If 85 kph is as fast as it will go then check the timing again. Mine was slightly out and once ‘tweaked’ it improved quite a bit. Normales (I have read) are supposedly not as fast as BL’s due to the additional weight but I would have thought they would do more than 85 kph.
I had my speedo knocking on 120 kph on Sunday (only for a short time) whether it’s accurate, well…… but I can cruise comfortably at 100 kph
Maybe you overfilled the radiator?
It will find it’s own level not far above the core inlets in the header tank, but again it could be a sign of overheating due to the timing being to far advanced.