pinging noise
im in the process of putting an 87 warrior together and after i put a new stator in it i started it, and keep in mind this bike has not been started for about 3 years but when i started it i noticed a kind of pinging noise and it sounds mettalic and i was wondering if anyone has any ideas as to what it is. I have already put quite a bit of money already and that sound worries me it sounds like its coming from the top end and it sounds like its coming from the exaust valve. I was wondering if anyone else has had this prob? Thanks everyone