been dooing some resarch about the last post I put up about a lt250 (I think its a 89) not having a powerband like most 2 strokes, there is no surge in it. I believe now that it is the powervalve or exhaust valve, they might be the same thing I dunno? I think it is sticking, how do you fix this, do you have to tear the entire engine down? need some help, thankx.