Moto Guzzi Quota 1000 and Quota 1100 ES models
Thanks to Charlie Taliaferro for providing this information on the Yahoo! Guzzi_Quota news group. In Charlie's own words:
The fuel injectors are Magneti Marelli IW031, and should measure around 16.2 ohms (mine measured 17.2 ohms). They are rated as 270cc/minute.