There can be several reasons why one cylinder might stop working intermittently on a two-cylinder motorcycle engine. Here are a few possible explanations:
Ignition System Issues: A faulty ignition system can lead to intermittent misfiring or complete failure of one cylinder. This could be caused by issues such as a defective spark plug, ignition coil, spark plug wire, or ignition timing problem.
Fuel System Problems: Issues with the fuel system can also affect cylinder operation. A clogged fuel injector, a malfunctioning fuel pump, or a fuel delivery problem can result in inadequate fuel supply to one cylinder, causing it to misfire or stop working.
Electrical Problems: Electrical faults, such as a loose connection, damaged wiring, or a faulty sensor, can disrupt the proper functioning of one cylinder. This can result in intermittent loss of power or misfiring.
Mechanical Issues: Mechanical problems within the engine, such as a worn-out valve, a damaged piston, or a problem with the camshaft or timing chain, can cause one cylinder to stop working intermittently. These issues can disrupt the combustion process and lead to a loss of power in that cylinder.
Air Intake or Exhaust Problems: Any restriction or blockage in the air intake or exhaust system, such as a clogged air filter or a blocked exhaust pipe, can affect the performance of one cylinder, causing it to misfire or stop working.
It's important to note that diagnosing the exact cause of the problem requires a thorough inspection and testing by a qualified mechanic. They can perform diagnostic procedures, such as checking the ignition system, fuel system, electrical connections, and performing a compression test, to identify the specific issue causing the intermittent problem in the cylinder.