Okay chaps, after a month sat in the garage the thermowax unit on my FZ1S seized up again.
So after stripping top half of bike to get at it, then forgetting to detach the return spring tab and spending half hour trying to retrieve it with a piece of bent wire, and then graunching and drilling out one of the two retaining screws, which I should have greased last time, before stripping/freeing/lubricating/reassembling it, then putting everything back together (no bits left over, whoop), has anyone any bright ideas how to stop the bloody thing seizing up again.
On the upside, bike now starts and idles as it should from cold so happy bunny ...