Welcome to the site !!
I guess my question is , what is wrong with your engine ?? , my 06 has the original piston , clutch , etc , only thing ever changed was Intakes to Stainless and a HotCams Stage 1 to put the power where I needed it , the engine has never given a issue other than valves within the first year , have not had to do ANYTHING to it since , except put gas in it and change oil , it is the most trouble free bike I have ever owned ...