SOHC.co.uk Forums > CB500/550

Stupid question of the day - PD carb balancing

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SPR:
Ok - so thanks to Ken I’ve a carbtune carb balancer and I’ve pipes / fittings on the way ....

All the videos I’ve seen show I presume the older carbs with the screw on the manifold and adjustment done via visible lock screws.

I don’t have either so am I right that the gauge connection is the screw in the picture and adjustment is under each carb top cap ?

Yep basic I know

Thanks

Simon

K2-K6:
Yes to both questions.

Should have carb number two as no adjustment/fixed as you balance all the others to this one as master.

SPR:

--- Quote from: K2-K6 on May 29, 2020, 01:50:52 PM ---Yes to both questions.

Should have carb number two as no adjustment/fixed as you balance all the others to this one as master.

--- End quote ---

Many thanks :)

keithtraffic:
Will be interesting to see how you get on with this.

I have just complete re-built my PD46 carbs - new just about everything! They are now back on the bike after a big struggle and  and it seems to run reasonably just after a static balance (setting all the throttle sliders to the same height), but I do want to balance them properly.

The info I have seen suggest that you should double check the timing and the valve clearances before trying to balance the carbs or else you may get misleading answers - would be interesting to see if those who actually have done it before really did go to this trouble first.

What vacuum gauges are you using - these are something I will have to get.

Nurse Julie:
There is no point in trying to balance the carbs unless the bike has had a full service, tappets checked and timing checked and cam chain adjusted . But, once the carbs are balanced they shouldn't need doing again, except if you have PD's of course.

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