Here's a sketch and list of materials that you'll need
Both fixings use the holes in the frame for the centre stand. Mine did not have the bushes in place, if your do then you can either remove them or use a smaller domed rubber washer.
This is the assembly for the clutch side fixing. I had to open out the hole through the domed rubber washer with a drill bit to accept the threaded rod.

And this is how it is assembled.

The domed rubber washer is to locate the assembly centrally as well as absorb some of the inevitable vibration. It is oversized to the hole and when the assembly is tightened up will fit snugly as you can see in the picture below.
Oops!! Spot the deliberate mistake from the previous picture. There is now an extra nut and washer appeared.

This is the assembly for the throttle side fixing. Again open out the hole through the domed rubber washer with a drill bit to accept the threaded rod.

This shows how it is assembled

Start by threading the two nuts at the left hand end of the rod and lock tightly together by turning towards each other. Place the 32mm washer and domed rubber washer and thread through the centre stand hole towards the outside of the bike. Thread another 32mm washer and two more nuts onto the rod, ensure that the rod is central in the hole and and tighten the first nut then lock the second nut onto it. As shown below. (note for clarity you cannot see one of the nuts on the left hand side of the picture, but it is there)

Then thread two more nuts onto the rod and again lock together by turning tightly towards each other leaving approximately 15mm of the rod exposed. Thread another 32mm washer and a 25mm rubber washer onto the end and you will have an assembly like this.

Each side should now have approximately 10-12mm of thread exposed at the end. The bellypan can now be fitted by springing the sides apart to fit the rear mounting holes over the rear fixings. It will then look like this...

....and this

Fit a washer and nylon lock nut loosely on either side, screw the front fixings into place and then using a 10mm spanner or preferably socket tighten the rear nylon lock nuts.
And you then have a nice secure bellypan. Ready for removal and painting.

PS Does anyone have a spare set of rocker covers in good condition
