For 2-stroke scooters Largest available venturi Good match for older scooters Very affordable repair part Here is the scooter carburetor that is used as standard on most 43cc, 49cc, 50cc, and 52cc 2-stroke engines Our scooter has a 15 mm intake diameter and the largest diameter venturi available for this class of scooter engine Here is the scooter carburetor that is used as standard on most 43cc, 49cc, 50cc, and 52cc 2-stroke engines. Our scooter has a 15 mm intake diameter and the largest diameter venturi available for this class of scooter engine. This scooter carb can be used on all 33cc and above 2-stroke scooter engines. If you need a replacement scooter carburetor for your older scooter, then this is the one you want. Please note that this 15 mm carburetor is completely interchangeable with the 11 mm carburetor. This 15 mm carburetor will give you a little more power compared to the 11 mm carb. Length: 90 mm (3.5″) Width: 76 mm (3″) Mounting Hole Distance: 3