This is above my pay grade but...the way to make a Vespa tame the heat probably is the mlm water cooler Vespa head. The perfect solution would be a one way bearing on the rear clutch as in the one way bearing on the front variator of a Hobbit. Then fit whatever cdi u want and forget the fan. That one way bearing requires invention. The Vespa heat is even worse than Hobbit heat.
What kit is on that mallosi points case ? Isn't it cut for a 46 mm kit. Which of course has near zero clearance from one or more studs. What did u use and is your ride hot because of that ?