Thanks guys, Upshift, the DR is similar to the F650 in size / power and I'm running 25 psi but maybe I'm also a bit throttle happy.....
Oscar, I don't know if a higher pressure would make a great difference in my situation but I'll see if I can get a definative answer regarding the correct pressure.
I'm currently running a Pirelli M21 so that will be an interesting comparison.
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