Suspension Parts for 2025 YAMAHA YZ125 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 2025 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 2025 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

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: Yes

Fork Oil

Fork Oil Weight: SAE 2.5
Oil Quanity: 350cc

Fork Spring Information

Standard Preload: 8 mm

Fork Comments

: Check floating piston for cracking

SHOCKS INFO

Shock Manufacturer

Shock Type: KYB 46 mm ID

Shock Dimensions

Nitrogen Pressure: 142 psi
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

17 Parts

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FORK SEALS & BUSHES

18 Parts

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SHOCK UPGRADE PARTS

12 Parts

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SUSPENSION LOCKNUTS & BUSHES

12 Parts

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TOOLS & LUBRICANTS

43 Parts

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All Fitment-Matched Suspension Parts

Browse All 159 Products for YAMAHA YZ125 2025

Krooztune KYB HIGH SPEED COMP PISTON

Krooztune

Krooztune KYB HIGH SPEED COMP PISTON

Proudly made in Australia
(SKU: KT-KYBHSCP)

$62.95
3 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
4 In Stock

Krooztune 2022-on YZ 125/250 2-Stroke Rear Lowering Link - 20mm

Krooztune

Krooztune 2022-on YZ 125/250 2-Stroke Rear Lowering Link - 20mm

Proudly made in Australia
(SKU: KT-YAMLLA-2S)

$264.95
1 In Stock

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

Capelli Race

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

One oil seal and one dust seal, buy 2 sets for one bike
(SKU: KYB48Capset)

Oil Seal Inside Diameter d (mm): 48.0

Oil Seal Outside Ø D1 (mm): 58.7

Oil Seal Height H (mm): 4.9

Dust Wiper Inside Diameter d (mm): 48.0

Dust Wiper Outside Ø D1 (mm): 58.2

Dust Wiper Height H (mm): 9.5

$49.95
155 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
157 In Stock

K-Tech Shock Absorber Piston Bush 46.00x11.50x1.20mm -KYB

K-Tech

K-Tech Shock Absorber Piston Bush 46.00x11.50x1.20mm -KYB

(SKU: PB-46115120)

Height H (mm): 11.50

Outside Ø D (mm): 46.0

Wall Thickness (mm): 1.20

$36.95
6 In Stock

SKF KYB Shock Seal Case Assembly 46 x 18 x 20

SKF Sealing

SKF KYB Shock Seal Case Assembly 46 x 18 x 20

46mm od x 18mm id x 20mm tall - KYB
(SKU: SH2-KYB1846)

Shock Bore Ø D (mm): 46.0

Shock Shaft Ø D (mm): 18.0

Height H (mm): 20.0

$79.95
9 In Stock

SKF KYB Fork Seal Kit 48mm (Dual Comp)

SKF Sealing

SKF KYB Fork Seal Kit 48mm (Dual Comp)

Requires 2 kits for complete fork service.
(SKU: SKF-DUAL-48K)

Colour: Green/Orange

Seal Outer Ø D (mm): 58.42

Seal Height H (mm): 8.5

Seal Wiper Outside Ø D1 (mm): 58.70

Seal Wiper Height H1 (mm): 4.9

Fork Inner Tube Ø d (mm): 48.0

$69.95
24 In Stock

SKF Fork Bushings Kit 2pcs - 1x Inner 1x Outer - KYB 48

SKF Sealing

SKF Fork Bushings Kit 2pcs - 1x Inner 1x Outer - KYB 48

Genuine SKF Fork Bush Kit
(SKU: SKF-VKWA-KYB48-A)

Fork Inner Tube Ø d (mm): 48.0

External Teflon Bushing Dimensions (mm): 47X49X20

Internal Teflon Bushing Dimensions (mm): 48X52X15

Suspension Brand: Kayaba (KYB)

$44.95
20 In Stock

SKF 48mm KYB Fork Seal and Wiper Set

SKF Sealing

SKF 48mm KYB Fork Seal and Wiper Set

Requires 2 kits for complete fork service.
(SKU: SKF48K)

Colour: Green

Seal Outer Ø D (mm): 58.42

Seal Height H (mm): 8.5

Seal Wiper Outside Ø D1 (mm): 58.70

Seal Wiper Height H1 (mm): 4.9

Fork Inner Tube Ø d (mm): 48.0

$59.95
48 In Stock

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