There could be several potential reasons why your Yamaha R15 V2.0 loses acceleration intermittently while riding. Here are a few possible issues to consider:
Fuel Delivery: One possible cause could be a problem with fuel delivery, such as a clogged fuel filter or a faulty fuel pump. Insufficient fuel flow can lead to a loss of power and acceleration. It may be worth checking and cleaning the fuel filter or having the fuel pump inspected.
Air Intake System: Issues with the air intake system can also affect acceleration. A clogged air filter can restrict airflow to the engine, resulting in reduced power output. Check the air filter and clean or replace it if necessary.
Spark Plug Problems: Faulty or worn-out spark plugs can cause misfires, resulting in a loss of power and acceleration. Consider inspecting the spark plugs for signs of wear or damage and replace them if needed.
Electrical Issues: Electrical problems, such as a faulty ignition coil or a weak battery, can cause intermittent power loss. Have the electrical system checked to ensure all connections are secure, and components are functioning properly.
Throttle Position Sensor (TPS): The TPS is responsible for relaying throttle position information to the engine control unit (ECU). If the TPS is malfunctioning or improperly calibrated, it can lead to acceleration issues. A diagnostic scan may be required to identify any TPS-related problems.
Engine Compression: A decrease in engine compression can result in reduced power and acceleration. If the engine has worn-out piston rings or valves, it may be necessary to perform a compression test to assess the engine's condition.
Exhaust System: A restricted or blocked exhaust system can hamper the engine's performance and result in decreased acceleration. Check for any obstructions or damage in the exhaust system.
It's essential to have a qualified mechanic or Yamaha service center inspect your motorcycle to diagnose the specific issue accurately. They can conduct a thorough examination, perform necessary tests, and identify the root cause of the intermittent acceleration loss. This will help determine the appropriate steps to resolve the problem and restore your bike's performance.