hey guys if you are alright useing base oil in your bike. dennis kirk has the  
 bardahl premium motorcycle engine oil in 20w50  for $2.70 a liter on clearance. i have used this oil for the past two oil changes. i'm sure it is as good as the yamalube. and 20w50 is the new recommended oil weight  
 by yamaha. they have done away with 20w40 for 2008. and replaced it with 20w50. checked with bardahl and the oil does meet the new jaso ma  
rateing. just thought i would let you guys know. tired of paying that six to twelve dollars a quart.