I've tried using various "insulating" materials between the cylinder and the engine with little success John. The problem is the bolts still transmit the heat........ Have thought about using fibre washers under the cap heads to see if that helps, but haven't had the time of late.
I'm also looking at a brake upgrade using off the shelf bermbo bits. Bigger cylinder and caliper?? Haven't got around to spec' ing it yet though.
The weird thing is though, i've got a couple of bikes that come through here with no probelms at all
yet others, mine included go off after a couple of weeks.