YEAR/MODEL CONVERSION CHART FOR EARLY MODELS Z50: Year Model Frame Serial# 68-69 Z50K0 Z50A-100001~ 69-70 Z50K1 Z50A-120088~ 70-71 Z50K2 Z50A-270236~ 1972 Z50K3 Z50A-1000001~ 1973 Z50K4 Z50A-3000001~ 1974 Z50K5 Z50A-5000001~ 1975 Z50K6 Z50A-6000001~ 1976 Z50 76 Z50A-6100001~ 1977 Z50 77 Z50A-6200003~ 1978 Z50 78 Z50A-6300003~ CT70: Year Model Frame Serial# 69-71 CT70K0 CT70-100001~ 70-71 CT70HK0 CT70H-100001~ 72-73 CT70K1 CT70-2000001~ 72-73 CT70HK1 CT70H-2000001~ 1973 CT70K2 CT70-2100001~ 1974 CT70K3 CT70-2300001~ 1975 CT70K4 CT70-2400001~ 1976 CT70 76 CT70-2500004~ 1977 CT70 77 CT70-2600008~ 1978 CT70 78 CT70-2700005~ (Note: CT70H models have 4 speed manual transmissions) SL70/XL70: Year Model Frame Serial# 71-72 SL70K0 SL70-1000001~ 1973 SL70K1 SL70-1100001~ 1974 XL70K0 XL70-1000001~ 1975 XL70K1 XL70-1100003~ 1976 XL70’76 XL70-1200004~ XR75: Year Model Frame Serial# 1973 XR75K0 XR75-1000001~ 1974 XR75K1 XR75-1100001~ 1975 XR75K2 XR75-1200002~ 1976 XR75’76 XR75-1300001~ 1977 XR75’77 XR75-1400001~ 1978 XR75’78 XR75-1500001~
