Oops, I went to put the parts away and found the sides are a little different. Here is a tracing of the RHS and a couple of pics. Sorry some of the pics before are upside down, but you get the idea.

I forgot to say the metal thickness of the original is 2.5mm. The flat ones I mage for sidecar use are 1/4".

Here's a tracing, holes sizes are nominal, drill for clearance. If you are going to fabricate a replica of the pressed part, the strip can be cut, bent and welded. Note that the front of the plate is not bent at 90 deg to the side. I measured 101 degrees, but the front is slightly rounded. Photos in...

It almost looks like it will foul the exhaust pipe. I would keep it, it looks alright and does the job. But Simon you are an experienced restorer, whatever decision you make will be the right one, you don't need to ask.

I have the pressed ones which I will measure, but I actually made some flat plates so I could put a side car on. If you are not worried about originality, I think the flat plates work fine, and were easy to make. Anyway I can give more info about both next week. Here's a pic of the flat ones. You wo...

Hi Scott, I can take pics and measurements of 1948 front engine plates. I think they are the same parts for 1950. However I will not be back home to do it until mid next week.

Mine is on a Sq4, wired in circuit after the ignition key. So it is only on when the ignition is on. Not sure what you would do on a magneto bike, probably just pull one spade off the back of the meter when not in use. I bought a very cheap ebay one, not expecting it to last, just long enough to be ...

I bought a Paul Goff one. I made up a mounting plate for the fork top nut. The idea was to use it until I had confidence in the charging system, then remove it. It helped me work out that I had a voltage regulation problem. The volt meter was installed after, as a diagnostic, because the led kept fl...

Seen on Ebay, no connection to me.

https://www.ebay.com.au/itm/Ariel-Squar ... Sw~5he~E74