Honda kits fasten either front or rear rotor. Kit includes six M6 x 19mm rotor bolts and six M6 Fuji locking nuts. Suzuki Kawasaki rotor bolt kit includes 4 M6 x 13mm front rotor bolts and four M8 x 15mm rear rotor bolts. Yamaha bolt kit fastens both rear and front rotor, includes 12 M6 x 13mm rotor bolts with threadlock.