| Serial # Range | Summary of Change / Description | Part # | Doc # | Download Link |
|---|---|---|---|---|
| 42989 - 43400 | Replaced 00181-3 w/20982 | - | 21007 | Download Manual |
| 42480 - 42988 | 19520 Chain Cover Replaced 15678 | - | 19441 | Download Manual |
| 42000 - 42479 | Original Design | - | 19517 | Download Manual |