At what engine temperature does the Qidian 150G1's fan start working?
3 Answers
Qidian 150G1's fan starts working when the engine temperature reaches 90 degrees. Definition of motorcycle engine: A motorcycle engine is a mechanical device that ignites the fuel-air mixture entering the cylinder, converting the thermal energy generated by combustion into mechanical energy. The crankshaft then transmits this power through the transmission mechanism to the motorcycle's rear wheel, transforming it into the driving force for the vehicle. Engine classification: Based on different energy conversion methods, engines can be categorized into electric motors (electrical energy → mechanical energy), hydraulic machines (water energy → mechanical energy), wind turbines (wind energy → mechanical energy), nuclear engines (nuclear energy → mechanical energy), and heat engines (thermal energy → mechanical energy), etc. Heat engines can be further divided into external combustion and internal combustion types. The motorcycle engine is one type of heat engine.
I usually pay close attention to motorcycle performance parameters, especially the cooling system. The fan activation temperature for the Qidian 150G1 typically ranges between 95 to 105 degrees Celsius, depending on the sensor settings. When the engine reaches this temperature, the temperature sensor automatically triggers the fan for cooling. I’ve personally tested it in summer traffic jams—when the water temperature soared to around 100 degrees, the fan kicked in with a hum. This design is quite reasonable since air-cooled engines primarily rely on natural airflow during riding, and at low speeds, the fan becomes essential. If your fan doesn’t activate even at 110 degrees, I recommend checking for loose sensor connections. Also, remember to clean the radiator fins annually—dust buildup can reduce cooling efficiency, forcing the fan to run longer.
As a motorcycle enthusiast, I've noticed that the fan operating temperature of the Qidian 150G1 fluctuates around 100 degrees. A few days ago, I specifically measured it with an infrared thermometer - the fan kicks in precisely at 102 degrees. Actually, the engine itself can withstand higher temperatures, but it triggers an alarm when exceeding 110 degrees. Once I forgot to add coolant which caused overheating and breakdown, since then I've developed the habit of immediately checking the fluid level. If the fan doesn't rotate, it's mostly a sensor issue, or possibly a relay failure - this component is located near the battery, sometimes gently tapping it twice with a screwdriver can restore function. Of course, during daily riding, avoid constantly revving the engine in low gears, otherwise the fan will activate more frequently.
