I have a 2005 crf250x, i used to ride it on trails, now iv taken off my pants goin balls out on it. I love speed and scary to ride stuff, so im totally decking it out to make it better than the R model, but with a light and electric start. Im tryin to get it to pull up in all gears if i can. I dont really need a top speed as much as i would want a fatty roost and big wheelys, no more than 50 or 60, but i want to be able to pull it up in all gears and me able to take it to the track and own some. What about the Ice cube bore kit? Are bore kits that hard to install? I totally stripped my dirtbike down when i did some other stuff to it, rejetted and everything else no problem and i used to be a mechanic at a chainsaw and small engine shop. As far as cams, i mean shimming them and getting them perfect, i plan on getting a more heavy duty valve kit(know of a good one?), are cams that hard to install?