Hi all been for a blat out today on my mc21, it has the wire splice and airbox mod done, everything else is standard.
goes well starts well so thought i would just give it a quick plug chop just to see how things are
and found the plugs a bit lean, my question is in the summer i seem to remember them being ok
so am i right in thinking that as it's winter the air is denser which leans things off a bit?
so iv'e taped 1 hole up in the airbox and plugs look better, but bike doesn't go as well as i did, would you
leave it with 1 hole taped up for winter then remove tape in summer? or tape 1/2 hole, or remove all tape,
i don't think the it was that lean it was ready to seize,as iv'e been out a few times in this cold weather so would asume
if somthing was going to go wrong it would have already

any help/advice would be great thanks