BSA ROCKET 3 TRIUMPH T120 TR6 GEARBOX SPROCKET 18T 63-74 57-1917

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Gearbox sprocket for Triumph TR6,T120 etc 1963-74, T150 1969-72, 4 speed models, and BSA A75 Rocket 3, 4 speed models.

Chain Pitch: 5/8'' x 3/8''
Number of Teeth: 18T

OEM:  57-1917