i am using yamalube only because i have a few quarts left, for meanwhile, i went to a 40:1, this helped out a whole lot. im doing this until i get a chance to rejet. but the plugs last alot longer this way. our bike bogs for a second when u put it in first gear, then the power band kicks in then it has no problem. someone told me to try raising the clip up a notch to get rid of this hesitation, i will just have to play around with the jetting, does eric gorr come in this mini section? maybe he can give us some pointers on jetting!!! keep us posted what u find , thanks, dean ;)