4x Kawasaki ZX-11 1994-2001 Blue Titanium Rear Disc Rotor Bolts Screws with Threadlock. 4x KawasakiZX-11 1994-2001 Blue Titanium Rear Disc Rotor Bolts Screws with Threadlock. Titanium screws are best known for being strong, lightweight and corrosion resistant.