Rec counter drive from dynamo

[Erich]

Hi All

I'm missing a couple between the bottom of the dizzy to the drive cable. I don't recall who made this conversion. Can anyone help?

Erich in Mukilteo

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[Lowespeed]

Hi, you are missing something like this     . I found one amongst the motorcycle suppliers on a well known auction site.
https://www.ebay.co.uk/itm/125214216009?...Sw95xlzg-r

[Nick Lettington]

I think Tony Betts sold a few... possibly Dave Dye made some too...

[Erich]

Yes, mine should be similar but obviously dimensions need to be exact. I suspect this is several inches too long.

Erich in Mukilteo

[Austin in the Shed]

Erich,I’ve spoken with Chris about this.

[Tony Griffiths]

From something I posted before - an alternative fitting and the strong possibility of having to mess about getting the cable length correct.
The rev counter drive on my Ulster is taken from the bottom of the distributor spindle. Needing a replacement distributor, the end of its shaft was drilled, and the square-hole shaft into which the squared end of the cable fits was taken from a scrapped Ford 10 Speedo (£10, including post on eBay) and pressed into it. Having gone to that trouble, a friend said, “Why didn't you use a clock key? You can get a four-spoke one with different sizes of square holes from Bay for a few pence”. Oh well, I consoled myself with the thought my fitting was in steel, not brass.
As the old cable had been repaired several times, a new one was bought - easy enough? Not quite, for juggling outer cable length, inner cable length and correct fitting of a “stop” on the cable at the rev counter end proved entertaining to solve - but eventually, at the second attempt (my fault) the short-hours-working Company Speedy Cables of Cardiff came up with one with the correct ends and assorted lengths. It is nice to have a rev counter on a sporting car.

[Erich]

Tony, nothing is ever as easy as it ought to be. I've got everything, including the cable. However, the missing coupler is the issue. I had sent the dynamo back to the UK recently to have ti converted to 6 volt from 12 volt. I believe the coupler was there when I sent it. I believe the coupler, like the bushing, cannot be removed without removing the drive gear on the dynamo, which requires removing the end cap.

Erich in Mukilteo

[Tony Griffiths]

Maybe you'll need a completely new cable with a connector already attached. Even then, some fiddling with the attachment point and the various dimensions at the distributor end will be required - it's always a puzzle when trying to get non-standard parts to work. The spade connector system looks to be a far more robust solution than a cable with its end ground square and fitting into a square socket.