RK / Driven Yamaha YZF-R1 15-21 Aluminum Race Chain and Sprocket Kit
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All 520 Steel Quick Acceleration Kits feature RK's premium RX or XW-ring sealed racing chain in either gold or natural finish. Kit includes premium Driven steel alloy black case hardened rear sprocket paired with a Driven steel case hardened front sprocket. RK's 520 Steel Quick Acceleration Race Kits combine the enhanced performance of race gearing and durability of steel components.