Keihin CDK carburetors are designed for use in racing motorboats and motorcycles, and brands such as Harley-Davidson, Kawasaki and Yamaha all have used this particular carburetor. The Keihin CDK carburetors have been discontinued, but the company still offers replacement parts and repair kits. Determining which particular carburetor you have is easily done, as you can either check yours against images from their website or ask a distributor about your serial number for an exact identification.
Identifying by Appearance
Go to the website for Keihin Fuel Systems, Inc: keihin-us.com.
Click on the “Products” menu to see images of all their available carburetors.