The Tillotson 212R uses a Non-Hemi Head with 27mm Intake and 25mm Exhaust similar to the Predator 212 Non-Hemi but with dowel pin holes for the standard Honda or Clone. Here are all the OEM valve train and components for the Tillotson 212R Head.
Note: The Tillotson 196R, 212R and 225R all use the TIL-1/JT-207 casting. The difference will be the valve sizes and guides. The 196R uses 25/24mm valves with 5.5mm guides and the 212R/225RS uses 27/25mm valves and 5mm guides.
