Just a follow up. Oddly, my gas gauge began "acting" normal again.
And , I do use fuel stabilizer.......Stabil and or Seafoam. Ferret is correct......10% Ethanol fuel here......can't seem to locate unmolested fuel. Perhaps there was a small dirt Grimlin in the midst???. All's good so far. Thank...
Perhaps I'm being Mr Obvious, but, check coolant level ( reserve / overflow ) if it's low or over filled , Tire pressure , take a peek and see what brand of oil filter is there ( never can tell what previous owners have done ) . When you get it home, perhaps take a look at the air...
Tires / handling. Odd feeling from tires that have a specific "ridge" around its circumference vs a rounded profile tire (s)......in cornering.......at a certain point, it feels like the bike just DROPS into a curve or corner ; quite unsettling! . Can't wait to change tires.
If this was already answered, apologies.
How old is the battery?. I understand testing under a load but, out on the road running , there's a alot of differences in load vs on a test bench, IMO .
I'm aware the OP found the "stuck in 2nd gear" situation / followed bike manuals advice. Ride on