Originally Posted by merdith6

It required some googling and a translation. This is all I found...

Novarossi Buggy COMPOSITE CARBURETOR 7MM (24065)
This composite carburetor was designed to perfect the changes in engine crankcases 2012 Novarossi PLus 4BTT and Bonito. Work on improving the dynamic flow admission was on the cover, but also on a carburetor adapted to modern engines.
With unmatched power, Novarossi engines are often used with Ventury 5.4 mm or 6mm. The carburetor has been redimenssionné 7mm for utilsation of these inserts.
This carburetor specially designed to offer Buggy escalation necessary to control off-road

It provides:
• More progessivité and accelerations clearer
• Less consumption
• Improved flow
• An optimum efficiency with the nozzle 5.5 mm, 6mm, 6.5mm