Just thought I toss my 2 cents in the ring!
My scoot sounded like the valves were out, sooooooo, at the 500 mile service I checked them,perrrfect!
Fired up, hmmmmm, still there.
Turned out my primary drive chain was loose.
On the other side of the engine, it kinda sounds like a valve rattle!
Or? Maybe it was just my 2 metal knees rattling!
Scare Crow, what he saying?
Oil can! Oil can!
Joe
I ride, therefore I am!