Hello,every body~ i come here introduce my self and ask some advice about my MB i'm from Taiwan. and i'd buy a engine kit for my bike about 5 weeks ago.(as the attachment) i'm interested in how's the fuel economy you get with your MB ?:goofy: i got 40KPL. i'd hear a little bird told me someone get 80KPL!! :sweatdrop: May you share some way to enhance fuel economy with me ? thanks~~:rolleyes7: another guestion to ask,i had changed 3 sparking plug since the engine install(when the head of the sparking plug goes be black(carbon on it?),then you can't start the engine) ,the motorcycle engineer says my mix ratio for the engine oil just too high ~ they advice me adjust the ratio down to 50:1 or less (while who sold me this engine says 20:1).