ive been wondering the answer to that question for so long!!! well i guess i've gotten the info I need from ppl. So thanks EVERYBODY for your contributions!
and as to mixture's I run 80:1 on my 06 sherco 290 But sometimes if im just playing around doing wheelies etc I do run it a bit richer... It does sound a lot snappier and more responsive when running leaner though
But I have even run as rich as 50:1 but yeah didnt sound the best but still ran ok