Tyre pressure is a critical setup to the bike. You cant just inflate to what ever. It all depends on tyre construction (Brand of tyre). All tyres have an optimum tyre pressure for getting heat into the tyre and maintaining it, but also at the other end of the spectrum longativity(tyre wear).
The lower the tyre pressure increases flex in the tyres to help hold the heat and increase grip by inlarging the contact patch on the road.
The higher the pressure the less flex, hence tyre runs cooler giving increase in life of the tyre.
Suspension settings and tyre pressures alsoeffect each other.
Man I was running 34psi in the front and 38psi in the rear of the OEM D207's. I now have just put on a set of BT010 and Im trying to come to a new set of tyre pressures, also changed the rear shocks settings as it was to firm with the new tyres construction.
My tyre pressures are a ballance between the two extreames of grip and tyre life.
Sorry for raving on..............