I have a sachs with a 505/1d. im pretty sure the 12mm on there is not enough for it. would a 14mm bing from a puch be better? would it fit on my manifold? The carb says bing 18 on the side. does the 18 mean anything because its suppsed to be a 14mm. Ive seen the round puch bing and herd that it can fit on sachs but this one is more square and i didnt know if it would work. do the puch bing jets that are available everywhere work with it? Thank you