thanks ron after someone said that super unleaded didnt have ethanol in it last week when i went out for a run i filled up with shell V power super unleaded i definitly think the M20 pulled better
V power certainly makes my Harley run a lot better than regular unleaded. It has smoother, faster acceleration and spits back a lot less (they all bdo this to some extent when they have a stage one kit on them if they are carburetted) I now only put regular unleaded in it as a last resort.