BOLD MAGENTA part numbers are new for 2026 BELTS, CHAINS & SPROCKETS PARTS-UNLIMITED.COM ATV/UTV | 2026 717 FITS MODEL GEARING FRONT SIZE FRONT PART # REAR SIZE REAR PART # HONDA ATC250R 86 13/39 13 GR R308-520-13 36T R223-36 TRX250R FourTrax 86-89 13/39 37T R223-37 38T R223-38 39T R223-39 TRX250X FourTrax 87-88, 91-92 - - - 36T R223-36 TRX300EX FourTrax/Sportrax 93-09 37T R223-37 38T R223-38 39T R223-39 TRX400EX FourTrax/Sportrax 99-04 13/38 16 GR R279-520-16 36T R223-36 37T R223-37 38T R223-38 39T R223-39 TRX400EX FourTrax/Sportrax 05-14 14/38 13 ST 1212-0246 36T R223-36 14 GR 1212-0247 37T R223-37 38T R223-38 39T R223-39 TRX450R/ER 04-14 14/38 13 GR R253-520-13 36T R223-36 13 ULG R253U-520-13 37T R223-37 14 GR R253-520-14 38T R223-38 15 GR R253-520-15 39T R223-39 KAWASAKI KFX400 03-06 14/40 13 ST 1212-0047 40T R203-40 14 GR R432-520-14 15 GR 1212-0049 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 prevent mud buildup and increase wear resistance •Certain models available in ultralight design for a 10 to 15% weight savings REAR SPROCKETS •CNC-machined from a specially enhanced 7075-T6 aluminum alloy •Machined self-cleaning mud grooves at each tooth to help prevent mud buildup and increase wear resistance • Ultralight design is 66% lighter than steel, yet incredibly durable • Silver available for all models; black, blue, red and orange anodized finish available for certain models • #1 sprocket used in supercross, motocross and offroad throughout the world FRONT SPROCKET KEY: GR = GROOVED ST = STANDARD UL = ULTRALIGHT ULG = ULTRALIGHT GROOVED SPROCKETS continued on next page.
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