If the neutral safety switch shows "off" on YDIS, how will the engine respond when trying to start?

When the neutral safety switch indicates "off" on the Yamaha Diagnostic Information System (YDIS), it prevents the engine from cranking or turning over. The neutral safety switch is a crucial component that ensures the engine can only start when it is in the neutral gear or, in some cases, when the clutch is disengaged. This safety feature is designed to prevent unintended engine startups that could lead to accidents or injury.

When the neutral safety switch shows "off," it essentially signals that it's unsafe to start the engine, leading to a complete halt in any starting attempts. Hence, the response from the engine when trying to start will be that it does not turn over at all. This design ensures safety by preventing the engine from engaging when the vehicle is not in a safe starting condition.