The fork oil should be replaced every two years, so I was a year overdue. Fortunately the Breva 1100 forks are quite simple to work on. After a bit of a struggle getting them out – I had to use a screwdriver to lever open the handlebar pinch clamps – the old fork oil poured out as clean as a whistle.
Washed out the sliders with kerosene, let them drain, then poured in 450ml of the new Penrite Fork Oil 10.
Reassembled the front end. A couple of hours’ work. Test run tomorrow.