The appearance of an engine warning light on your Yamaha R15 V2 when riding above 70 could indicate a few potential issues. It's essential to have your bike properly diagnosed by a qualified mechanic to determine the exact cause. However, here are a few common possibilities:
Overheating: Riding at higher speeds can generate more heat in the engine. If the cooling system is not functioning correctly or there is a coolant leak, it could lead to overheating. The engine warning light may be triggered as a safety precaution. Check your coolant level, radiator, and cooling fan to ensure proper functioning.
Electrical Issue: A problem in the electrical system, such as a faulty sensor or a loose connection, could trigger the engine warning light. This can affect various components, including the engine's fuel delivery or ignition system. A thorough inspection of the electrical system is necessary to identify and resolve any potential issues.
Engine Misfire: Riding at higher speeds may exacerbate an existing engine misfire. A misfire can be caused by several factors, such as a malfunctioning spark plug, ignition coil, or fuel injector. These issues can disrupt the combustion process and trigger the engine warning light. It's advisable to have the ignition system inspected and the spark plugs replaced if necessary.
Engine Management System Fault: The engine warning light could also indicate a problem with the engine management system itself. This could be due to a malfunctioning sensor, a software glitch, or a fault in the ECU (Engine Control Unit). A diagnostic scan using specialized equipment will help pinpoint the specific issue.
It's important to address the issue promptly to prevent any potential damage to your motorcycle. Consulting a qualified Yamaha technician or mechanic who is familiar with your specific model will enable them to diagnose the problem accurately and recommend the appropriate repairs.