Rear - Front sprockets MJ rear sprocket for Suzuki FR 50 75-86 MJ Corse MJ.719 €25.99 High quality duraluminium (ergal) rear sprocket for Suzuki FR 50 75-86 with chain pitch 420 and with number of teeth from 24 to 54. Select the chain pitch and number of teeth you need by clicking below. Add to cart