Ok heres the story. I just put new SS valves and springs in my top end. The first ride it was great the whole time i was riding it. Tonight i went out to a local track and after my first stint.. Id say about 5 laps for warm up I heard a really bad ticking sound almost slapping. I let it cool down and when i went to start it up it was soo hard to kick like the auto decomp lever wasnt working. It will kick but it takes a heavy boot to do it.. but it wont start. So im open to any suggestions.. but im going to open it back up tomorrow. Oh yeah its an 03 450R. And i change the oil every 3 rides.. as a matter of fact i changed it the day i took it out the first time after i put the new valves in. And put a brand new air filter on it.