RE: You Can Do Engine Problems
Running lean will not hurt the bearings. It can hurt the liner, but not the bearings. Engines do seem to be more sensitive to idle adjustments when inverted, I suppose due to the fuel tank height issue we've been talking about. Keep leaning the idle until it runs and transitions right, which will likely mean the LSN will be turned in a little more than it would be in an inverted setup due to the fuel pressure difference. Because the right setting is farther in, the needle becomes more sensitive which can mean that the difference between just right and too lean is very small. So when you're close, make tiny adjustments until it's exactly right.