Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: florence on November 19, 2009, 11:40:28 AM

Title: CB650 coils
Post by: florence on November 19, 2009, 11:40:28 AM

Does anyone know if CB650 coils will work on CB500/4?

I notice they have detachable HT leads which must be a good thing.  My original Circa 1975 leads are dreadfull in the rain.

Title: Re: CB650 coils
Post by: matthewmosse on November 19, 2009, 01:38:12 PM

I think the cb650 uses cdi ignitin rather than points in which case I'd doubt they'd work. Most assesories / parts dealers will carry points suitable coils that may be possible to fit, david silvers for brand new coils that are 'correct' but my 500/4 came with a brand new set fitted and had cost the PO almost hundred quid. Anything off a pionts ignition bike should work. It is possible to glue new leads into the 500's original coils but it's a pain to do and I've never been completely happy to trust the results.

Title: Re: CB650 coils
Post by: SteveD CB500K0 on November 19, 2009, 02:09:15 PM

There's a FAQ on sohc4.net that shows how to open up the coils and repair them with new leads.

Also, some on there have successfully used CB750/900 DOHC coils that have detachable leads (but need a bit of metalwork/bracketry to fit)

Title: Re: CB650 coils
Post by: florence on November 20, 2009, 07:04:52 PM

Thanks chaps, I will not bid on those ebay 650 coils then.  Grateful for the advice.

Title: Re: CB650 coils
Post by: pae on November 20, 2009, 08:02:56 PM

Quote from: matthewmosse on November 19, 2009, 01:38:12 PM

I think the cb650 uses cdi ignition rather than points ...

Yes, true.