I have a 2001 KTM 125SX, and im wanting to get a four stroke. A guy wants to trade his 2000 yz426 for mine. I was just wondering if i would be loosing anything buying that old of a bike. My KTM is really in exellent condition and runs perfect. Is there some Pro's and Con's with the 2000 426's? Would i have any problems with the bike as far as breaking down and stuff like that?