Appreciate the Views
Thanks for the comments and information. My experience has only been with carbureted motors [small block Chevy], old ones at that! If we ran lean on the track/course we would run the risk of burning valves and see engine oil temps skyrocket. The rule was when in doubt go rich. We indeed paid close attention to the AFR for endurance racing.
But this is strictly empirical and anecdotal; so I appreciate the education. Even at this "late date"!
2007 R1200GS Adventure " ...to explore off-road, alone in my case, way out in the boonies...that feeds the soul!"
After 2014 BOM my bike is forthwith the "GS McGee"!