Guzzi must have been doing some strange things in 2000, The ECU I just replaced in a Bassa was for a Quota. I wonder if it was one of the defective Quota ones (remember the bad barometric pressure sensor in the ECU) that got sent back to Italy and came back re-worked for a Bassa. The label read Quota, a sticker on the back had "CAL" on it. This is the second ECU I've replaced in a year on about 10 year old bikes. I'm wondering if about 10 years out is the back side for the bath tub curve for these 15M ECUs.