Hey Robin,
Glad to hear you got it all dialed in. There is not much of a support network for the Morini, takes a little more trial and error, but after dialing in the clutch and getting your pipe sorted you should be good to go.
As for the motor itself, I've had zero, and I do mean ZERO, problems, but I want to fool around with gearing some.
Pat and I run the moped hubs and until now, we've been pretty much stuck with 45 tooth rear sprockets (biggest available for the Puch hubs we run). But Pat has just made these killer new sprocket assy's for the moped hubs and now we can run whatever custom ratio's we want. I am going to run a larger sprocket to lower the overall ratio a bit. Should perk up the little the beast.
Rich