I took the bike for a short trip into town to buy a replacement bulb (about 10 miles), and it started pinging rather noticeably. My first thought was the oil, so I pulled over, killed it, and checked the oil.  It looked ok.  And it's only got about 1300 miles on the oil change.  I still went on and added about a third of a quart to it.  Fired it up, and it pinged, almost like something rattling loose.  But the pinging seemed to be coming from inside the top of the motor.  I tried to track it down but had no real luck.  It seemed to mellow out after a while.  Could it have been the oil, even though the level wasn't low.  About 3/4 of the sight glass was full......  This is Texas, 70+ degrees, and I'm running 5w-30.  Is this the proper oil, proper level, and such??? ???

I generally run 93 octane.  But, now that you mention that, I realize it finally mellowed out about 5 miles after I gassed it up again.  Maybe it just had some bad gas in it.  Thanks for the reply.

I'm due an oil change, so I'll change to 20w-50.  Thanks.