Triumph Sprocket Cover Seal 1963-67 70-4578 New sprocket cover seal for Triumph 650 twins. Will fit all unit 650 models including Bonneville, Tiger, Trophy, etc. from 1963-67.
The Triumph Sprocket Cover Seal 70-4578 is a specific oil seal designed for the sprocket cover behind the clutch on certain Triumph and BSA motorcycles. It is a brand-new oil seal with an outer diameter of 1 3/8 inches. This seal fits Triumph models such as the T120 and TR6 from 1963 to 1967, as well as the Triumph T100 up to 1967.
This oil seal is used in the four-speed gearbox sprocket cover to prevent oil leakage around the clutch trap door area. It’s a common replacement part for maintaining the integrity of the gearbox oil sealing.
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