Manufacturer Part Number : 40540-GC4-731

# 2K7-13621-20 / 2K7-13621-10 / 2K7-13621-00 / 80L-13621-01 / 80L-13621-00    NOS New Old Stock

1978 XS650SE - Crankcase

1984 VF1000F AC - REAR BRAKE CALIPER

Someone might have removed it to install a back rest or carrier on the bike

YAMAHA XS500E XS500 E 1978 Service Manual Supplement 2F1-28197-10 LIT-11616-00-77 #737.1 SUZUKI FA50 FS50 FZ50 OR50 TS100 TS125 TS185 TS250 SP100 SP125 SP200 SP500 Tail Light Lens 35712-48510 Manufacturer Part Number : 40540-GC4-731YAMAHA XS500E 1978 Factory Service Manual Supplement, 19 pages OEM Ref. # 2F1 28197 10 LIT 11616 00 77 NOS New Old Stock. #737. 1 A 1st Edition, May 1977 This manual has been published to supplement the Service Manual for XS500B and the Supplementary Service Manual for the XS500C For complete information on service procedures, it is necessary to use this Supplementary Service Manual with the Service Manual for XS500B and the Supplementary Service