The behavior you described, where the temperature gauge blinks and the radiator fan starts immediately after starting the engine of your Bajaj Pulsar NS200, indicates a potential issue with the cooling system of your motorcycle. Here are a few possible reasons for this behavior:
Coolant level: Check the coolant level in your motorcycle's cooling system. If the coolant level is low, it can trigger the temperature warning and cause the fan to start running to cool the engine. Ensure that the coolant level is at the recommended level as specified in the owner's manual.
Faulty temperature sensor: There could be a problem with the temperature sensor or its wiring. A malfunctioning sensor may send incorrect temperature readings to the gauge, leading to the blinking and fan activation. If this is the case, it is recommended to have the sensor inspected and, if necessary, replaced by a qualified mechanic.
Cooling system blockage: Another possibility is that there might be a blockage or restriction in the cooling system, such as a clogged radiator or a malfunctioning thermostat. These issues can disrupt the proper flow of coolant, resulting in overheating. A thorough inspection of the cooling system is advised to identify and resolve any blockages.
Electrical issue: It's also worth considering the possibility of an electrical problem, such as a short circuit or wiring issue. An electrical fault can interfere with the temperature gauge and trigger the fan to start even when the engine is not overheating. A professional diagnosis by an experienced mechanic is recommended in such cases.
To address the issue effectively and ensure the optimal performance of your motorcycle, it is advisable to consult an authorized service center or a qualified mechanic. They will be able to diagnose the specific cause of the blinking temperature gauge and fan activation and provide the necessary repairs or adjustments to rectify the problem.