This kit includes a DID 525VX3GB x 124 gold x-ring chain and JT silent sprockets, suitable for the CRF1000 Africa Twin DCT and CRF1000 Africa Twin models. Honda CRF1000 Africa Twin. JT sprockets are made using only the best available materials.SCM420 chromoly steel alloy for front sprockets, and we are the only sprocket manufacturer using the ultra-durable high carbon C49 steel for rear sprockets.