BT016's 42psi Front and 40psi rear on street.
As russty and bg said handling and steering is dramatically improved over the lower pressures.
By the way I Love the BT016's on the ZX14, I have always been partial to Pirelli's until the 16's, they stick like glue, are very good in the cold and wet, and are wearing very well.
For comparison The BT016's are 10 times better than the stock BT014's,
2008 ZX14 MMSB
Muzzy M14/M10<<<>>>>>>PCIII
BMC Race Filter<<<>>>>Vortex 43T/KHI 16T
Pirelli SC 190/55<<>>>Race Railz
Puig Windscreen<<<>>>>Projekt D Rad. Guard
Engine Ice<<<<<<<>>>>>Amsoil 20w-50syn
"Head Down and Elbows Out"
"Any motorcycle with 2-wheels that roll, a functioning engine/motor(I'm not gas biased,lol), and will move of its own power, I will have fun on, but on a 14 its Always a Fu***ng BLAST!"