I’m hearing detonation and my spark plugs are coming loose. What should I do?

First and foremost, if you hear detonation (pinging) or suspect it's occurring, STOP riding your bike immediately. Continuing to operate the engine under detonation conditions can lead to catastrophic damage—such as broken rods, wrist pins, or complete engine failure.

What You Should Do:

1. Switch to Higher Octane Fuel:
Your idea to use 100-octane fuel is a smart move. Higher octane helps prevent detonation, especially in performance applications.

2. Inspect Spark Plug Installation:
It’s uncommon for spark plugs to loosen on a Hayabusa under normal conditions. If this is happening, check the following:

• Use anti-seize on the spark plug threads.
• Always use a torque wrench to tighten to spec.
• Make sure you're using a thin-wall socket. A standard socket may bottom out on the cylinder head casting, preventing the plug from fully seating. This is a known issue when sockets are too wide.

Tip: We fabricate our own tool using an OEM Busa spark plug wrench (from the factory tool kit) welded to a 3/8" drive socket—it works perfectly in tight clearances.

3. Richen the Fuel Map: We've attached a version of your map with 15% more fuel added in the 80–100% throttle columns. You can adjust further if needed. Keep in mind: for optimal performance and safety, a custom dyno tune is always the best solution.

Reminder: Our base maps are safe for typical setups, but variations in fuel quality, riding conditions, or modifications may require fine-tuning. Never ignore signs of detonation—it’s one of the fastest ways to destroy an engine.