What is the phenomenon of fuel cut-off during motorcycle riding?

[OAddyson]

Motorcycle riding with fuel cut-off phenomenon is as follows: Engine weakness: The motorcycle gradually slows down and cuts off fuel during riding, the engine slowly shuts down automatically, and there is an obvious feeling of engine weakness before shutting down, which is generally a fuel supply system failure. Abnormal noise during fuel cut-off shutdown: If the engine makes a loud "popping" sound during the fuel cut-off shutdown process, cannot start after shutdown, and the kick starter feels very little compression, it can be concluded that the cylinder head gasket has been burned through or the crankshaft oil seal is damaged. Unable to accelerate: Some motorcycles have dual or multiple cam lobes. If a single cam lobe igniter is used, there will also be this problem of normal idle speed but inability to accelerate normally, which is actually misfiring. Incorrect ignition timing: Some long cam lobes, if using a short cam lobe igniter, will also have this problem.