I have a Benelli Dynamo I am working on. It was and still is missing many many parts and I am slowly trying to source what I need. I believe the original 65cc engine from the 1970 model used a Dellorto ME15BS carb and I picked one up fairly reasonably in good condition except that it was in parts in a bag. I have reassembled it and the only thing I think is missing is the Choke plate. In looking at many others for sale the choke plate seems to often be missing. Would people be discarding them because the stick? I feel like I should be able to get the engine running without one by just closing off the intake ...is this correct? But my real question has to do with the ME carbs. There are variations and the most common seems to be the ME18bs. It appears to be identical in terms of components and the only parts diagram I van fine for the ME carbs seems to not differentiate between the ME 15 and 18. I have fond an ME18 online and am curious if I can use the choke plate from it and will it work on my ME15? What is the difference between th 15 and 18 designation....does anybody know for sure?