Can a Motorcycle Still Start After Cylinder Scoring?
2 Answers
Motorcycle can still start after cylinder scoring. Definition of cylinder scoring: Engine "cylinder scoring" refers to deep grooves being formed on the inner wall of the cylinder, causing the piston, piston rings, and cylinder wall to lose their sealing properties due to friction. This results in reduced cylinder compression pressure and loss of power. The leakage of combustible mixture increases the crankcase pressure, which in severe cases can lead to crankcase explosion, causing the engine to malfunction or even stall. Causes of cylinder scoring: Poor running-in. New or overhauled engines have many microscopic irregularities on the surfaces of parts such as the cylinder liner, piston, and piston rings, making it difficult to form an oil film. If the engine is immediately subjected to heavy load operation without proper running-in, it is prone to accidents such as cylinder scoring. Frequent cold starts. During cold starts, the lubricating oil has high viscosity and poor fluidity, making it difficult to form an effective oil film on the cylinder wall. Research shows that when a diesel engine operates under load with coolant temperature below 30 degrees Celsius, the wear on cylinder liners and other components is 5 to 7 times higher than under normal operating temperatures.
I think if a motorcycle suffers from cylinder seizure, it basically won't start. The piston in the engine gets stuck, and the cylinder walls may be scratched or fused with molten metal, making it impossible to turn over. During ignition, both the crankshaft and drive chain will be obstructed, causing the starter motor to strain in vain or even burn out the wiring. I've seen people insist on trying, only to drain the battery or damage the flywheel, leading to higher repair costs. In such cases, don't force it—check immediately if the oil is insufficient or if there's a cooling system failure. The key to preventing cylinder seizure is regular oil changes and maintaining cleanliness. If it does happen, it's advisable to turn off the ignition, avoid repeated starting attempts, and call a tow truck to take it to a professional shop. The mechanic will use tools to disassemble and inspect it, possibly requiring replacement of the cylinder liner or piston rings to prevent minor issues from turning into major troubles.
