Suspension Parts for YAMAHA YZ450F 2025 – Shocks, Forks & Upgrades

Discover suspension parts guaranteed to fit the 2025 YAMAHA YZ450F. 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 YZ450F.

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

Rider Weight

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

0.46

Stock Shock Spring Rate

5.81

Bike Type

MX

Ideal Rider Weight

85 kg

Engine Specifications

4 Stroke Engine 449 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
360cc

Fork Spring Information

Spring Rate – Claimed
0.46
Standard Preload
3 mm

Fork Comments

Check floating piston for cracking

SHOCKS INFO

Shock Manufacturer

Shock Type
KYB 50 mm ID

Shock Dimensions

Nitrogen Pressure
142 psi
Shock Shaft Outer Diameter
16 mm
Standard Sag
30 mm
Shaft Nut Torque
25 ft-lbs (34 NM)
Shock Oil
2.5 Weight
Standard Preload
8
Wheel Travel
300 mm

Shock Features

Non-rebuildable
No

Shock Comments

Replace alloy shock collars with steel if binding.

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Browse All 177 Products for YAMAHA YZ450F 2025
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
116 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
56 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):   48 x 15 x 2.0
Internal Teflon Bushing Dimensions (mm):   48 x 20 x 1.0
Suspension Brand:   Kayaba (KYB)
 
$44.95
14 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
58 In Stock
SKF 48mm KYB Fork Seal and Wiper Set - Heavy Duty
SKF Sealing

SKF 48mm KYB Fork Seal and Wiper Set - Heavy Duty

Requires 2 kits for complete fork service.
(SKU: SKF48KHD)
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
 
$62.94
24 In Stock