My 95 pw80 is making a rattleing noise even after i put in a new piston and rings a day ago, Pretty much ony like 1 hour of running time on it sense rebuild. It needed a piston because i notice a lost of power and when i took the piston out it was all burnt and some very small chips out of it pretty much scrapes. But this rattling noise is still there. Bike runs good as you can hear and idles all day if i let it and has power. Now maybe this is normal cause i cant remember 18years ago when i got it new lol i also just listen to others and it seems like they have it to? is that a normal pw80 sound? Also i run 32.1 mix cause i took the oil injector gear off and took the oil tank off and plug the holes. Figure i ask you guys:) also heres the video i posted on youtube of it idling with the noise.