BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | ATV/UTV BELTS, CHAINS & SPROCKETS 740 FITS MODEL STOCK GEARING CHAIN SIZE FRONT SIZE PART # REAR SIZE PART # SPROCKET TYPE YAMAHA (CONT) YFZ450R 09-24 YFZ450R SE 12-23 YFZ450X 09-11 14-38 520-98 13 1212-0865 37 1210-1459 (Steel) 14-38 520-98 14 1212-0866 38 1210-0016 (Steel) 14-38 520-98 15 1212-0867 38 1211-0270 (Works) 39 1210-0017 (Steel) 40 1210-0018 (Steel) 41 1210-1048 (Steel) 42 1210-1049 (Steel) YFM660R Raptor 01-05 13-40 520-92 12 1212-0450 40 2-367940 (Steel) 13 32513 40 5-367940 (Works) 14 32514 41 2-367941 (Steel) 15 32515 42 2-367942 (Steel) 16 32516 44 2-367944 (Steel) 46 2-367946 (Steel) YFM700R Raptor 06-24 (all) YFM700R Raptor SE 13-23 (all) 14-38 520-98 13 1212-0865 37 1210-1459 (Steel) 14-38 520-98 14 1212-0866 38 1210-0016 (Steel) 15 1212-0867 38 1211-0270 (Works) 39 1210-0017 (Steel) 40 1210-0018 (Steel) 41 1210-1048 (Steel) 42 1210-1049 (Steel) FITS MODEL GEARING FRONT SIZE FRONT PART # REAR SIZE REAR PART # HONDA ATC250R 86 TRX250R FourTrax 86-89 13/39 13T R308-520-13 36T R223-36 13/39 37T R223-37 38T R223-38 39T R223-39 TRX250X FourTrax 87-88, 91-92 TRX300EX FourTrax/Sportrax 93-09 - - - 36T R223-36 37T R223-37 38T R223-38 39T R223-39 TRX400EX FourTrax/Sportrax 99-04 13/38 16T R279-520-16 36T R223-36 37T R223-37 38T R223-38 39T R223-39 TRX400EX FourTrax/Sportrax 05-14 14/38 13T 1212-0246 36T R223-36 14T 1212-0247 37T R223-37 38T R223-38 39T R223-39 SPROCKETS FRONT SPROCKETS •CNC machined from case-hardened and core-refined 655M13 nickel chromium steel •Machined self-cleaning mud grooves at each tooth to help increase wear resistance •Certain models available in ultralight design for a 10-15 percent weight savings REAR SPROCKETS •CNC machined from a specially enhanced 7075-T6 aluminum alloy •Machined self-cleaning mud grooves at each tooth to help increase wear resistance • All rear sprockets are the ultralight design, making them 66 percent lighter than steel, yet incredibly durable •Available in silver • Top sprocket used in supercross, motocross and offroad throughout the world SPROCKETS (CONT)
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