backfiring

Hey guys, Long time reader of these forum post but this is my first time posting I have a 73 TX650 that I just finished doing a bunch of upgrades on (mosfet regulator rectifier, battery, xscharge electronic ignition gen II, battery box, counterbalance seat, special tank with new paint, and new...

so-- I just got this bike that had been siting for a couple years. So far I have cleaned the carburetors, on which i replaced the float gasket, filled the tank with new gas and also got a new battery & spark plugs. The bike is starting and idles well after an adjustment but is backfiring when...

1979 XS650 w/ 2 sets of points and coils. Seems to be only at idle, but not great.perhaps even too slow. I haven't connected my inductive tach but the tach on the bike shows less than 1000RPM. It backfires out of right cylinder. Right exhaust is also quieter than the left. I haven't checked...