Why can't the motorcycle go faster than 60 km/h?

[DiLiam]

Here are the reasons why a motorcycle cannot reach high speeds: Exhaust pipe blockage: The exhaust pipe is clogged with carbon deposits and dirt, or the front bend of the exhaust pipe is dented. Such motorcycles perform fine at low speeds but cannot reach high speeds. Repair method: Disassemble the exhaust pipe and use a drain cleaning auger or a drill with a steel wire rope to scrape off the internal carbon deposits. Alternatively, burn off the carbon deposits with high-temperature fire. Air filter blockage: The rubber pipe is bent and obstructs airflow, or the foam inside the air filter is clogged with dust, leading to severe fuel-rich conditions due to restricted air intake. Repair method: Adjust the intake pipe and clean the foam inside the air filter. If the air filter is functioning properly, adjust the carburetor to prevent excessive fuel richness.