05-25-2013, 05:02 PM
I took the owners manual recomendation and ran regular gas. The compression ratio is only 9.5 to 1, so any higher grade would be a waste.
When I was hearing the ticking sounds on hard acceleration (that ultimately turned out to be just the FI working) I ran a couple of tanks of 91 and there was no difference.
My CB750 will develop some detonation (pinging on hard acceleration) when temps get over 105F. I have typically switched to midgrade for the hottest months and will probably do the same for the CB11. When the thermometer reads 105F in the shade, intake temps on hot asphalt, behind a hot engine are closer to 130.
Edit : Almost forgot. Filled up for the 10th time today. This tank was almost entirely city riding (with a heavy wrist) and turned in 41 mpg.
When I was hearing the ticking sounds on hard acceleration (that ultimately turned out to be just the FI working) I ran a couple of tanks of 91 and there was no difference.
My CB750 will develop some detonation (pinging on hard acceleration) when temps get over 105F. I have typically switched to midgrade for the hottest months and will probably do the same for the CB11. When the thermometer reads 105F in the shade, intake temps on hot asphalt, behind a hot engine are closer to 130.
Edit : Almost forgot. Filled up for the 10th time today. This tank was almost entirely city riding (with a heavy wrist) and turned in 41 mpg.