I don't think it is an overheating issue, as it happens when the bike has been still for a long time.
For clarity I have attempted some photo's.

there is a white patch on the paintwork in this first photo, this is where I have written "Behind Here" using photoshop. This is where the module is.

A shot with the covers off

from the right hand side of the bike.
You can see that it is in there with a lot of other wiring, and that the "sheilded" wire is way too long.
I am going to take it to an auto electrician and get him to shorten the wire. This will make it very neat and the other wires will not bother it.
I don't have the tools required to do it myself, I think this is the best option.
Greg