Atomic Reed Valve on Rapido

[CHRIS in MARGATE]

Too much spitback on my current set up so I want to reed valve a 225 Rapido I bought last year.
Just drilled 2 holes in a holed piston without problems so no worries there.
What is the difference in performance between the Atomic Mini and Atomic full size assembly ?
How big a carb will they accept ? I normally use my Koso 30mm which has an external spigot of 38mm and I have another new 30mm Koso power jet with a 34mm external measurement across the spigot.
Any advice gratefully accepted as I come into the 21st Century.

[gerryjunior]

http://www.mbscooters.co.uk/info/mb-*-t ... g-+80.html hope this helps.

[CHRIS in MARGATE]

Thank you for taking the time to answer, it is appreciated.
I have read this several times so I guess my next question to the membership is: who is using a Shorty and how does it sit ?