LOW COST FREIGHT !!!!  and immediate delivery.
 
Front Sprocket, K070-038, 420 pitch -10 Tooth for 17mm Shaft. This sprocket is held on with a circlip or nut.
 
Thanks from Supercheap Motorcycle Parts (Australia). Australian owned, with 100% replacement warranty and good old fashioned  service and advice if you ever need it, please spread the word.