An update, just in case anyone has the same issue in the future.
Although the angle drive appeared to be working OK, as soon as you attached the sppedo cable and put tiny bit of load it stopped working. I imagine the gears inside had stripped. It was a sealed unit so couldn't check properly, and had been fitted without the special 'copper washer' which is needed to prevent failure.
Ordered a replacement TR/MG/Healy one, but unfortunately the quill is too big to fit in the gearbox drive. Took the drive to pieces, removed the quill gear and carefully ground it down (about 0.5mm on each face) until it fitted (I have a spare gearbox drive gear so was easy to do in the shed).
Fitted, and now have a working speedo again
Will contact the supplier to see if they do a drive with a smaller quill and keep as a spare, in case my modification has caused a weakness.
Out of interest, contacted Speedograph Richfield on 30/3/19 about a replacement speedo drive.
After three phone calls and five emails, they promised delivery late last week or early this week. Nothing has arrived, my card hasn't been charged, and I've heard nothing from them for 7 days. Got it next day delivery from ebay in the end
Also sent emails to Burton Power, and Speedycables last week, and to date, still waiting for a response.
Who said good service was dead?
