Part No. | Spares No. | Model | Years | Drawing? | Notes |
2000-26 | A6/45 | Sing | 1926 | | |
| A6/124 | Sing | 1927 | | |
2000-28 | A6/236 | Sing | 1928 | | |
| A6/583 | Sing | 1929 | | No air breather, new oil pump |
2000-30 | A6/583a | Sing | 1930-31 | | Air breather, top of case |
2000a-32 | A6/583a | Sing | 1932 | | "No oil hole", lower breather |
| A6/583b | Sing | 1933-34 | | |
2000-35 | A7/507 | Sing | 1935-40 | Y | No recess around pump, lower breather only |
2000-38 | | Sing | 1938-41 | | Draganfly number (no original Ariel number), 2 breathers |
2000-41 | A7/507a | Sing | 1941-49 | Y | Oil pressure relief added, upper breather only |
| A7/507ab | Sing | 1950-51 | | 5/16 rocker oil feed, no oil pressure relief |
2000-52 | A7/507b | Sing | 1952 | Y | No oil feed stud |
| | Sing | 1953-54 | | New shape around top case screw, Draganfly number (no original Ariel number) |
2000-56 | | Sing | 1955-58 | | Dowels added, part number should be -55 |
2005-56 | | HS | 1955-58 | | Different bush, part number should be -55 |
| | | | | |
2000-31 | A7/66 | Sloper | 1931 | | |
| A7/66a | Sloper | 1932 | | |
| | | | | |
2005-29 | A6/364 | Colt | 1929 | | |
2005-30 | A6/364a | Colt | 1930 | | |
2005-31 | A8/18 | Colt | 1931-32 | | |
