1-5GENINFO ESPECIAL TOOLS12 34 56 78 90a bSPECIAL TOOLSThe use of correct special tools recom-mended by Yamaha will aid the work andenable accurate assembly and tune-up.Improvising and using improper tools candamage the equipment.NOTE:9For U.S.A. and Canada, use part numbersstarting with “J-”, “YB-”, “YM-” “YU-” or“YW-”.9For others, use part numbers starting with“90890-”.MEASURING1. Tachometera P/N. YU-08036-Ab 90890-067602. Mity vacP/N. YB-3595690890-067563. Leakage testerP/N. YB-0359590890-067624. Pinion height gaugeP/N. YB-34232N.A.5. Digital caliperP/N. N.A.90890-067046. Shimming plateP/N. N.A.90890-067017. Dial gauge setP/N. YU-0309790890-012528. Backlash indicatorP/N. YB-0626590890-067069. Magneto baseP/N. YU-3448190890-0670510. Base plateP/N. YB-0700390890-07003