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 UPGRADE PARTS

5 Parts

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SHOCK BLADDER PARTS

5 Parts

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SHOCK SHAFT PARTS

5 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

Enzo Racing KYB AOS 48mm Front Fork Cap Compression Adjuster Assembly

Enzo Racing

Enzo Racing KYB AOS 48mm Front Fork Cap Compression Adjuster Assembly

(SKU: ERFFCA)

From $440.00

Colour: Black-Blue

$440.00
Nil Stock

Notify Me

Colour: Grey-Orange

$440.00
Nil Stock

Colour: Grey-Black

$440.00
Nil Stock

Colour: Red-Black

$440.00
4 In Stock

Colour: Blue-Grey

$440.00
3 In Stock

Colour: Blue-Orange

$440.00
1 In Stock

Colour: Blue-Gold

$440.00
7 In Stock

Colour: Grey-Blue

$440.00
4 In Stock

Colour: Red-Grey

$440.00
Special Order

Fork Cartridge Cylinder Collar 28mm Spring Stopper. suits 24mm KYB and Showa

Teknik Motorsport

Fork Cartridge Cylinder Collar 28mm Spring Stopper. suits 24mm KYB and Showa

(SKU: 24-384-00)

$18.00
38 In Stock

Free piston ff circlip near bushing

Kayaba (KYB) Genuine Motorcycle Parts

Free piston ff circlip near bushing

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110290000201)

$3.74
256 In Stock

Front Fork Bleed Bolt o-ring

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork Bleed Bolt o-ring

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110100000101)

$2.24
25 In Stock

Front Fork Bush Cylinder Head 12.5mm

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork Bush Cylinder Head 12.5mm

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110231000301)

$10.97
19 In Stock

InnTeck Outer Guide Fork Bush KAYABA 48mm **can use KYB 110044800202**

Innteck

InnTeck Outer Guide Fork Bush KAYABA 48mm can use KYB 110044800202

KAYABA 48mm 48x52x15
(SKU: SKTI48K)

Inside Diameter d (mm): 48.0

Fork Inner Tube Ø d (mm): 48.0

Height H (mm): 15.0

Outside Ø D (mm): 52.0

Wall Thickness (mm): 2.0

$22.00
26 In Stock

Krooztune KYB 29mm SSS Fork Cartridge Mid-Post Float Tuning Kit

Krooztune

Krooztune KYB 29mm SSS Fork Cartridge Mid-Post Float Tuning Kit

Proudly made in Australia
(SKU: KT-KYBMPKF)

$159.95
8 In Stock

KYB Factory Innertube KIT DLC 600mm x 45mm x 48mm YZ/ Beta

Kayaba (KYB) Genuine Motorcycle Parts

KYB Factory Innertube KIT DLC 600mm x 45mm x 48mm YZ/ Beta

Genuine KYB Factory Race Parts
(SKU: 160794810501)

Colour: Black

Fork Inner Tube Length (mm): 600

Outside Ø D (mm): 48.0

$445.18
4 In Stock

KYB Genuine Front Fork Oil 01M - 5 Litres

Kayaba (KYB) Genuine Motorcycle Parts

KYB Genuine Front Fork Oil 01M - 5 Litres

Genuine Kayaba Factory Oil - packaged in Australia
(SKU: 13001005010A)

Pack Size: 5 L Bottle

cSt@40C: 15.6

cSt@100C: 3.5

Viscosity Index: 150

$199.95
55 In Stock

KYB Genuine Rear Shock Oil K2C - 20 Litres

Kayaba (KYB) Genuine Motorcycle Parts

KYB Genuine Rear Shock Oil K2C - 20 Litres

Genuine Kayaba Factory Oil - packaged in Australia
(SKU: 13002020010A)

Pack Size: 20 L Drum

cSt@40C: 11.3

cSt@100C: 4.0

Viscosity Index: 310

$770.00
42 In Stock

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