This thing runs like a dream. If your thinking about buying a dirtbike buy a 1995 kx 125, because it never needs bored out,because in 1995 they coated the inside of the piston walls with something, so the worst that can happen is that you need new rings or it needs recoated,you can get it bored just a little bit but if you do it to much, you will ruin the engine. this bike has got enough power for anybody.