SOHC.co.uk Forums > CB500/550

Ongoing PD46 carburettor woes (possibly)

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deltarider:

--- Quote from: Oddjob on June 14, 2020, 03:30:48 PM ---... the 600 was to show that with an engine in fine fettle they will go much lower...
--- End quote ---
You beat me. Once I was able to have it idling at 800. Not that I recommend it. You want that oil up there. Most bikes of that era wore up there, not at the bottom.

--- Quote ---I'm toying with the idea of changing the HT leads to red instead of black, they'll match the NGK caps and look a little different.
--- End quote ---
Long time ago I went for silicone HT leads and dito plugcaps. Great stuff. At the time there was yellow only. Now even Louis has black.

JezzaPeach:
Hi Keith. Not that you need to but I’ve used a small right-angled Torx bar with a JIS or Philips driver tip to undo all bowls and remove/clean the main and idle jets with a set of abrasive wires/brushes off eBay, but fiddly!
Re the coils cylinders 2&3 had been slower to warm up.
I bought DSS copy coils and just needed to fit female bullet connectors to I think the yellow adapter leads. There is + and - so note. They then fit fine. Cool screw mounts 11cm apart unlike a set I bought on eBay and returned.
Old ones screws tight to undo. A decent JIS T bar driver useful.
Might be possible to recoup some £ by selling the old coils for refurb.
Other issues, a faulty no 2 plug of all things. Have replaced all plugs with non resistor ones, replaced plug caps with NGK resistor ones, and all working well. CB500/4 K1)

JezzaPeach:
PS another thought. I think the idle screws may have small holes in them that may get blocked. Not sure but worth checking.

K2-K6:
"David Silver has repro ones at a more palatable £30 + VAT for the coils although they don't seem to be handed (same one for both the left and the right side as far as I can see) - has anyone had experience of these?"

No direct experience of these but they don't appear to draw any significant level of failure comments on here.

They would most likely give you a competant fix immediately though to allow you riding it while running well. 

The originals worth keeping for if you decide to repair/ or for someone else to do the same if they wanted originals.

JezzaPeach:
Yes the DSS ones worked very well for me and fitted fine.

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