Discover suspension parts guaranteed to fit the 2021 KTM 125 EXC. Every product in this category has been validated against year-specific fork and shock specifications to ensure true compatibility.
You’ll find fork components, shock parts, shims, upgrade kits, complete suspension systems, chassis components, and the tools and fluids required for accurate servicing - all aligned with the suspension setup of the 2021 KTM 125 EXC.

Use this page as a reliable reference when maintaining, rebuilding, or upgrading your bike’s suspension.

Bike-Specific Suspension Specifications & Setup Information

CALCULATE SPRING RATES

This is a recommendation only please consult your manual

Ideal Fork Rate:

kg/mm ( N/mm)

Ideal Shock Rate:

kg/mm ( N/mm)

BIKE DETAILS

Stock Fork Spring Rate

0.39

Stock Shock Spring Rate

66N

Bike Type

OFFROAD

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 200 cc

FORKS INFO

Fork Manufacturer

Fork Type: WP USD 48 mm OD

Fork Dimensions

Compression Nut Torque: 25 in-lb (0.29 kgf-m)

Fork Features

Twin Chamber Fork: No

Fork Oil

Fork Oil Weight: SAE 5
Fork Oil Level: 110 mm
Oil Quanity: Range +10 mm to -20mm

Fork Spring Information

Spring Rate – Claimed: 4.0N
Standard Preload: 8 mm

Fork Comments

: Set preload with the adjuster at minimum. (Hex on cap is preload) See oil level instructions.

SHOCKS INFO

Shock Manufacturer

Shock Type: WP 50 mm ID

Shock Dimensions

Nitrogen Pressure: 150 psi
Shock Shaft Outer Diameter: 18 mm
Standard Sag: 113-118 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 5 Weight
Standard Preload: 7-8mm

Shock Features

Non-rebuildable: No

Shock Spring Information

Spring Rate - Claimed: 66N kg/mm

Shock Comments

: New shock angle and length for 2012

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All Fitment-Matched Suspension Parts

Browse All 77 Products for KTM 125 EXC 2021

WP Regas Valve (M5x0.8 Schrader)

Suits WP Shocks
(SKU: 22-600-09)

$30.80
94 In Stock

18 x 16mm Shock Seal Head Bullet. Suits Pds Shock With Long Shaft.

Motorcycle Suspension Tools
(SKU: 93-027-00)

$19.95
49 In Stock

24mm WP Pds Shock Shaft Jam Nut Tool

Motorcycle Suspension Tools
(SKU: 93-030-00)

$66.00
28 In Stock

48mm WP SKF Mud Scraper

Removable Scraper
(SKU: KIT-MS48WP)

$66.00
4 In Stock

All Balls Rear Shock Seal Kit - KTM PDS (1999-2016)

18 ID 50 OD
(SKU: 37-1119)

Shock Bore Ø D (mm): 50.0

Shock Shaft Ø D (mm): 18.0

Height H (mm): 22.0

$95.00
2 In Stock

DRC ENZO | Fork Cap Spinner | WP

(SKU: ED59-37-320)

$43.00
9 In Stock

DRC FORK CAP WRENCH PRO | WP | 50mm ORANGE

Developed by Enzo Racing
(SKU: D59-37-172)

$45.00
31 In Stock

DRC Fork Seal Driver Set | Universal | 40-50mm

DRC Fork Seal Driver Tool Set
(SKU: D59-26-005)

$177.09
29 In Stock

Fork Bleeder Tool Set

Motorcycle Suspension Tools
(SKU: 93-007-00)

$110.00
25 In Stock

Fork Seal Driver - 48mm

See Part # 93-009-00 for complete set
(SKU: 93-009-50)

$87.95
8 In Stock

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Suspension Parts for KTM 125 EXC 2021 – Shocks, Forks & Upgrades