Designed to work with a mikuni carburetor. You will have to modify the intake flange for a Keihin carb.
The item "1973/1974 Honda CR 250 Elsinore Mossbarger Reed Cage" is in sale since Wednesday, December 14, 2016. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Antique, Vintage, Historic". The seller is "dcplastics" and is located in Sebewaing, Michigan. This item can be shipped worldwide.