I read on here that the 98 cr 250 had different porting than the 99 and made for a better motor most people voted, i was wondering if i could buy a 98 cylinder and put it onto my 99 and keep all the same internal stuff like the powervalve and piston (66.4 mm) ive gouged the 99 jug and am about to send away for it to get welded and re-plated, but for 40 bucks or so more i can get a new jug, and have options.. anyone know about this??? thanks guys