SOHC.co.uk Forums > CB500/550

CB550K3 with PD carbs

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Johnny4428:
Yes had them stripped completely for initial clean and refurbishment of carbs. Thanks for the pics all the same. I’ll have a play about. Had a quick 12 mile blast this afternoon and running great, just hanging on that idle a bit. But great starting.

K2-K6:
The PD carbs on 750 F2 always responded well to a squirt of their accelerator pump to start them from even slightly cooled down, just a little extra to get them a little richer and aid instant starting.

I know that not many like the PD carbs  :) but they do meter particularly accurate fueling, almost to injection levels of detail, thats along with quite clean burning combustion.  Always good for exhaust life if unburnt fuel is not slooshed through the motor, oil condition too also benefits from this, and it follows that bearings etc do benefit from this.

They maybe finicky, but they are effective.

deltarider:
How about increased heat and the valves?

K2-K6:

--- Quote from: deltarider on March 19, 2023, 01:53:17 PM ---How about increased heat and the valves?

--- End quote ---

Increased heat from which source?

deltarider:
A leaner burning, what else?

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