Many thanks to Uwe Reißler for pointing out some errors with the Quota 1000 wiring diagram and sending a better scan than I had originally. Many thanks as well to Ron Komoroski who not only supplied the wiring diagram for a 1982 125 Terrotereno, he sent the entire manual! I scanned the entire thing just for posterity.
1982 Tuttotereno at GuzziTech
1982 Tuttotereno at ThisOldTractor (Greg Bender)
1991 Quota 1000 (updated 8/1/10) at GuzziTech
1991 Quota 1000 (updated 8/1/10) at ThisOldTractor (Greg Bender)
1982 Tuttotereno at GuzziTech
1982 Tuttotereno at ThisOldTractor (Greg Bender)
1991 Quota 1000 (updated 8/1/10) at GuzziTech
1991 Quota 1000 (updated 8/1/10) at ThisOldTractor (Greg Bender)