Upgrades stock belt drive to chain drive Retains stock cush drive isolator Heat-treated and coated for added durability Custom steel rear sprocket, includes 25-tooth front sprocket Sprocket ratios comparable to stock gearing High-quality O-ring chain recommended Replacement rear sprockets sold separately, 54-tooth part 1210-2493, 51-tooth part 1210-2494 Made in the U.S.A. Requires 130-link 530 chain (sold separately). SPROCKET CONV KT 09-20FL