT on February 15, 2015, 05:16:40 PM

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!:))

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

Title: Re: Intake differences - which to use?
Post by: hunterso on February 15, 2015, 05:42:05 PM

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)

Title: Re: Intake differences - which to use?
Post by: Bryanj on February 15, 2015, 06:02:14 PM

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

Title: Re: Intake differences - which to use?
Post by: JustcallmeMrT on February 16, 2015, 08:49:57 PM

Quote from: hunterso on February 15, 2015, 05:42:05 PM

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)

Thanks for the info.  The intakes that came off my carbs have the synch ports, so I'll be using those.  What a learning curve this all is!

Title: Re: Intake differences - which to use?
Post by: Norniron on February 16, 2015, 10:23:09 PM

Quote from: JustcallmeMrT on February 16, 2015, 08:49:57 PM

Quote from: hunterso on February 15, 2015, 05:42:05 PM

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)

Thanks for the info.  The intakes that came off my carbs have the synch ports, so I'll be using those.  What a learning curve this all is!

Good choice T