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Amazon.com: Renthal Rear Wheel Sprocket Black 49T with Keepitroostin Sticker Fits Kawasaki Kx250f Kx450 2004-2014 : Automotive
MX Chain Kit - RENTHAL Sprocket Kit with Choice of Chain - Kawasaki KX 450F '06-20 - SprocketCenter.com
MXA'S 2012 KAWASAKI KX450F MOTOCROSS TEST: AN ENGINE AND A-HALF IN AN IMPROVED PACKAGE - Motocross Action Magazine
$32.95 Renthal Ultralight Front Sprocket 13 For Kawasaki #639727