Lol, we used to be at war wIth scooter. People here REALLY hated them. As mopeds are superior in our twisted minds.
Don't worry bout it, it's still fresh in some people's minds.lol
But yeah call them mopeds....anyway
The 13/13 ain't gonna help much if you don't bore out the intake and patch to match the carb. Some Vespa bikes here had intakes as small as 7mm!! Soo yeah might wanna check that out.
Also, you need to rebuild your bottom end, or at the very least new crank seals.
You should just do the port matching. 1/2 hour with a dremel, c'mon man.