16 Teeth Yamaha Road FZR400 U,W,A USA88-90 19 Teeth Yamaha Road FZR400 R EXUP MK1,MK21WGJapan88-89 FZR400 RR EXUP3TJ1 FZR400 RR EXUP3TJ2-7 FZR400 RR EXUP4DX1/2 90-95 FZR400 SC U,W,A USA88-90 FZR400 RRSP,RR USA91-92 SR400 Japan SR400 E,EC,F,FC,G,GC,H,HC2RD 14-17 20 Teeth Yamaha Road SR500 91-00