KTM 300 EXC Hardenduro Parts & Accessories

Everything we stock that fits the KTM 300 EXC Hardenduro (2024–2026): 26 parts, each verified against manufacturer fitment data, grouped by category. Prices and stock are live. Not sure on year or trim? Use the bike finder to confirm your exact match.

Brakes for the KTM 300 EXC Hardenduro

Master Cylinder Rebuild Kit — Gas-Gas EX250Master Cylinder Rebuild Kit — Gas-Gas EX250 $49.45 Master Cylinder Rebuild Kit — Gas-Gas EX250Master Cylinder Rebuild Kit — Gas-Gas EX250 $37.79 Brake Caliper Rebuild Kit — Gas-Gas EX250 (2022)Brake Caliper Rebuild Kit — Gas-Gas EX250 (2022) $31.23 Brake Caliper Rebuild Kit — Gas-Gas EX250 (2022)Brake Caliper Rebuild Kit — Gas-Gas EX250 (2022) $30.99 Brake Caliper Bolt Kit — Ducati DESMO 450 MXBrake Caliper Bolt Kit — Ducati DESMO 450 MX $15.49 Brake Caliper Piston Kit — Gas-Gas EX250 (2022)Brake Caliper Piston Kit — Gas-Gas EX250 (2022) $47.86 Brake Caliper Piston Kit — Husqvarna FC 250Brake Caliper Piston Kit — Husqvarna FC 250 $26.57

Drivetrain for the KTM 300 EXC Hardenduro

JT Sprockets 520 Steel Front Sprocket, 11T (JTF1901.11)JT Sprockets 520 Steel Front Sprocket, 11T (JTF1901.11) $12.99 JT Sprockets 520 Steel Front Sprocket, 13T (JTF1901.13)JT Sprockets 520 Steel Front Sprocket, 13T (JTF1901.13) $12.99 JT Sprockets 520 Steel Rear Sprocket, 40T (JTR897.40)JT Sprockets 520 Steel Rear Sprocket, 40T (JTR897.40) $36.99 JT Sprockets 520 Steel Rear Sprocket, 41T (JTR897.41)JT Sprockets 520 Steel Rear Sprocket, 41T (JTR897.41) $36.99 JT Sprockets 520 Steel Rear Sprocket, 46T (JTR897.46)JT Sprockets 520 Steel Rear Sprocket, 46T (JTR897.46) $36.99 JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 51T (JTR897.51SC)JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 51T (JTR897.51SC) $36.99 Wheel Bearing Kit — Beta RC 4T 450 (2025) + 356Wheel Bearing Kit — Beta RC 4T 450 (2025) + 356 $34.08 JT Sprockets 520 Steel Front Sprocket, 14T (JTF1901.14)JT Sprockets 520 Steel Front Sprocket, 14T (JTF1901.14) $12.99 JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 45T (JTR897.45SC)JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 45T (JTR897.45SC) $36.99 JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 48T (JTR897.48SC)JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 48T (JTR897.48SC) $36.99 JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 50T (JTR897.50SC)JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 50T (JTR897.50SC) $36.99 JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 52T (JTR897.52SC)JT Sprockets 520 Self-Cleaning Steel Rear Sprocket, 52T (JTR897.52SC) $36.99

Suspension for the KTM 300 EXC Hardenduro

Fork Oil Seal Kit — Gas-Gas EC125 (2025) + 173Fork Oil Seal Kit — Gas-Gas EC125 (2025) + 173 $20.19 Fork Oil & Dust Seal Kit — Beta RR 2T 125 (2024)Fork Oil & Dust Seal Kit — Beta RR 2T 125 (2024) $45.76 Fork Bushing Kit — KTM Adventure R Rally 790Fork Bushing Kit — KTM Adventure R Rally 790 $43.59 Swingarm Bearing Kit — Beta RC 4T 450 (2025) +Swingarm Bearing Kit — Beta RC 4T 450 (2025) + $75.40

Controls for the KTM 300 EXC Hardenduro

Clutch Master Cylinder Rebuild Kit — Gas-GasClutch Master Cylinder Rebuild Kit — Gas-Gas $28.31 Clutch Slave Cylinder Kit with Piston — GasGas/Husqvarna/KTM — (PN 18-6014)Clutch Slave Cylinder Kit with Piston — GasGas/Husqvarna/KTM — (PN 18-6014) $73.31 Steering Stem Bearing Kit — Husqvarna FC 250Steering Stem Bearing Kit — Husqvarna FC 250 $44.60

Fitment is anchored on the manufacturer's own application data and verified before it goes live. If you spot anything that looks off for your KTM 300 EXC Hardenduro, tell us. Accuracy is the whole point.