| Year | 1972 |
| Date | 07-Jan |
| Volume | 138 |
| Issue | 3,432 |
| Page | 13 |
| Category | Internal Combustion |
| Part | |
| Title | A Twin-cylinder Four-stroke engine |
| Author | P.Bennett of San Francisco |
| Notes | Crankcase, crankshaft, camshaft, cylinders, connecting rods, gudgeon pins, valve, valve guides, heads, tappets, pushrods, rocker arms, points |