Hy guys, I've been a great reader of all your posts here in the forum. I never had to post anything since now. I used to own a 2003 WRF450 that I put onto road in the summer. A few weeks ago, me and friend went to the New Brunswick, in Canada, we are from Québec. During the journey, my bike start to do some clacking noise like when your valves need to be adjusted. The sound was going worse and it became really unpleasant. Monday morning, we decide to take my bike to the nearest dealer, in Moncton. There was 3 km left qhen the engine staled. Enough gaz, enough of all, the engine was dead. So here we are, the dealer take a look and tell me that no wrf450,426,250 crank bearing would be enought strong to support my type of riding, street use. By the way, I had put two more teeth on the counter shaft sproket. He told me that he's rebuilding many of this wrf crankshaft & bearing because people are riding their bike at constant speed for long time, even on the long rocky montain trails. I new that this motor was not specialy designed for that type of road and that's why a was never running at constant speed, releasing the gaz and turning it often. I'm really not rough on the mecanic. I was really surprised that nobody else on this forum as already got this problem on his bike also. Maybe I never saw the post he had writen too. Finally, I let my bike to the dealer with its bill of about US$900 and shop for another. That's where I found my new 0KM KTM SM '02 that was much cheaper than my WRF450 with all the stuff on it, US$5000. I had look for ktm before buying my exYamaha, but it was way more expensive. I should have met this ktm dealer in Moncton before! So this was my first story and maybe the last on this forum unfortunatly. Thanks guys for your posts!