Why Won't My Motorcycle Start When It TURNS OVER? Common Issues and Solutions
Motorcycles are thrilling machines that require regular maintenance and care. However, there may be times when your motorcycle won't start but continues to turn over, which can be frustrating. This can signal various issues ranging from simple fuel and spark problems to more complex ignition and electrical faults. Let's dive into the common causes and steps to fix them.
Common Issues and Causes
When a motorcycle fails to start but turns over, it often indicates that the engine is cranking but not firing. There are several common issues that could be at play, including:
Fuel System Issues
1. Fuel Delivery - The fuel pump may not be functioning properly, or there could be a blockage in the fuel line.
2. Fuel Quality - Old or contaminated fuel can prevent the engine from starting.
3. Clogged Fuel Filter - A dirty filter can restrict fuel flow.
Ignition System Problems
1. Spark Plugs - Worn or fouled spark plugs may not ignite the fuel-air mixture.
2. Battery and Electrical Issues Weak Battery - An undercharged or defective battery may not provide enough power for the ignition system. Starter Relay or Solenoid - Faulty components in the starting circuit can cause issues.
3. Wiring Issues - Damaged or corroded wiring in the ignition system can lead to a lack of spark.
Mechanical Issues
1. Compression Problems - Low engine compression due to worn rings or valves can prevent starting.
2. Timing Issues - Incorrect timing can prevent the engine from starting.
ECU or Sensor Issues
1. Faulty Sensors - Issues with sensors like the crankshaft position sensor can prevent the engine from starting.
2. ECU Malfunctions - Problems with the engine control unit can disrupt ignition timing and fuel delivery.
How to Troubleshoot and Fix the Problem
Below are the steps to identify and fix the common issues mentioned above:
Step 1: Check the Fuel Supply
1. Check for Gasoline - Make sure that the fuel tank is not empty.
2. Check the Carburetor's Condition - If wet, it means the fuel is flooding the motor, requiring drying.
Step 2: Inspect the Spark
1. Check the Spark Plugs and Ignition Coil - Clean and replace if fouled.
2. Inspect the Spark Wires - Ensure they are securely connected.
Step 3: Test the Engine's Electrical System
1. Check the Battery - If weak, charge or replace it.
2. Inspect the Starter Relay and Solenoid - Look for any damage or wear.
Step 4: Investigate Further Mechanical Problems
1. Check the Compression - Low compression often indicates worn out parts; consult a professional.
2. Verify the Timing - Use a timing light to ensure correct timing.
Step 5: Address Electronic Control Unit (ECU) Issues
1. Inspect Sensors - Replace faulty crankshaft position or other critical sensors.
2. Check ECU Functionality - Consider a diagnostic scan for any coding issues.
Final Word
When your motorcycle won't start but turns over, it's crucial to systematically check all the components mentioned above. With careful inspection and maintenance, you can usually identify and fix the issue yourself. However, if you're unsure or if the problem persists, it's best to take your motorcycle to a professional mechanic.
Remember, proper maintenance and care of your motorcycle can help prevent these issues from occurring in the first place.