lol at this thread.
80 metra small port is the way to go dude. lots of power, much easier to tune and more forgiving to fuckups. yes the gila is awesome but not that much more awesome.
the hard part is tuning a multi jet carb. reading up only helps a little. experience and knowing the sound of a 2 stroke is the only thing that really helps.
portmatching is not hard at all if you have any experience with power tools. especially if you have engineering experience!
dont mind the other people naysaying dude, the ambiguous nature of the most common question asked on these forums is"what kit should i get for my e50?"
you didnt give us much detail when you asked the question so we would just assume that you didnt do a search and you dont know much about mopeds.
even the best of us sieze kits while installing. thats why especially on your first kit, its a better idea to go with a cast iron cylinder like the metra. the polini and gilardoni are toast once you sieze due to the nickasil plating.