What is the reason for the Sundiro Honda Century Dream only reaching 40 km/h at full throttle?
2 Answers
Sundiro Honda Century Dream only reaching 40 km/h at full throttle may be due to reasons such as not being in gear or the motorcycle speed limiter. The specific reasons are as follows: Not being in gear: The speed ranges for motorcycle gears 1 to 5 are: 1st gear (climbing speed) between 10 to 20 km/h, 2nd gear between 20 to 30 km/h, 3rd gear between 30 to 50 km/h, 4th gear between 50 to 60 km/h, and 5th gear above 60 to 100 km/h. You can try shifting gears again. Motorcycle speed limiter: It is generally installed on the carburetor assembly. Its most basic principle is to limit the throttle opening, thereby restricting the maximum speed. You can visit a professional shop to remove the speed limiter.
This is a pretty common issue. I've been repairing motorcycles for over ten years and have encountered many Century Dream owners complaining that their bikes can only reach 40 km/h even at full throttle. First, check if the air filter is clogged with dust—open up that plastic box and inspect it. If it's blocked, the engine won't get enough air and will lack power. Next, the main jet in the carburetor might be clogged, preventing fuel from entering and causing the mixture to be too lean, which keeps the RPM from rising. Also, inspect the drive belt—if it's severely worn or slipping, the engine will rev but the bike won't move. Check the pulley as well. If the exhaust pipe is clogged with mud, the bike will struggle to run. Finally, don’t forget the spark plug—too much carbon buildup can cause poor ignition, making the engine sluggish. You'll need to check each of these one by one, and it’s best to bring a multimeter to test voltage and current.
