Rajo Model BB

This is a Rajo Model BB OHV conversion head with the Chicago accessory transmission. Rajo is an abbreviation for "Racine Joe." This engine features an American Bosch ZK4 cross-drive Magneto. Frontenac deep-sump oil pan, a Brass Master carburetor by Harry Miller, and a pressurized oiling system. 
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• Block - Model T
• Head - Rajo Model BB
• Cam Design - Standard
• Valve Design - Overhead Valve
• Production Date - c. 1920s