15T front drive sprocket for Lambretta J + Lui models for up-gearing when tuning

15T front drive sprocket for Lambretta J + Lui models (for up-gearing when tuning).

This is the complete list of all possible front drive sprocket & clutch crownwheel sprocket combinations for all J-Range and Lui-Vega-Cometa models, complete with the required length chain.

Casa part no X29

45T Clutch crown wheel sprocket
45T clutch sprocket + 11T front sprocket = 73 link chain
45T clutch sprocket + 13T front sprocket = 74 link chain
45T clutch sprocket + 14T front sprocket = 74 link chain
45T clutch sprocket + 15T front sprocket = 75 link chain
45T clutch sprocket + 16T front sprocket = 75 link chain

46T Clutch crown wheel sprocket
46T clutch sprocket + 11T front sprocket = 73 link chain
46T clutch sprocket + 13T front sprocket = 74 link chain
46T clutch sprocket + 14T front sprocket = 75 link chain
46T clutch sprocket + 15T front sprocket = 75 link chain
46T clutch sprocket + 16T front sprocket = 76 link chain

47 Clutch crown wheel sprocket
47T clutch sprocket + 11T front sprocket = 74 link chain
47T clutch sprocket + 13T front sprocket = 75 link chain
47T clutch sprocket + 14T front sprocket = NO!
47T clutch sprocket + 15T front sprocket = NO!
47T clutch sprocket + 16T front sprocket = 76 link chain

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