There can be several reasons why your Pulsar 135 engine may be overheating. Here are some common causes to consider:
Insufficient Cooling: The engine's cooling system may not be functioning properly, leading to inadequate cooling. This could be due to a malfunctioning radiator, coolant leaks, a faulty cooling fan, or a clogged cooling system. A lack of proper cooling can cause the engine temperature to rise.
Low Coolant Level: If the coolant level in the radiator is low, it may not be able to effectively cool the engine. Insufficient coolant can result from leaks or improper maintenance. Regularly check the coolant level and address any leaks promptly.
Faulty Thermostat: The thermostat regulates the flow of coolant through the engine. A malfunctioning thermostat can prevent proper coolant circulation, leading to overheating. It may be stuck closed, restricting the flow of coolant, or stuck open, preventing the engine from reaching its optimal operating temperature.
Cooling Fan Issues: The cooling fan helps dissipate heat from the radiator. If the fan is not functioning correctly, or if there are electrical issues with the fan motor or fan relay, it can lead to inadequate cooling and engine overheating.
Ignition Timing Problems: Incorrect ignition timing can cause the engine to run hotter than usual. This can be caused by a misaligned timing belt, faulty ignition system components, or improper tuning.
Engine Oil Issues: Insufficient or degraded engine oil can lead to increased friction and heat generation within the engine. Ensure that you're using the correct type and grade of engine oil and change it regularly as per the manufacturer's recommendations.
If your Pulsar 135 engine is consistently overheating, it's recommended to have it inspected by a qualified mechanic or authorized service center. They can diagnose the specific cause of the overheating issue and perform any necessary repairs or maintenance to resolve the problem.