This cable fits model 23 Metralla MK2. The cable drives off the sprocket cover. The cable measures 55 1/2" long. The US models came with Lucas headlights with a 60mm diameter speedometer. This speedometer used the 18mm top nut with the standard 12mm bottom nut. Canadian & European models used a smaller headlight but had the larger 80mm speedometer fitted in it. This speedometer uses the cable with the 16mm top nut and the standard 12mm lower nut.