Yep! It's a super deal. I thought about it a little more and it does make sense to plug up the old intake. Having it open might prevent the necessary vacuum in the case from taking place and thusly nothting would be pulled from the reed valve intake. That's total speculation though. I'm definitely going to experiment a lot with this kit. It's just so cool! I really want to see if I can get dual carbs to work on it. As of now i'm planning for this set up:
-Reed valve athena kit (duh)
-19mm phbg w/ K&N filter (possible 13/13 on the old intake)
-Ciao techno estoril (hacked and welded on to the provided header)
-70cc Polini high comp head
-Polini Variator
This is a total shot in the dark, but I'm guessing I'll main jet somewhere in the upper 70s to mid 80s