So I just completed my first boxer valve check/adjustment on my 1150 GS single spark with 18k on the clock. Not sure when previous owner had it done last. I wanted to pluck my eyes out till I figured out loosening one, actually tightened the other. Anyway valves are done and it’s the first time I’ve had both plugs out since changing them after buying the bike last year. Left cylinder on left, right cylinder on right. Left running a little lean? Would the valve adjustment correct that?