I think he has a tonti bassa (just guessing) so the TPS is on the bottom of the throttle body on the left.
I did post this hastily before I went to work and yes there is more to do such as bypass screws, idle balancing and midrange balancing after setting the TPS. I was not trying to give a complete guide as to how to do it, just to mostly point out that a number of other things need to be addressed before getting into Guzzi Diag.
I would recommend reading the thread you linked as well as googling it to read several other extensive threads on this.
This is a good one to read too.
http://bradthebikeboy.blogspot.com/2012/10/throttle-position-sensor-setting_21.html
I read and printed out about a half dozen guides/how to's before I attempted my first TPS reset/TB sync.
I followed Meinolf's recommended settings for my Tonti frame 1100s.
Oh, gosh . . . I totally missed that Bassa reference.
Seems I am the hasty poster!
Well I am on a site that is focused on another model. Right now I'm kind of thrashing around trying to learn how to use Fuel Injection diagnostics and tuning. I am leaning and moving in a positive direction. I've learned that I can't adjust my idle speed by turning a screw on a carburetor. I'll go back out to my garage and save the map that I have so I don't leave myself totally in a bad way if a mishap occurs.