Ready to change up your gearing or replace worn sprockets on your Yamaha YFZ450R or YFZ450X (2009-2016 models)? This set includes both a front (14-tooth) and rear (38-tooth) steel sprocket in black. Made by Caltric, they're durable replacements that match OEM specs (part number 9383G-14231-00). The front sprocket measures about 77.7mm x 77.7mm x 6.3mm. This combo is ideal for restoring stock performance or just doing routine drive maintenance. Includes both sprackets—everything you need for a sprocket swap. Backed by a 90-day warranty. Note: These are standard replacements, not performance or vintage parts. Always verify your ATV's exact model year before ordering. A straightforward, reliable kit for keeping your YFZ450 running strong on the trails or track.