KTM 125 SX Parts & Accessories

Everything we stock that fits the KTM 125 SX (2023–2026): 31 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 125 SX

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 125 SX

Renthal Front Sprocket Grooved 14T — 6 Makes — (PN 292--520-14GP)Renthal Front Sprocket Grooved 14T — 6 Makes — (PN 292--520-14GP) $34.16 Renthal Front Sprocket Grooved 14T — GasGas/Husqvarna/KTM — (PN 292U-520-14GP)Renthal Front Sprocket Grooved 14T — GasGas/Husqvarna/KTM — (PN 292U-520-14GP) $43.16 Renthal Front Sprocket Grooved 15T — 6 Makes — (PN 292--520-15GP)Renthal Front Sprocket Grooved 15T — 6 Makes — (PN 292--520-15GP) $34.16 JT Sprockets Steel Front Sprocket — JTF1901.11 (11T)JT Sprockets Steel Front Sprocket — JTF1901.11 (11T) $12.99 JT Sprockets Steel Front Sprocket — JTF1901.13 (13T)JT Sprockets Steel Front Sprocket — JTF1901.13 (13T) $12.99 JT Sprockets Steel Rear Sprocket — JTR897.40 (40T)JT Sprockets Steel Rear Sprocket — JTR897.40 (40T) $36.99 JT Sprockets Steel Rear Sprocket — JTR897.41 (41T)JT Sprockets Steel Rear Sprocket — JTR897.41 (41T) $36.99 JT Sprockets Steel Rear Sprocket — JTR897.46 (46T)JT Sprockets Steel Rear Sprocket — JTR897.46 (46T) $36.99 JT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.51SC (51T) — (seeJT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.51SC (51T) — (see $36.99 Wheel Bearing Kit — Beta RC 4T 450 (2025) + 356Wheel Bearing Kit — Beta RC 4T 450 (2025) + 356 $34.08 JT Sprockets Steel Front Sprocket — JTF1901.14 (14T)JT Sprockets Steel Front Sprocket — JTF1901.14 (14T) $12.99 JT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.45SC (45T) — (seeJT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.45SC (45T) — (see $36.99 JT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.48SC (48T) — (seeJT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.48SC (48T) — (see $36.99 JT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.50SC (50T) — (seeJT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.50SC (50T) — (see $36.99 JT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.52SC (52T) — (seeJT Sprockets Self-Cleaning Steel Rear Sprocket — JTR897.52SC (52T) — (see $36.99

Suspension for the KTM 125 SX

Fork Oil Seal Kit — Beta RR 2T 125 (2019-2023) +Fork Oil Seal Kit — Beta RR 2T 125 (2019-2023) + $18.24 Fork Dust Seal Kit — Beta RR 2T 125 (2019-2023)Fork Dust Seal Kit — Beta RR 2T 125 (2019-2023) $19.50 Fork Bushing Kit — KTM Adventure R Rally 790Fork Bushing Kit — KTM Adventure R Rally 790 $43.59 Suspension Linkage Bearing Kit — Gas-Gas EC125 — 3 Makes — (PN 27-1217)Suspension Linkage Bearing Kit — Gas-Gas EC125 — 3 Makes — (PN 27-1217) $120.65 Swingarm Bearing Kit — Beta RC 4T 450 (2025) +Swingarm Bearing Kit — Beta RC 4T 450 (2025) + $75.40 Fork Oil & Dust Seal Kit — Beta RR 2T 125Fork Oil & Dust Seal Kit — Beta RR 2T 125 $40.57

Controls for the KTM 125 SX

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

Maintenance for the KTM 125 SX

Twin Air Standard Air Filter — GasGas 125 MC (2024-2026), GasGas 250 ECTwin Air Standard Air Filter — GasGas 125 MC (2024-2026), GasGas 250 EC $29.08

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 125 SX, tell us. Accuracy is the whole point.