| Year | 1951 |
| Date | 12-Apr |
| Volume | 104 |
| Issue | 2,603 |
| Page | 471 |
| Category | Petrol Engine Topics |
| Part | |
| Title | A 50-c.c. Auxiliary Engine ("Busy Bee") |
| Author | Edgar T.Westbury |
| Notes | First operation on main bearing, end-location of ball-race, inner-end face view of main housing, main housing machining |