| Frame | Model type | Establish year | Name |
|---|---|---|---|
| Model F5B | |||
| 100101 | YB50 355 | 1973 | YB50 |
| 500101 | YB50 355 | 1974 | |
| 600101 | YB50 355 | 1976 | |
| 700101 | YB50 4A5 | 1979 | |
| 820101 | YB50-58E | 1985 | |
| - | YB50-58E1 | 1996 | |
| YB50-58E3 | 1997 | ||
| Model UA05J | |||
| - | YB50 5JE2 | 2000 | YB50 |
| YB50 5JE4 | 2001 | ||
| YB50 5JE5 | 2005 | ||