Are the ns125d and the Splitter the same engine?
3 Answers
These two motorcycles use the same engine, but there are differences in tuning. Engine: Both motorcycles are equipped with an engine coded as nsc125, which has a displacement of 124.9cc, a compression ratio of 9.8:1, a maximum power of 6.87kw, a maximum torque of 10.3 Nm, a maximum power speed of 7500 rpm, and a maximum torque speed of 6000 rpm. Engine working principle: Motorcycle engines generally operate at higher speeds because they have smaller inertia. The working principle of a motorcycle engine is actually the same as that of a car engine. Motorcycles also use a four-stroke gasoline engine, which operates in four strokes: intake stroke, compression stroke, power stroke, and exhaust stroke. During the intake stroke, the engine's intake valve opens, and the piston moves downward to draw in the combustible mixture.
Speaking of this, I think many people confuse the RX125 with the NS125D, but in fact, they are not the same thing. From what I’ve learned in the motorcycle community, the RX125 specifically refers to a 125cc scooter model by Wuyang-Honda, such as the RX125, which uses a specially designed single-cylinder air-cooled engine that emphasizes fuel efficiency and low noise. On the other hand, the NS125D seems more like another series from Honda, such as the NS125D underbone bike, equipped with a 125cc single-cylinder engine but designed more for rural road use. Although both engines have the same 125cc displacement, they differ in power output, cooling methods, and internal structures, and their parts are not interchangeable. For daily riding, the RX125 scooter is convenient for urban commuting with smooth acceleration, while the NS series is more suitable for off-road use. I recommend carefully checking the vehicle’s nameplate or contacting the dealer when buying or repairing a bike to avoid purchasing the wrong parts for the sake of saving money, which could affect performance.
As someone who frequently repairs motorcycles, this is a common question. The Liexing and NS125D do not share the same engine; they belong to different Honda model series. The Liexing 125 is a scooter, typically equipped with a single-cylinder engine labeled as PGM-FI or similar. The NS125D likely refers to the NS125D underbone bike, which comes with a different 125cc air-cooled engine. The differences lie in the compression ratio and durability—the Liexing's engine is better suited for frequent starts and operates quietly, while the NS series is designed to handle bumpy roads. If users encounter engine issues, they shouldn't guess the model; instead, they should refer to the original manual or visit a repair shop for a diagnostic scan to avoid wasting time. During routine maintenance, the oil change intervals also differ. I've seen cases where mixing them up led to chain wear. In short, knowing the distinction can extend the bike's lifespan.
