RK Racing Chain 3136-990W Steel Rear Sprocket and 530GXW Chain 20,000 Mile Warranty Kit Fits: Suzuki GSX1300R (Hayabusa) 99-07 20,000 mile warranty kit contains: 17 tooth chromoly front sprocket; 40 tooth steel rear sprocket; and RK 530GXW-112 link chain Sealed XW-ring chain features heat treated high carbon alloy steel components with seamless rollers and shouldered bushings providing the user with a 50 percent longer wear life than basic O-ring chains XW-ring uses an advanced nitrile butadiene composite and features three contact lips and two convex outer stabilizers; this means three lubrication pools to protect against high speed abrasion, extreme heat build up, torsional flex and loss of lubricant This high mileage performance kit features precision cut case hardened steel sprockets with matched OE gearing and RK's XSO or XW sealed ring chain; warranted to provide 20,000 miles of street use (racing and chain neglect will void warranty)