Yes, motorcycles with a traditional ignition system can typically run without a battery once the engine is started. However, it's important to note that the battery plays a crucial role in starting the motorcycle's engine. The battery provides the initial electrical power needed to ignite the spark plugs and start the engine. Once the engine is running, it generates its own power through the alternator or stator, which charges the battery and powers the motorcycle's electrical components.
If the battery is completely dead or removed, it may not be possible to start the motorcycle using the electric starter. However, motorcycles with a kick-start mechanism can still be started by using the kickstarter. Once the engine is running, it will continue to operate as long as there is fuel and a functional ignition system.
In such cases, removing or disconnecting the battery can result in the motorcycle running poorly or not at all.
It's important to consult the specific owner's manual or manufacturer's instructions for your motorcycle model to understand its electrical system requirements and any limitations regarding battery operation.