What is the minimum engine displacement required for motorcycles on highways?

[SanKathryn]

Motorcycles on highways must have a minimum engine displacement of 50cc. A motorcycle is a flexible and fast means of transportation, powered by a gasoline engine, and is a two-wheeled or three-wheeled vehicle steered by handlebars to control the front wheel. It is lightweight, agile, and fast, widely used for patrolling, passenger and cargo transportation, and as sports equipment. On highways, the driving speed of motorcycles must not be less than 60 kilometers per hour and must not exceed 80 kilometers per hour. The daily maintenance methods for motorcycles include: 1. During the break-in period, control the motorcycle's idle speed at 100 rpm; 2. Match the motorcycle's gear with the speed; 3. When braking is needed due to obstacles ahead, release the throttle, step on the rear brake with the right foot, and gently apply the front brake with the right hand; 4. Regularly check the spark plug; 5. When installing a new spark plug, hand-tighten it until it cannot be turned further, then use a spark plug socket to tighten it an additional quarter to half turn; 6. Regularly lubricate the chain.

[EliAnn]

I often hear people ask what engine displacement is required for motorcycles to ride on highways. According to Chinese regulations, motorcycles must have at least 125cc to be road-legal, ensuring they have sufficient power to maintain high-speed travel, such as cruising steadily at 80 km/h or above. 125cc entry-level bikes are economical and affordable, but in my actual riding experience, they may struggle when climbing hills, especially in strong winds where the bike tends to wobble more. Motorcycles with 250cc or above are noticeably more stable, with quicker acceleration and safer overtaking. Highway riding also requires wearing a full-face helmet and passing annual vehicle inspections. Beginners are advised to start with at least 150cc—safety first, and don’t try to force a small-displacement bike onto the highway just to save trouble.

[EdwardLynn]

As a seasoned long-distance rider, I believe engine displacement is crucial for safety. While 125cc is the minimum requirement for highway riding, it's far from ideal—slow acceleration, high wind resistance, and prone to drifting. Models above 250cc offer sufficient power, shorter braking distances, and better stability during high-speed turns. Motorcycle highway safety isn't just about displacement; you must also check tire wear, chain tension, and light brightness. Small-displacement bikes become particularly dangerous on wet roads—I recommend starting with at least 250cc for peace of mind. Vehicle weight and balance also matter, as heavier large-displacement bikes have better road grip.

[AdalineAnn]

I came from being a beginner and was torn about the displacement issue. A 125cc can go on the highway, but the speed is barely sufficient, and the weak acceleration makes it unsuitable for urgent trips. Around 150cc is economical and practical, and I recommend this range for first-time highway riders—it's easy to handle for practice. During actual riding, pay attention to maintaining a safe distance and ensure the speed on the dashboard doesn’t exceed limits. Good fuel efficiency and low consumption make long-distance rides worry-free and cost-effective. Beginners shouldn’t fear small displacements but should familiarize themselves with speed limits on different road sections.