30/30 always good place to start. From a motard pov (same tyres and light weight) is always started at 30/30.

Checked my pressures with warmers on/cold tyres....1 Psi difference if that.

In the end on a hot day i ran 25/25 in the end on Michelin sm race slicks.

Road tyres usually started and ended around 28-30.
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Lemon owner and lover