Werner,


The MVVS carburettor is not a copy of the Webra carburettor, but the 13 mm spigot models are a drop-in replacement for Webra carburettors, which may also improve the performance.

MVVS engines are set up tp run on 0-5% nitro, but there has been talk here that some models, destined for the USA, have a larger combustion chamber, making them suitable for 15% nitro.

What you buy in Austria is, no-doubt, set up to run no-or-low nitro.