MF the top will fit fine on a standard motor as long as you have the correct shroud. Remember the shroud also has the fuel tank support and this sits higher so it clears the straight shaft manifold and carby, if you fit the off set manifold it will give a bigger clearance over the carby, doesn't matter though. I have one here at the moment that I picked up last week that looks very original and had not done a lot of work and it is a short shaft with the Tornado top on it. If you look at the NOS Victa 2 strokes that are still on ebay they have that top on them