RENTHAL Sprocket - Yamaha - 13 Tooth 257--520-13GP A-1 Pro Chest Guard adding reinforcement where needed without

adding reinforcement where needed without increased weight or shell thickness

Includes ceramic coated cylinder

Include shields

This ZX10 exhaust system was developed using the same technology that has powered Monster Energy Graves Yamaha riders to 7 straight consecutive Moto America / AMA Superbike championships along with numerous 600cc titles

RENTHAL Sprocket - Yamaha - 13 Tooth 257--520-13GP A-1 Pro Chest Guard adding reinforcement where needed withoutCNC machined from case hardened and core refined 655M13 nickel chromium steel Machined self cleaning mud grooves at each tooth to prevent mud buildup help increase wear resistance Ultralight design has a 10 15% weight savings