There are several reasons why a motorcycle sputters. The most common reasons are carburetor issues such as a vacuum leak, fuel leak, or tuning issues. Other culprits could include corroded or cracked spark plugs or spark plug wires, a faulty ignition coil, a clogged air filter, or engine timing issues.

What causes a motorcycle engine to misfire?

An improper air/fuel ratio, compression or timing, restricted air or fuel, a clogged carburetor, and a faulty spark are all common culprits behind motorcycle misfiring when hot or cold.

What are the main causes of engine misfire?