| Year | 1980 |
| Date | 05-Sep |
| Volume | 146 |
| Issue | 3,640 |
| Page | 1,051 |
| Category | Internal Combustion |
| Part | 4 |
| Title | The Jones 22.5. A two cylinder, two stroke, i.c. engine |
| Author | Colin Jones |
| Notes | The rotary induction valve, carburettors, mounting foot, flywheel and collet |