EUROCKA MJ rear sprocket for EUROCKA MOTRAC 50 4T (después de 2013) MJ Corse MJ.488 €51.51 High quality duraluminium (ergal) rear sprocket for EUROCKA MOTRAC 50 4T (después de 2013), with chain pitch 428 and with number of teeth from 38 to 50. Select the chain pitch and number of teeth you need by clicking below. Add to cart