Hi all, I have a 1980 xs650 with the carbs from a 1976 (Mikuni BS38). I have it starting and idling fine, and to be honest it feels like it's running fine up and down the road, but I am hearing a jingle sound at certain points when I am early on throttle or off throttle while moving. Do these things jingle if they're running lean? Could it be pinging? What's the best way to tell for these old ladies? I've never ridden another Xs650 so I can't be sure how it's supposed to feel. Thanks!