there's never a set psi when it comes to tire pressure that will work for any tire for any application. launching, wheelies, drifting, autox, drag racing, stoppies, etc...
what are you running right now? are you locking up the front tire?
my advise would be slowly decrease the pressure til you find what suits your tire, bike, and you the best
Adam - Slocum Racing
'95 lt1. 355 - 9.4:1 - LE2 heads - LE cam - t70 @ 8psi (until i get moar fuel)
'03 CBR600RR - Two Brothers Slip-On