Many older motorcycles, particularly those with carbureted engines, may have a manual choke. The choke is a device used to enrich the air-fuel mixture during cold starts, helping the engine to run smoothly until it warms up. By restricting the air intake, the choke increases the amount of fuel in the mixture.
On motorcycles with a manual choke, there is usually a lever or knob near the carburetor or on the handlebars that the rider can adjust. When starting a cold engine, the rider pulls the choke lever or knob to engage the choke, enriching the mixture. As the engine warms up and reaches operating temperature, the rider gradually reduces or turns off the choke to restore the normal air-fuel ratio.
It's important to note that with the advent of fuel injection systems, which have become more common on modern motorcycles, the need for manual chokes has decreased significantly. Fuel-injected motorcycles utilize electronic control systems that automatically adjust the air-fuel mixture based on various engine parameters, eliminating the need for a manual choke.
Therefore, while some motorcycles, especially older models or those with carbureted engines, may have a manual choke, it is not a universal feature on all motorcycles, especially those with modern fuel injection systems.