KTM 125 SX Parts & Accessories

Everything we stock that fits the KTM 125 SX (1998–2002): 54 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 ES 700Master Cylinder Rebuild Kit — Gas-Gas ES 700 $28.07 Master Cylinder Rebuild Kit — Husaberg 450FCMaster Cylinder Rebuild Kit — Husaberg 450FC $28.31 Master Cylinder Rebuild Kit — KTM Adventure 640Master Cylinder Rebuild Kit — KTM Adventure 640 $28.31 Brake Caliper Rebuild Kit — Husaberg 450FCBrake Caliper Rebuild Kit — Husaberg 450FC $30.99 Brake Caliper Rebuild Kit — KTM EXC 125Brake Caliper Rebuild Kit — KTM EXC 125 $31.23 Brake Caliper Bolt Kit — Can-Am Outlander 1000Brake Caliper Bolt Kit — Can-Am Outlander 1000 $11.56 Brake Caliper Bolt Kit — Ducati DESMO 450 MXBrake Caliper Bolt Kit — Ducati DESMO 450 MX $15.49 Brake Caliper Rebuild Kit — KTM Adventure 390Brake Caliper Rebuild Kit — KTM Adventure 390 $31.23 Brake Caliper Piston Kit — Husaberg 450FCBrake Caliper Piston Kit — Husaberg 450FC $43.94 Brake Caliper Piston Kit — KTM EXC 125Brake Caliper Piston Kit — KTM EXC 125 $24.35 Brake Caliper Rebuild Kit — Husaberg 450FCBrake Caliper Rebuild Kit — Husaberg 450FC $30.99 JT Sprockets Rotor — 220mm — Husqvarna/KTM Rear (JTD6025SC01)JT Sprockets Rotor — 220mm — Husqvarna/KTM Rear (JTD6025SC01) $38.99 JT Sprockets Rotor — 260mm — Husqvarna/KTM Front (JTD6026SC01)JT Sprockets Rotor — 260mm — Husqvarna/KTM Front (JTD6026SC01) $38.99

Drivetrain for the KTM 125 SX

Upgraded Wheel Bearing Kit — Husaberg 390FEUpgraded Wheel Bearing Kit — Husaberg 390FE $83.25 Wheel Bearing Kit — Gas-Gas MC85 1714Wheel Bearing Kit — Gas-Gas MC85 1714 $27.43 EBC Clutch Friction Plate Kit — CKF5611EBC Clutch Friction Plate Kit — CKF5611 $129.78 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 — Honda CRF250L (2017-2020) +Wheel Bearing Kit — Honda CRF250L (2017-2020) + $21.01 Wheel Bearing Kit — Ducati DESMO 450 MX (2026) +Wheel Bearing Kit — Ducati DESMO 450 MX (2026) + $32.65 Wheel Bearing Kit — BMW HP4 (2013-2014) + 302Wheel Bearing Kit — BMW HP4 (2013-2014) + 302 $28.74 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 Bushing Kit — KTM EXC 125 (2000-2001) + 29Fork Bushing Kit — KTM EXC 125 (2000-2001) + 29 $63.54 Fork Oil Seal Kit — BMW F800GS (2013-2017) + 101Fork Oil Seal Kit — BMW F800GS (2013-2017) + 101 $19.12 Fork Oil Seal Kit — KTM Adventure 640Fork Oil Seal Kit — KTM Adventure 640 $19.12 Fork Oil Seal Kit — Beta RR 4T 250 (2005-2007) +Fork Oil Seal Kit — Beta RR 4T 250 (2005-2007) + $19.12 Fork Dust Seal Kit — KTM Adventure 640Fork Dust Seal Kit — KTM Adventure 640 $20.62 Fork Dust Seal Kit — BMW F800GS (2013-2017) +Fork Dust Seal Kit — BMW F800GS (2013-2017) + $21.01 Fork Dust Seal Kit — Beta RR 4T 250 (2005-2007)Fork Dust Seal Kit — Beta RR 4T 250 (2005-2007) $21.01 Swingarm Bearing Kit — KTM EGS 125 (1998-1999) +Swingarm Bearing Kit — KTM EGS 125 (1998-1999) + $105.80 Fork Oil & Dust Seal Kit — Gas-Gas EC125 (2003)Fork Oil & Dust Seal Kit — Gas-Gas EC125 (2003) $39.78 Fork Oil & Dust Seal Kit — KTM Adventure 640Fork Oil & Dust Seal Kit — KTM Adventure 640 $39.78 Fork Oil & Dust Seal Kit — Gas-Gas EC125 — 10 Makes — (PN 56-149)Fork Oil & Dust Seal Kit — Gas-Gas EC125 — 10 Makes — (PN 56-149) $39.78

Controls for the KTM 125 SX

Clutch Master Cylinder Rebuild Kit — KTMClutch Master Cylinder Rebuild Kit — KTM $49.80 Clutch Slave Cylinder Rebuild Kit — Husqvarna TCClutch Slave Cylinder Rebuild Kit — Husqvarna TC $44.89 Clutch Slave Cylinder Rebuild Kit — KTM EXC 200Clutch Slave Cylinder Rebuild Kit — KTM EXC 200 $44.89 Steering Stem Bearing Kit — Beta RR 2T 125Steering Stem Bearing Kit — Beta RR 2T 125 $44.60

Exhaust for the KTM 125 SX

FMF Fatty Pipe — KTM 125 SX (2000-2003), KTM 125SX (2000-2003), 2-StrokeFMF Fatty Pipe — KTM 125 SX (2000-2003), KTM 125SX (2000-2003), 2-Stroke $269.99 FMF Powercore 2 — KTM 125 SX (1998-2003), KTM 125SX (1998-2003), 2-StrokeFMF Powercore 2 — KTM 125 SX (1998-2003), KTM 125SX (1998-2003), 2-Stroke $179.99

Protection for the KTM 125 SX

All Balls Racing Chain Roller — KTMAll Balls Racing Chain Roller — KTM $23.16

Maintenance for the KTM 125 SX

Twin Air Standard Air Filter — KTM 125 EXC (1998-2003), KTM 125 SX (1998-2003)Twin Air Standard Air Filter — KTM 125 EXC (1998-2003), KTM 125 SX (1998-2003) $29.08 Twin Air Standard Air Filter — KTM 125 EXC (1998-2003), KTM 125 SX (1998-2003)Twin Air Standard Air Filter — KTM 125 EXC (1998-2003), KTM 125 SX (1998-2003) $36.99 Twin Air Standard Air Filter — KTM 105 SX (2006-2011), KTM 125 EXC (1997-2006)Twin Air Standard Air Filter — KTM 105 SX (2006-2011), KTM 125 EXC (1997-2006) $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.