Hi so on my 2000 900 ss I.e I noticed at red lights it seems to be running on one cylinder....and I here that bub bub bub normal chug on and off....when the bike is really rode for a hour it’s a bit better but still sounds like it....instead of a steady , bub bub bub bub bub....it’s like “ bub....bub....bub....,bub bub bub....bub bub.”.hard to put in words...ha ha ...my first ducati and my tac is not working so I really don’t know what a normal idle sound is and at what rpm I am at ...
If I turn my “choke “ up it sound s fine and even....I gotta change plugs since I just bought it but I mean otherwise it runs great...so it seems thanks!

It should sound like a Harley chub chub. Check the HT leads and plug caps, then balance the carbs and adjust the tick over, to about 1000 rpm.

I just realized I posted this on k100 forum instead of the Ducati forum..ha ha ..thanks for the response though !