1. The automatic choke devices are all similar, although they vary in detail.

2. The automatic choke includes a thermostatic spring and a vacuum piston.

3. Other features include an automatic choke, a choice of cool colors and rear hydraulic disc brakes.

4. This paper illustrates the working principle, working characteristic and technical requirement of carburettor automatic choke on JY55T motorcycle.

5. Meanwhile the electrical heating actuator and vacuum actuator for automatic choke, as well as the auxiliaries, such as fast idling and throttle stopper are described in detail.