Changed 2x1 exhaust to a 2x2 now when i slow down to a stop rpm’sdrop to 650 and bike stalls if i tweak the gas for a sec the idle comes back and is fine only happens when i am riding and coming to a stop when i engage clutch to come to a stop idle drops down and stalls.does not happen when idling at start up.?????

 

Did you run a tuner on it? Very important for modern bikes, all ECM and what not.