guzzidude1100i

I'm having the same problem with a set of modified mufflers. I had a trusted Guzzi mechanic adjust the EFI balance and set the TPS but he said the "trim" at idle would not go any richer. I have a terrible hick-up and stumble at idle and anytime I have rolled off the throttle and try to pick the throttle back up it stumbles. Will a Dynojet fix this or is a remapping in order?

Can someone tell me if it is possible to remove the injectors (to be cleaned) without removing the throttle bodies? I can not find the procedure for removing the injectors, I was told there is a plastic band covering a clip that holds the injector in place. That is not much to go on, any help or photos anyone might have would be much appreciated.