You'll also want to start log-book of your rides with model tyres used along with pressure. You'll notice trends with pressure settings that'll give you most traction for braking & cornering. Find actual braking-distance of your actual tyres at different pressures.
Bike manufacturers used to give optimum pressures for each model depending upon tyres used (similar to charts above). But that was too much work and opened them up for too much liability (at least in U.S., what if someone used tyre-pressures for one tyre model with different tyre?).
So about 15-yrs ago, moto makers got together with tyre makers to come up with universal solution of 2.5/2.9 bar pressure for everything! Tyre makers would design for max-load@max-speed at that pressure and moto makers would list that in their manual. It's not optimum setting, but least of all evils.
Never mind that 137kg CB125 @ 116kph top-speed puts lots less load on its tyres than 264kg Suzuki Hayabusa at 300kph (limited). Yet they both have same 2.5/2.9 bar recommended pressure! Ridiculous!
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