Suspension Parts for 2021 YAMAHA YZ125X Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 2021 YAMAHA YZ125X. 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 YAMAHA YZ125X.

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 Shock Spring Rate

4.6

Bike Type

OFFROAD

Ideal Rider Weight

75 kg

FORKS INFO

Fork Manufacturer

Fork Type: KYB USD 48 mm OD

Fork Dimensions

Fork Travel: 300 mm

Fork Features

Twin Chamber Fork: Yes

Fork Oil

Fork Oil Weight: SAE 2.5
Oil Quanity: 350cc

SHOCKS INFO

Shock Manufacturer

Shock Type: KYB 46 mm ID

Shock Dimensions

Nitrogen Pressure: 142 psi
Shock Length (Eye to Eye): 494 mm
Shock Shaft Outer Diameter: 18 mm
Standard Sag: 103 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 2.5 Weight
Standard Preload: 24
Wheel Travel: 315 mm

Shock Features

Non-rebuildable: No

Fitment-Matched Suspension Parts by Category

FORK UPGRADE PARTS

8 Parts

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FORK CARTRIDGE ASSEMBLY PARTS

6 Parts

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FORK SEALS & BUSHES

6 Parts

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SHOCK BODY PARTS

6 Parts

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TOOLS & LUBRICANTS

26 Parts

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All Fitment-Matched Suspension Parts

Browse All 68 Products for YAMAHA YZ125X 2021

Teknik Schrader Valve Cap

Teknik Motorsport

Teknik Schrader Valve Cap

(SKU: 30-652-00)

$3.99
603 In Stock

Xtrig Triple Clamps Rocs Tech YZ125 15-24

XTRIG

Xtrig Triple Clamps Rocs Tech YZ125 15-24

(SKU: 40201022)

Colour: Lilac (Purple)

Offset (mm): 25

$845.00
1 In Stock

Teknik Fork Re-Valve Kit – KYB 48 mm AOSS Twin-Chamber

Teknik Motorsport

Teknik Fork Re-Valve Kit – KYB 48 mm AOSS Twin-Chamber

Multi-spec compression valve kit with selectable C-spec
(SKU: 25-033-00)

$295.00
10 In Stock

48mm KYB Fork Seal Set 2pc set , Hi performance seal

Capelli Race

48mm KYB Fork Seal Set 2pc set , Hi performance seal

one pair of oil seals only, for one bike
(SKU: KYB48sealset)

Oil Seal Inside Diameter d (mm): 48.0

Oil Seal Outside Ø D1 (mm): 58.7

Oil Seal Height H (mm): 4.9

$49.95
233 In Stock

KYB Factory Spring collar complete 28mm Factory Aluminium

Kayaba (KYB) Genuine Motorcycle Parts

KYB Factory Spring collar complete 28mm Factory Aluminium

Genuine KYB Factory Race Parts
(SKU: 160190000101)

$102.85
Coming Soon

Oil seal insert 48mm

Kayaba (KYB) Genuine Motorcycle Parts

Oil seal insert 48mm

Original KYB Motorcycle Suspension Tool
(SKU: 000.0653)

$122.69
Special Order

Piston rod clamp 10mm / 12.5mm

Kayaba (KYB) Genuine Motorcycle Parts

Piston rod clamp 10mm / 12.5mm

Original KYB Motorcycle Suspension Tool
(SKU: 000.0655)

$96.80
Special Order

DRC ENZO | Fork Base Valve Wrench Jig | KYB AOS | Black

Enzo Racing

DRC ENZO | Fork Base Valve Wrench Jig | KYB AOS | Black

Developed by Enzo Racing
(SKU: ED59-37-201)

$59.99
Nil Stock

DRC ENZO | Fork Outer Clamp/Holder | Quick Release

Enzo Racing

DRC ENZO | Fork Outer Clamp/Holder | Quick Release

Developed by Enzo Racing
(SKU: ED59-37-260)

$185.00
Nil Stock

Fork Cartridge Seal Socket - 17mm - **use 000.0679**

Kayaba (KYB) Genuine Motorcycle Parts

Fork Cartridge Seal Socket - 17mm - use 000.0679

Original KYB Motorcycle Suspension Tool
(SKU: 150150000101)

$77.00
Special Order

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