CuDaMan
Yeah ... it's exactly what the guys above have said.
You wanna' run with the recommended tire pressures, and that especially goes for your front tire. The pressures in MC tires are not like tires on auto's. You can drive your car on tires that are a bit low, and there's not much bad effect (provided your tires are not ridiculously low). But for MC wheels you need to be dead on with your tire pressures. Guys who race bikes will adjust their tires in 1 psi increments - meaning that they might reduce a tire pressure by 1 psi below recommended ... then see how that affects the handling of the bike. Then they might do another adjustment ... just by another 1 psi. It can be that sensitive. So you never wanna' run tire pressures that are 10 psi lower than what the manual says.
When you really get to know your bike, you can adjust tire pressures a bit - esp. for the rear tire. Running the rear tire pressure slighly low (and I do mean slightly) can give you a bigger contact patch with the asphalt. This improves your braking. But you need to ensure that you are not overheating the tire by doing this. And DON'T do this if you are cruising on the freeway (i.e. higher speeds). Tires with lower pressures can overheat, which can ruin your friction with the road and wind up damaging the tire rubber.
So my advice is to stick with the exact reommended tire pressures until you get very experienced, then start learning more about friction & tire temperatures.
have fun!
dT