Hi Simon. I have a slightly battered one. I think that is has been used with an incorrect rotor arm at some time, because the insulation is burnt next to each of the four HT contacts. The carbonised plastic has been cleaned off and lacquer applied. So it should be good to go.
If you want to try it ...

Brake shoes now all sold.

Message received John.

Just do an internet search for either imperial thread grease nipples, or metric if you prefer. If your current shafts are in good condition, you could drill and tap them to suit the nipple. The shafts are not very hard. It's good idea to fit nipple covers to keep the dirt out.

I have Avon Roadrider Mk11's on my 4G Mk1. I often ride two up, occasionally on wet roads; and they perform very well. I have done approx 3000 miles on them.
They are showing some wear but there is still plenty of tread left. They are 100/90-19, and are quite a tight fit in the mudguards. I had to ...

A pair of good useable, 7' half width brake shoes. £5 + postage.

I had the same problem in the distant past, also on a Burman gearbox. I tried Loctite on the spline, and a couple of spots of braze.
They both worked for a while, but eventually failed. My final solution which is still working years later, was to drill and tap the centre of the splined shaft, and ...

Hi Klaus. First check that your oil pressure is not higher than necessary. 60 psi is enough. When I first fitted a Morgo to my Mk1 I was getting a reading of 100 + psi at 90 kph.This will over oil everything.
It is easy to adjust on the Mk1, not so easy on the Mk2 which has the oil pressure relief ...

Here is a picture of mine. The grease nipple is 1/4 BSF; but as Simon says, you may be talking about the threaded hole for the rear chain tension adjuster.

Thank you Rein. Klaus Gerhard has already found a pair for me. Cheers Chris.