Hello. This is the first time joining a forum. I am getting ready to build an engine for a 2003 RC. I am trying to nfind out if any one out there knows what materials the internals are made of. For example, are the rods, pistons and crank cast or forged? I'm also trying to find out if the exhaust valves are made of stainless. And also, does anyone make good hardcore rods for this bike. Thanks to all that can help me with these questions. Thanks a million and ride safe.