This Yamaha FRAME - SHOULD WORK on these models and components (please confirm your application) they use the same engine guard and crankcase part numbers:
1969 AT1E CRANKCASE
1969 AT1M CRANKCASE
1969 CT1 CRANKCASE
1970 AT1B CYLINDER - CRANKCASE
1970 ATM1B CYLINDER - CRANKCASE
1970 CT1B CYLINDER - CRANKCASE
1971 AT1C CYLINDER - CRANKCASE
1971 AT1MX CYLINDER - CRANKCASE
1971 CT1C CYLINDER - CRANKCASE
1972 AT2 CRANKCASE CYLINDER
1972 CT2 CRANKCASE CYLINDER
1973 AT3 CRANKCASE CYLINDER
1973 CT3 CRANKCASE CYLINDER
1974 DT125A CRANKCASE - CYLINDER
1975 DT125B CRANKCASE - CYLINDER
1976 DT125C CYLINDER-CRANKCASE