Just to prove that I am also a member of the duh club! After reassembling my wife's Breva 750 after a clutch job I could not get the bike to run past an idle, stalled every time I opened the throttle. I finally gave up for the day. Worked on it some more the next day, gave up again. Asked some questions here and elsewhere, no workable answers were forthcoming, gave up again. Tried repeatedly to reset throttle position with Guzzi Diag, no go. On the fourth day I found the TPS unplugged, plugged it in, bike ran perfectly! DUH!!!
Brian