| Year | 1946 |
| Date | 13-Jun |
| Volume | 94 |
| Issue | 2,353 |
| Page | 575 |
| Category | Petrol Engine Topics |
| Part | |
| Title | "Carving Out" a Two-Stroke Engine. The "Zephyr" 2 1/2 c.c. engine |
| Author | Edgar T.Westbury |
| Notes | Machining operations on engine body, shaping operation on crankcase barrel, cylinder finishing, main bearing housing |