What is the purpose of motorcycle gears?
2 Answers
Motorcycle gear shifting is actually similar to that of cars. In lower gears, the characteristics are slower speed but higher torque, while in higher gears, the speed is faster but the torque is smaller. This is like a clutch-equipped reducer because the engine keeps rotating once ignited, and the rotation speed is not low. Without gear shifting, if the engine's rotational speed is directly output to the wheels, besides excessive speed, it could also cause stalling due to excessive inertia during startup. Therefore, the transmission and gears are quite important. International gear pattern: Wide-range shifting: press down for first gear, lift up for fourth gear. Narrow-range shifting: press down for first gear, lift up for fifth gear. Rotary gear pattern: There are five-speed or four-speed variations. Continuously pressing down shifts through 1, 2, 3, 4, 5, and 0 gears, with neutral located between first and second gear.
As someone who enjoys studying mechanics, I believe the primary function of motorcycle gears is to allow the engine to operate more efficiently at different speeds. Lower gears like first and second provide high torque, aiding smooth starts or climbing hills; higher gears such as fifth and sixth reduce engine RPM, making them suitable for high-speed cruising and fuel efficiency. If you use the wrong gear—for example, not downshifting when climbing a hill—the engine might struggle or even stall, compromising riding safety. In practice, I've observed that proper gear shifting also reduces engine wear and extends its lifespan. Although modern motorcycles come with automatic transmissions, I prefer manual shifting because it offers riders more control and enjoyment, especially on winding roads where precise gear changes enhance the overall riding experience.
