I am putting Metzeler ME 880 tires on.. and decided to look around the web site.
Ran into this info about tire pressure:
Tire PressureHmm.. way higher than what the sticker on the bike says!
Dug further, and found the brochure (pdf file):
2008 Full Line BrochureLook at Page 43. Same thing, but very bike specific.
Glad I looked, or I would be running around with under inflated tires!