JT Sprockets (JTC420HDR134SL) Steel 134-Link 420 HDR Heavy Duty Drive Chain The JT HDR Heavy duty motorcycle chain is engineered for off-road racing use offering top performance at minimum weight Manufactured using leading edge technology and with only the highest grade of special steel alloys The specifications of the JT advanced power transfer chains meet or exceed the requirements of all modern motorcycles, street, MX, Enduro, off-road, and ATV Use with JT Sprockets to achieve maximum performance