So far I am very happy with the 500 HO, just did the 25 hour oil change and lube was very easy. Two things, anyone use the Napa NBH 20G4022, I would like to keep one as a spare. Secondly I feel the power is low to mid, once you gain speed or need more the throttle just doesn't seem to be all there. Anything that will help upper end? FYI I am above 3000 in Calgary.