68-45 drive ratio. This is a bolt-in belt drive kit that will fit inside the OEM primary housing, without much modification. Designed to be used in rear belt drive applications but will also work on models that run rear chains. Comes complete with an E.T.C. ball bearing lock-up clutch clutch assembly with Aramid plates and a sealed primary bearing.

Note: See 518911 for the Aramid, replacement belt 138t., 8mm, 41mm wide.