Apico Beta Rev3 125 (428 CHAIN)/Evo 80/Rev 80 4 Bolt Hole Rear Sprocket.
This sprocket is for the Rev3 125 or Senior/Big Wheel Evo 80/Rev 80 with the 18" rear wheel.
Please check before ordering that your sprocket is the 4 bolt hole type and not the 5 bolt fixing type.
This sprocket is a 428 gauge for chain selection.