Pictsidhe.......I understand what you're saying but we will probably end up agreeing to disagree on a few points. 1.Motorcycle engines are no more complex than any other engine....they are quite simple actually,just different than other engines. 2. Expecting peak power for long durations isn't ambitious at all....they are designed for it from the factory and will show no more signs of wear than any other engine. 3. Motorcycle engines dont see peak power for long durations: Motocross....these engines are full throttle,engine braking down through the gears and then slammed full throttle...over and over through an entire race. This is brutal on pistons,rods and cranks. GP......streetbike is full throttle,engine braking down through the gears and then slammed full throttle....over and over through an entire race. This is brutal on cranks,rods and pistons. Enduro.....engine is held wide open for the entirety of the race....generally lasting many tanks of fuel and several hundreds of miles through blistering heat and very sandy conditions. Hare & Hound scrambles.....see enduro. Flat trackers....engine is held full throttle through the whole race. To say that a motorcycle engine can't sustain peak power for long durations and will wear excessively if pushed hard just doesn't ring true with my 45 years of riding and racing streetbikes and dirtbikes. I beat on my bikes like they are step-kids and I have never once experienced an engine failure or had to rebuild an engine. Oil,plugs,fuel,jetting,chains,sprockets,tires,valve adjustments...yes....but mechanical failures.....never once. Hell,most of the professional motocross and streetbike GP teams run entire seasons on one engine and never do anything more than general maintenance....... Have I mentioned that the Japanese build great engines ??? Kevin To prove a point......this is my 92 GSXR-750 Slingshot with a 907 big bore kit and some other work that SHOULD kill its dependability. I've beat on this bike for almost 27 years and when I show up on River Road to make some money on the weekends everyone just quietly mutters "sh**********t"...and I've got to find a newbie to get someone to step up to the plate to get spanked. This bike has had a hard life since 1992 and IS STILL GOING STRONG with almost 45k on the clock. Have I mentioned that the Japanese build great engines ??????