http://i67.photobucket.com/albums/h3...55-Graph-5.jpg

Hard to ride, yes. But you are talking HRC's best efforts to make 70+hp, that's like thinking since you bought the new Camero that you can call Hendrick Racing and have them give you the Jimmy Johnson Special.

As far as a tune, still going to need to get the settings right to make peak power, just the 4 stroke won't run as bad when it has a bad tune.

As far as mileage, thus far in sleds, jetskis, and outboard engines, the newer 2 strokes produce less emissions, are cleaner buring, and are substancially higher in mileage (more effecient, makes power every cycle of the engine, vs. every other on the 4-stroke). The 600 E-Tec Ski Doo has people getting almost 80% increase in mileage vs. the previous 600 2 stroke, and it is over 100% more than the closest 4-stroke. 200-220 miles on 9 gallons is getting to be common.

I'll take less stuff to break (less parts) and lighter weight (less parts) anyday.