Suspension Parts for 2004 YAMAHA YZ125 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 2004 YAMAHA YZ125. 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 2004 YAMAHA YZ125.

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

0.4

Stock Shock Spring Rate

4.6

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 125 cc

FORKS INFO

Fork Manufacturer

Fork Type: KYB USD 48 mm OD

Fork Dimensions

Compression Nut Torque: 48 in-lb (0.56 kgf-m)
Fork Travel: 300 mm

Fork Features

Twin Chamber Fork: No

Fork Oil

Fork Oil Weight: SAE 2.5
Fork Oil Level: 125 mm

Fork Spring Information

Standard Preload: 8 mm

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: 16 mm
Standard Sag: 103 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 2.5 Weight
Standard Preload: 8

Shock Features

Non-rebuildable: No

Fitment-Matched Suspension Parts by Category

FORK UPGRADE PARTS

4 Parts

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FORK SPRINGS
Ideal Fork Rate for kg: kg/mm ( N/mm)

4 Parts

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FORK CARTRIDGE ASSEMBLY PARTS

3 Parts

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FORK SEALS & BUSHES

15 Parts

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FORK COMPRESSION ADJUSTER ASSY

16 Parts

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FORK CARTRIDGE ROD PARTS

8 Parts

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FORK UPPER & LOWER TUBE PARTS

3 Parts

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FORK O-RINGS

12 Parts

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SHOCK REBUILD KITS

2 Parts

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SHOCK UPGRADE PARTS

6 Parts

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SHOCK SPRINGS
Ideal Spring Rate for kg: kg/mm ( N/mm)

3 Parts

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SHOCK SPRING RETAINERS /BUMPERS

7 Parts

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SHOCK BLADDER PARTS

7 Parts

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SHOCK SEAL CASE PARTS

13 Parts

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SHOCK SHAFT PARTS

17 Parts

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SHOCK BODY PARTS

17 Parts

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SHOCK PISTON PARTS

8 Parts

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SHOCK COMP ADJUSTER PARTS

4 Parts

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SUSPENSION LOCKNUTS & BUSHES

23 Parts

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TOOLS & LUBRICANTS

37 Parts

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All Fitment-Matched Suspension Parts

Browse All 157 Products for YAMAHA YZ125 2004

Kayaba (KYB) Genuine Motorcycle Parts

Top cap o-ring

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110070000301)

$4.86
14 In Stock

Front Fork Bleed Bolt Complete Aluminium

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork Bleed Bolt Complete Aluminium

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110090000501)

$8.71
30 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
27 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: 110231200101)

$10.97
29 In Stock

Fork Compression Valve Bare Base Tower - YZ 2004

Kayaba (KYB) Genuine Motorcycle Parts

Fork Compression Valve Bare Base Tower - YZ 2004

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110490001801)

$187.10
1 In Stock

Valve stopper ff 8mm

Kayaba (KYB) Genuine Motorcycle Parts

Valve stopper ff 8mm

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110510000101)

$5.24
58 In Stock

Slide collar ff 8*11.2*6.0

Kayaba (KYB) Genuine Motorcycle Parts

Slide collar ff 811.26.0

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110530000601)

$4.37
7 In Stock

Non return spring ff 8mm YZ450F/WR250F/WR450F 2005

Kayaba (KYB) Genuine Motorcycle Parts

Non return spring ff 8mm YZ450F/WR250F/WR450F 2005

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110550000201)

$3.69
7 In Stock

Kayaba (KYB) Genuine Parts Suspension Damping Non-Return Valve Spring - 8mm - YZ 04

Kayaba (KYB) Genuine Motorcycle Parts

Kayaba (KYB) Genuine Parts Suspension Damping Non-Return Valve Spring - 8mm - YZ 04

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110550000601)

$3.89
28 In Stock

Shims STD 11.2*25-0.4 non return valve

Kayaba (KYB) Genuine Motorcycle Parts

Shims STD 11.2*25-0.4 non return valve

Original KYB Suspension Valving Shim
(SKU: 110570000501)

$4.74
4 In Stock

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