Good quality rear Indian Lambretta crown wheel with 48 teeth. This non standard sprocket is Suitable for series 1,2 and 3 Li, SX, TV and GP, DL scooters to change the final drive ratio gearing to work with certain gearboxes, kits and exhaust pipes. You can't fit standard clutch plates and steels into this, but it has been machined so the bottom cork sits deeper so it's not too tight - Always check clearance on the 'ears' before fitting. 
 
Comes without the bush or needle rollers, these are available on this website.