Right ra­tio

Classic Bike (UK) - - Classic Workshop -

Both Norvil’s Les Emery and John Dunn from the Nor­ton Own­ers Club tell me that an Smiths an­ti­clock­wise speedo drive is avail­able. It’s pro­duced for the 850 Com­mando, but it was worth me go­ing to the trou­ble of con­vert­ing a clock­wise one to an­ti­clock­wise (CB Fe­bru­ary), be­cause the late Com­mando used Veglia clocks so the drive ra­tio is 1.25:1; the Norvin’s chrono­met­ric speedo needs 2:1 – be­sides, it saved me the cost of buy­ing one...

Drive box ra­tios are cast or stamped in the speedo hous­ing

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