When you start a motorcycle, whether using the self-start or kick-start mechanism, you can expect to hear a few distinct sounds. Here's a general description of the typical sounds during the starting process:
Ignition and Fuel Pump: When you turn the key or press the starter button, you may hear a brief whirring or clicking sound. This is the sound of the ignition system engaging and the fuel pump priming, preparing the engine for start-up.
Starter Motor: If you're using the self-start mechanism, you'll hear a distinctive whirring or buzzing sound as the electric starter motor engages and turns the engine's crankshaft. This sound is typically continuous as long as you hold down the starter button.
Engine Firing: As the crankshaft rotates and the engine cylinders start firing, you'll hear a series of combustion sounds. This is the actual sound of the engine coming to life. It may sound like a series of rapid explosions or pops, depending on the specific engine design and exhaust system.
It's important to note that the sound produced during motorcycle startup can vary based on several factors, including the specific motorcycle model, engine design, modifications, and exhaust system. Additionally, the condition and maintenance of the motorcycle can also influence the sound it produces.
If you're looking for a more precise description of the sound produced by starting the Gixxer 155 naked, I would recommend referring to the owner's manual or contacting the manufacturer or authorized dealer for detailed information.