What are the reasons for a motorcycle's high-voltage wire not sparking?
2 Answers
Motorcycle high-voltage wire not sparking can be due to the clutch switch being in a closed state or insufficient battery power. Below are the relevant details: Solutions for motorcycle high-voltage wire not sparking: Check if the cylinder pressure is normal. It might be caused by bent valves that cannot close tightly, leading to insufficient pressure for starting. This can also cause engine oil leakage, which is a common reason for minor oil leaks in many motorcycles. Additionally, it may lead to chrome layer peeling, oxidation, and rust at the connection between the exhaust pipe and the engine. Precautions for motorcycle ignition: Always allow the engine to cool down before washing. Sudden cold water rinsing can damage the oil seals in various parts. After washing, wipe the entire motorcycle dry with a cloth, especially areas like the ignition switch, instrument panel, left and right handlebars, spark plug, and fuel tank cap. Pay special attention to removing the spark plug cap, shaking it a few times to remove any water inside the sleeve, as this can affect ignition.
I've been riding motorcycles for several years, and issues with high-tension wires not sparking are quite common. During a trip in the wilderness, my bike stalled halfway, and there was no spark from the high-tension wire. Upon inspection, I found that the plug was loose, and rainwater had seeped in, causing oxidation. There are various reasons for this: it could be due to aging and breaking of the wiring, cracks in the insulation layer causing leakage, insufficient battery power failing to deliver high voltage, or a dirty spark plug with too much carbon buildup preventing ignition. When handling it myself, I first use a multimeter to check the voltage output. If there's none, I try replacing the wire. Safety first—never work on the engine when it's hot to avoid electric shock. It's advisable to cover the bike when parked to prevent rain exposure and prolong its lifespan. If a problem occurs on the road, pull over immediately and don't force the ride. Repairs usually cost just a few dozen dollars, so don't risk safety to save a little money.
