that looks pretty close to a magnum top end performance wise, but i cannot see it and hold it and compare.
if i was gonna run that id run a delorto 16mm carb, def enought for that little guy.
the advantages to that are, its a new cylinder, its made by puch, and its got the flat exhuast ports so you can run a reg pipe.
I still think for a first time tuner a 19.5 is to big
the 16mm is a simpler setup as well.