I have a KTM 125SX, and im looking to get a four stroke. A guy wants to trade his 2000 yz426 for my 125. Its not the power i'm worried about, i know i can work up to the 426 power, but im just wondering if i would be loosing anything. Is there some pro's and con's about the 2000 426? Do you think i would have any troubles with it? As far as breaking down and stuff like that?