A GUIDE TO THE CHOICE, SETTING AND USE OF TAPERED NEEDLE MOTORCYCLE CARBURETTORS
| 1 | FUNCTIONS OF THE CARBURETTOR |
| 2 | FEATURES |
| 2.1 | Carburettor diagram and principal parts |
| 2.2 | Operating ranges |
| 2.3 | Installation angles |
| 2.4 | Engine connections |
| 2.5 | Air Intakes |
| 2.6 | Construction materials |
| 3 | OPERATION, SELECTION OF CORRECT PARTS, TUNING AND USE |
| 3.1 | The venturi effect |
| 3.1.1 | Selection of the correct carburettor size |
| 3.2 | Fuel supply system |
| 3.2.1 | Selection of the needle valve size |
| 3.2.2 | Selection of the float |
| 3.3 | Starting from cold |
| 3.3.1 | Independent starting circuit |
| 3.3.2 | Selection of starter emulsion tube and starter jet |
| 3.3.3 | The flooding plunger starting device |
| 3.4 | Idle systems |
| 3.4.1 | Setting the idle with a mixture adjusting-screw |
| 3.4.2 | Setting the idle with an air adjusting-screw |
| 3.4.3 | Selection of the correct size of idle jet |
| 3.5 | Progression system |
| 3.6 | Full throttle operation |
| 3.6.1 | Full throttle system as usually used on two-stroke engines |
| 3.6.2 | Full throttle system as usually used on four-stroke engines |
| 3.6.3 | Selection of the throttle valve cutaway |
| 3.6.4 | Selection of the tapered needle |
| 3.6.5 | Selection of the correct size main jet |
| 3.7 | Acceleration mechanism |
| 3.7.1 | Diaphragm accelerator pump |
| 3.7.2 | Selection of correct pump cam and pump jet |
| 3.7.3 | Piston type accelerator pump |
| 4 | MULTI-CYLINDER ENGINES |
| 4.1 | Idle tuning and adjustment |
| 5. | FACTORS WHICH CAN ALSO AFFECT THE CARBURATION |
| 5.1 | Changes of fuel |
| 5.2 | Changes in atmospheric pressure and air temperature |