A Couple of links!

[ciaoflyer]

Some good stuff about the 126 aircooled and BIS:

http://translate.googleusercontent.com/translate_c?depth=1&hl=en&prev=/search%3Fq%3DLa%2Br%25C3%25A9fection%2Bd%25E2%2580%2599un%2Bcarburateur%2BWeber%2B30%2BDGF%26hl%3Den%26safe%3Doff%26client%3Dfirefox-a%26hs%3DnXo%26rls%3Dorg.mozilla:en-US:official%26prmd%3Dimvns&rurl=translate.google.co.uk&sl=fr&u=http://ilcubopiccolo126.free.fr/index.htm&usg=ALkJrhiGH6IjJFU-WywbvpAs7EWf180T_A

A page on how to rebuild the BIS carb:

http://translate.google.co.uk/translate?hl=en&sl=fr&u=http://www.pouleto.ch/fiat500/%3Fp%3D332&prev=/search%3Fq%3DLa%2Br%25C3%25A9fection%2Bd%25E2%2580%2599un%2Bcarburateur%2BWeber%2B30%2BDGF%26hl%3Den%26safe%3Doff%26client%3Dfirefox-a%26hs%3DnXo%26rls%3Dorg.mozilla:en-US:official%26prmd%3Dimvns&sa=X&ei=52t9UN6TC4qp0QWJhoDACw&ved=0CCkQ7gEwAA

[Hazey-n-Marc]

Good find. Cheers Ciao