Hi everyone, I got some down time due to track injury and need to do a rebuild on my motor. I read the stickies and even jumped around a bit looking at engine builders in socal, but the application of my 450 is unique. Bare with me as I know not everyone agrees with converting a dirtbike to a road race bike, however, that's what I did. I'm not beyond doing most of the work myself when I can use my left arm again, but I wanted to get suggestions from some of you vets/pros. I have a otherwise stock engine with low hours, took possession in 2010 and the engine had about 60-70 estimated with rec riding. I've probably added a brutal 7 hours as the bike sees WOT for periods of about 10-15 minutes. The engine still runs strong with no knocks or pings, but a good check is in order, I'd like to add hi quality parts for longevity's sake. I don't care for any added horsepower so larger bore is out. What I want to do is basically replace some of the internals with high quality Ti parts like the valves. Maybe I can do the cam as well. I read that a fair amount of you have gotten 100+ hours on the piston so I'd like advice on whether to go aftermarket or stick with OEM? What I don't want is for a catastrophic failure to put me on my face after I heal this time around. If you have any good experiences with a builder in socal (I'm in the hi-desert area) or advice as to what components I should swap to take this level of abuse, I'd like to hear it. Thanks in advance for any experience you share.