How fast can a domestic twin-cylinder 400cc motorcycle go?
4 Answers
Domestic motorcycles with a 400cc displacement can reach a maximum speed of 190 kilometers per hour. Here is some relevant information: Heavy motorcycles: Heavy motorcycles generally refer to motorcycles with an engine displacement of over 400cc. They are powered by gasoline engines and are two-wheeled or three-wheeled vehicles steered by handlebars. They are lightweight, flexible, and fast, widely used for patrols, passenger and cargo transportation, and also serve as sports equipment. Classification of motorcycles: Power-assisted vehicles (below 50cc), small-displacement motorcycles (50cc to 250cc), mid-range (400cc to 750cc), and large-displacement (above 600cc) are all referred to as large-displacement motorcycles. In China, motorcycles with a displacement exceeding 400cc are generally called heavy motorcycles.
I've ridden quite a few domestic 400cc twin-cylinder motorcycles, with speeds typically ranging from 140 to 150 kilometers per hour. For example, the CFMoto NK400 can easily reach 145 km/h at full throttle on the highway, but due to wind resistance and rider weight, the top speed might drop to around 130. The twin-cylinder design ensures smooth power delivery, unlike the noticeable vibrations of a single-cylinder, making daily commutes at 80-100 km/h effortless. With aftermarket exhausts or lightweight modifications, it might occasionally hit 160 km/h, but safety always comes first. Regular maintenance of the chain and engine oil is recommended to keep the engine in top condition. Lighter models accelerate faster but may compromise stability at high speeds, so don't always chase the top speed.
I often ride a domestic twin-cylinder 400cc bike, and I feel its speed is quite impressive. It can generally maintain 90-100km/h on city roads, and at full throttle on the highway, it reaches around 145km/h in actual tests. For example, my friend's Qianjiang 350, after twin-cylinder tuning, once hit 152km/h, with acceleration under 10 seconds. Usually, twin-cylinder bikes have less vibration and are more agile, making them suitable for long-distance rides. Weather conditions should be noted, as speed drops significantly against headwinds. Modifying the air filter or flashing the ECU can increase the top speed by a few kilometers, but it affects longevity. When choosing a bike, check the engine parameters; bikes with 20-30 kW power tend to have more stable speeds.
The domestic twin-cylinder 400cc has a speed range of 120-160km/h, with safety as the priority. When I rode it, the highest speed reached was 148km/h, which is quite risky. It is recommended to maintain 70-80km/h within the city. Ensure that the brakes are responsive and the anti-skid system is functioning properly. Lighter vehicles accelerate faster but are prone to instability at high speeds.
