The single biggest improvement you can make to the shift action of your V11 is to lengthen the shift lever arm and incorporate a new eye end mount hole 12mm ctr to ctr from the original upper hole. Shortens up the shift action to Japanese bike standards and gives the gearbox return spring greater leverage over the shift lever.
It also makes the shift action a little bit stiffer which means you need a little more load on the lever before it shifts gear which makes for a faster cleaner shift.
BB, I looked again at the old/improved transmission cover pictured back on page 1. The old (unpainted) cover has a boss in the casting where the hole for the eccentric bolt would be drilled and the area around it machined for the lock nut. My cover is painted black & has the hole & machined area where the eccentric should be. A brass plug is screwed into the hole. What does the upgrade kit that Guzzi had include? A new cover drilled, machined & tapped + the eccentric bolt &nut