The throttle wire on a Harley-Davidson motorcycle, like many other motorcycles, is a mechanism that connects the throttle grip to the throttle body or carburetor, allowing the rider to control the engine's speed and power output. The throttle wire, also known as the throttle cable, is responsible for transmitting the rider's input from the throttle grip to the engine.
Here's a general overview of how the Harley throttle wire works:
Throttle Grip: The rider operates the throttle by twisting the throttle grip, typically located on the right handlebar. As the grip is twisted, it applies tension or releases tension on the throttle wire.
Throttle Cable Housing: The throttle cable is housed within a protective casing called the throttle cable housing. The housing keeps the cable safe from external elements and provides a path for the cable to move smoothly.
Throttle Cable: The throttle cable is a flexible metal wire that runs inside the throttle cable housing. It has a specific length and is attached to both the throttle grip and the throttle body or carburetor.
Throttle Body/Carburetor: The other end of the throttle cable is connected to the throttle body or carburetor, depending on the specific Harley-Davidson model. The throttle body controls the amount of air entering the engine, while the carburetor mixes air and fuel for combustion.
Cable Movement: When the rider twists the throttle grip, it applies tension or releases tension on the throttle cable. This tension is transmitted through the cable, causing it to either pull or release the throttle mechanism in the throttle body or carburetor.
Engine Response: As the throttle mechanism in the throttle body or carburetor is actuated by the cable's movement, it adjusts the amount of air (and fuel, in the case of a carburetor) entering the engine. This, in turn, affects the engine's speed and power output.
The throttle wire system allows the rider to control the engine's throttle opening, enabling acceleration, deceleration, and idle speed adjustments. It is a crucial component for regulating the motorcycle's performance and providing a responsive riding experience.