RENTHAL Sprocket - Yamaha - 40 Tooth 437U-520-40GBSI Fork Seal Kit These works rearsets are for

These works rearsets are for track use only

Extended cuff for greater coverage with an integrated closure for security and ease of use

New cuff closure with hook and loop closure for a secure

Prevents dirt from entering the fuel system (cause of fuel pumps and injectors breakage)

RENTHAL Sprocket - Yamaha - 40 Tooth 437U-520-40GBSI Fork Seal Kit These works rearsets are forCNC machined from a specially enhanced 7075 T6 aluminum alloy Machined self cleaning mud grooves at each tooth to help increase wear resistance All rear sprockets are the ultralight design, making them 66 percent lighter than steel, yet incredibly durable