1996 Sportster 1200 Custom, just hit 30,000 miles. First time ever heard 'pingy' noise from underneath primary cover, or so it seemed. Noise was not steady or constant, rather intermittent, ie, every 2 seconds or so it appeared, sort of as if it was (no pun intended) 'cycling' along with the engine as the engine is running. One dealer said loose primary, tightened it; result: noise even worse, seems louder, even more 'defined' and easier to hear. Dealer then said: piston flap; wants $1500. to fix. Second dealer said: sounds like piston; $95/hour to disassemble, diagnose, then take it from there. Third dealer: said primary chain not properly tightened by first dealer, tightened it anew, but noise the same. Third dealer said then said: alternator, as it rotates around round thing that looks like a sprocket, can get noisy/pingy as teeth on inside of sprocket wear. He said no problem to continue riding, even till Springtime if I want!, then bring in for repair. Anybody have any experience with this? Any thoughts? This is very frustrating, yet apparently a very common experience with us Harley riders getting very different opinions from 'dealers'. Just don't know who to believe, never mind who to fix the darn thing. Honda Shadow anyone? Only kidding!!! Thanx for input. Safe riding everyone.