Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: IronJimCb on June 20, 2016, 10:51:10 AM

Title: Vacuume sync
Post by: IronJimCb on June 20, 2016, 10:51:10 AM

Hi guys

When performing a vacuume sync is there any particular order that cylinders need to be adjusted in ?

Thanks in advance

If you've never owned one you'll never understand

CB400F

Title: Re: Vacuume sync
Post by: ginger_jim on June 21, 2016, 08:18:16 AM

I certainly cant see why you would have to adjust in any order....the important thing is to have the same readings for the four pots.  Do you have a un-adjustable slide (carb number 2 on the later 750's) as a guide?

Title: Re: Vacuume sync
Post by: IronJimCb on June 21, 2016, 08:20:51 AM

No all carbs are adjustable I was just curious to know if there was a certain way it was done

If you've never owned one you'll never understand

CB400F

Title: Re: Vacuume sync
Post by: gtmdriver on June 21, 2016, 09:09:00 AM

Not really any particular order.

What you will probably find is that 2 or 3 of the cylinders are very close together so then you just adjust the others to the same value.

Title: Re: Vacuume sync
Post by: Dave_Canada on June 21, 2016, 03:47:43 PM

You want to keep the same average position of the slides, I recommend leaving one (whichever is hardest to get at) untouched. If you change them all, the choke throttle advance will be messed up. Go way overboard changing them all and the idle screw travel may run out as well.