I bought my bike used and didnt get much information on it other than what you could see. I was going to put in SE203 cams, but when I tore into it, I seen it already had SE203 cams in place. How do I know if the bike has engine or head work done? THanks.

 

If you can't find receipts the only way is to pull it apart and look at/measure things.

 

A run on the dyno would probably give you a hint.