Yeah,I really do not want to mess with a good thing.Just wonderin,WHY.Is the engine just really comfortable with itself.Is there something about THIS,particular 17.5mm carb,is the intake different?The carb is stock.Rear tire stock,Hell,everything is stock.I realize from reading here,the thought and effort put into these little machines,By people who know a lot more than I do,to achieve this speed.But I have done nothing,and not knowing why it moves like a pissed off bee,bugs the livin sh** outta me.Does anyone know?Is the 2005 Canadian model super9 l.c.different in some way.and yeah,they quit shipping them to Canada,because of emissions.Yeah right,We can't get them any more because,They're CHEAP and FUN.