I put a Cobra Power Flow air cleaner on my '21 Free about a year ago. Gas mileage held at an average of 37 mpg. About 5 months back I fit a crankcase breather bypass and fuel mpg stayed the same. Last month I installed Cobra 909 Slip-on mufflers and my fuel mpg has dropped about 4+ mpg. 1 - I guess I'm not running lean and 2 - is this normal?
3 - Keeping in mind the above, I filled the tank a couple days ago. The odometer currently shows 146.2 on the refill. My reserve light (R) shows at the moment 30 miles remaining and LF indicates 11.8. Does this mean I can run 41.8 miles before I'm stone empty? I have yet to figure out the LF indicator. My apologies if this sounds like an algebra question. Let me see, 146.2/30 (-11.8) = x (?)