What is the reason why the electric start of a motorcycle cannot ignite but the kick start can?
2 Answers
The electric start of a motorcycle failing to ignite while the kick start works may indicate a problem with the motorcycle's battery, or it could be due to cold weather causing a decrease in engine oil performance, leading to insufficient cylinder pressure. Below are some common motorcycle fault-related introductions: 1. Blue smoke from the exhaust pipe: First, check if the engine oil level is too high, as an excessively high oil level can cause oil to rise. When checking the oil level, do not do so immediately after the engine stops; wait for about 10 minutes after shutdown before checking. 2. Black smoke from the exhaust pipe: Check the concentration of the air-fuel mixture. After noticing this symptom, first inspect the carburetor air valve. After the engine shuts down, observe the main nozzle from the carburetor. If there is oil flowing or dripping, it indicates that the float chamber oil level is too high. Adjust by appropriately bending the float's tongue upwards or adding suitable shims under the needle valve seat. 3. White smoke from the exhaust pipe: White smoke from the motorcycle's exhaust pipe is often caused by water vapor in the fuel, cylinder, or muffler. 4. Insufficient power: This situation is mostly due to aging piston rings causing poor sealing, valves not closing tightly, or a clogged carburetor.
This situation is actually quite common, mainly caused by electrical system issues. Insufficient battery voltage or aging is the most frequent cause - motorcycle electric starters require high current to drive the motor, and a weak battery won't be able to turn it. Poor contact in the starter button or loose wiring connections could also be the culprit, especially after riding in rainy weather when oxidation tends to occur. Another possibility is a faulty relay, which is responsible for conducting high current during electric starting - if it's broken, the current won't pass through. Finally, the starter motor itself might have problems, like worn carbon brushes or a seized rotor. I've encountered this several times when repairing bikes myself. The best approach is to first test the battery voltage, then check all wiring connections for looseness or oxidation. If everything seems normal, you'll need to disassemble and inspect the starter motor. For older motorcycles, special attention should be paid to aging wiring issues.
