Add some Dr. Pulley variator sliders for better acceleration, or go the whole hog and install a J Costa variator.
Twist and go gear changing is so last century!
Just the standard Vespa engine, tuned to 45bhp by Roadspeed, nigh on impossible to put a motocross engine into a small frame Vespa, easier to just buy one of these
If that is a photo of the actual scoot I would say it looks good, it looks straight and tidy,
It would make my scoot look slow (which it kinda is) in comparison, yeh I would have one, or something else the same cc, maybe next spring.
Spent a hour and a half attempting to remove the oil filter from a friends bike, got it off eventually, almost destroyed the old filter in the process...