But that only applies if your bike is SUFFERING FROM detonation. If your bike isn't, then you are just throwing money down the toilet, and making the oil industry even richer.
Here's the best advice I can give you on the gasoline subject:
Next time you hit reserve on your bike, go to you preferred gas station. Add 1 gallon of low test. Ride until you hit reserve, making sure you go through all the extremes you can go through.
Add 1 gallon of midgrade, and repeat. Then finally 1 gallon of high test.
After trying all the various grades, use the one that gives you the best performance, and the best mileage.
BC.
I didn't do it, I swear.
And even if I did, what makes you think I would admit it to you?