As mentioned in a previous post.... I'm having to replace a valve and piston on a Rebel 250 with only 300 miles on it. I Received the new piston as well as new rings for both pistons. Everything going back together smoothly until I attempt to slide pistons into the jugs. I have pushed, squeezed, wiggled, angled, cussed, fussed, jumped up & down, etc... trying to insert the pistons. Alas I ended bending rings on both pistons. I have installed rings & pistons on many, many jet-ski and boat engines and NEVER ran across anything so stubborn as this beast. That said.... What am I missing here??? Is the 250 motor so different from the traditional small engine that it requires some sort of special hocus-pocus. Does anyone know of a you tube (or other) video out there showing the appropriate procedure for this particular engine??