| Year | 1960 |
| Date | 12-May |
| Volume | 122 |
| Issue | 3,070 |
| Page | 574 |
| Category | Internal Combustion |
| Part | |
| Title | Flat Twin Petrol Engine of 50 c.c. |
| Author | Edgar T.Westbury |
| Notes | Valves and valve operating gear. Inlet and exhaust valves, valve retainers, tappets and guides |