This one I knew Twisty would agree with me on.twisty said:The 999 is not that bad. A guy @ the track had one and said if you keep on you valve adjustments you should be ok. EVERY 8k miles!!!! TO HELL WITH THAT!!! They are the HD of sportbikes. Plus they use HEX heads for everything and those are hard to safety wire. Now the Aprillia Factory, thats a bike. Another guy @ the track has one. He has a Mille R and never has touched the motor in 10K race miles. Now that is a work horse.!!!!