57-1715 Triumph Pre-unit gearbox drive sprocket 19 tooth 19T 650 500 twin crimp This will fit Norton Commando

This will fit Norton Commando 750 1968-1973 and 850 1973-On

This product is New - Triumph mesh air scoop

all singles 64 and up

This product is New - Clutch Thrust Washer Early 1960 61 62 63 64 65 66 67 & 1968 Triumph 57-1735

This reason is more because if the gap has moved that much you know the knife edge of the rings is worn and or rounded

57-1715 Triumph Pre-unit gearbox drive sprocket 19 tooth 19T 650 500 twin crimp This will fit Norton CommandoYou will get the brand new Gearbox sprocket that is pictured. 57 1715 Triumph Pre unit gearbox drive sprocket 19 tooth 19T 650 500 twin Condition: NEW Warranty: YES Part Brand: STEADFAST CYCLES Surface Finish: STEEL Manufacturer Part Number: 57 1715 Brand: STEADFAST CYCLES