Oiled brakes. They work remarkably well. But on investigation as to why I was not stopping as quickly as I would like, I discover a speedo unit packed with litho grease. Which is almost liquid. Which has been centrifuged out forming a nice smooth protective covering all over my left hand side disk. So tonight I have been mostly taking the front wheel off, degreasing the speedo hub, degreasing the disks including the little holes, removing the film from all over the rest of the wheel and putting it all back together again. But its too late to get all of the torquing up done now. I wonder if I'll remember to do it in the morning ? Bike keys taped to the torque wrench should help to remind me.