XT/TT serienummers
1976
XT500C, 1E6-000101, Clean White
TT500C, 583-000101
1977
XT500D, 1E6-100101, Ginger Brown
TT500D, 1T1-000101, El Toro Orange
1978
*XT500E, 1E6-000101, Crystal Silver
*XT500E EPA Model, 1E6-205001, Crystal Silver
TT500E, 1T1-100101, Competition Yellow
1979
XT500F, 1E6-220101, Clean White
TT500F, 1T1-200101, New Eltro Orange
1980
XT500G, 3H6-000101, New Yamaha Black
TT500G, 1T1-230101, New Yamaha Black
1981
XT500H, 4R9-000101, Crystal Silver
TT500H, 2Y0-000101, White