I'm after a KDX 250E top end to replace my sr model, the sr doesn't have the main ex' valve to alter the port timing only the side drum valves.Because of that the port timing is different and the only decent power is between 5000 to 7000 rpm. I'm in Melbourne Aus'.Also need an early 90's frame for KX 250.Will try and build it a bit lighter, it's 297 lb now with a full tank.