got my CRF450X'05 with fully uncorked engine.. dyno run shows 46.4HP at the wheel. the primary usage - as the supermoto, im riding as noob at the track. aint taking a role in any competitions. btw im not so skillful to kill the engine like a pro, but as daily summary - it takes about one hour to get to the track from my home and another to get back. and about 1 and a half of a hour at the track. so the engine keeps working for about 3-3.5hours as the summary. its the total dailt ride time. essentially, I change engine and gearbox oil each 15 enginehours and I used to change the oil filter once at 30hours. i used to get my bike to the track as itself at about 75kmh at the 5500-6000rpm with 13/45 gearing.. in case of traffic jams. so it sounds like constant speed at the middle area of revs. I can't stand to keep riding more than a minute at high revs - the enginge screams so loud and I can't keep that way anymore)) but at the supermoto track I used to run up to 8000-9000 rpm area , and keep that rythm for about 5-10-15 secs before I starting to use brakes and throw the throttle to pass the turn... well, does it sound enought? does it make any sence? the question is - what's the total lifetime of piston using the bike in described way? if to compare with R-version where normal lifetime of piston is about 60-80 riding hours..