Suspension Parts for 1990 YAMAHA YZ250 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 1990 YAMAHA YZ250. 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 1990 YAMAHA YZ250.

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

0.379

Stock Shock Spring Rate

5.2

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 250 cc

FORKS INFO

Fork Manufacturer

Fork Type: KYB USD 41 mm OD

Fork Dimensions

Compression Nut Torque: 48 in-lb (0.56 kgf-m)

Fork Features

Twin Chamber Fork: No

Fork Oil

Fork Oil Weight: SAE 2.5
Fork Oil Level: 120 mm

Fork Spring Information

Spring Rate – Claimed: 0.39
Standard Preload: 10 mm

SHOCKS INFO

Shock Manufacturer

Shock Type: KYB 44 mm ID

Shock Dimensions

Nitrogen Pressure: 142 psi
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: 14

Shock Features

Non-rebuildable: No

Fitment-Matched Suspension Parts by Category

FORK SEALS & BUSHES

7 Parts

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SUSPENSION LOCKNUTS & BUSHES

4 Parts

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TOOLS & LUBRICANTS

21 Parts

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All Fitment-Matched Suspension Parts

Browse All 46 Products for YAMAHA YZ250 1990

Fork Seal Driver - 41mm

Techtool

Fork Seal Driver - 41mm

See Part # 93-009-00 for complete set
(SKU: 93-009-10)

$76.95
12 In Stock

16 x 12mm Shock Seal Head Bullet

Teknik Tools

16 x 12mm Shock Seal Head Bullet

Motorcycle Suspension Tools
(SKU: 93-025-00)

$19.95
50 In Stock

Shock Seal Head Steel Bullet 4pc Kit

Techtool

Shock Seal Head Steel Bullet 4pc Kit

14x12 | 16x12 | 18x12 | 18x16 mm
(SKU: 93-031-01)

$69.95
59 In Stock

Techtool Fork Tube Tool & Cartridge Rod Holding Plate

Techtool

Techtool Fork Tube Tool & Cartridge Rod Holding Plate

For KYB, Showa & WP Twin or Open Chamber Forks
(SKU: 93-032-00)

$220.00
10 In Stock

Shock Bushing Driver Set

Techtool

Shock Bushing Driver Set

(SKU: 93-118-00)

$33.00
11 In Stock

DRC Fork Seal Driver Set | Universal | 40-50mm

DRC Zeta Hardware

DRC Fork Seal Driver Set | Universal | 40-50mm

DRC Fork Seal Driver Tool Set
(SKU: D59-26-005)

$177.09
29 In Stock

DRC SHOCK SEAL HEAD INSERT KIT | KYB/SHOWA | INNER 12mm / OUTER 14/16/18mm

DRC Zeta Hardware

DRC SHOCK SEAL HEAD INSERT KIT | KYB/SHOWA | INNER 12mm / OUTER 14/16/18mm

Shock seal Bullet set -14x12 16x12 18x12
(SKU: D59-37-135)

$49.50
7 In Stock

SKF 41mm KYB Fork Seal and Wiper Set

SKF Sealing

SKF 41mm KYB Fork Seal and Wiper Set

Requires 2 kits for complete fork service.
(SKU: SKF41K)

From $59.95

Colour: Green

$59.95
8 In Stock

Colour: Black

$59.95
26 In Stock

Fork Tube Slide Bushing Pair - 41mm Forks

Kayaba (KYB) Genuine Motorcycle Parts

Fork Tube Slide Bushing Pair - 41mm Forks

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110044100902)

Inside Diameter d (mm): 41.0

Fork Inner Tube Ø d (mm): 41.0

Height H (mm): 12.0

Outside Ø D (mm): 46.0

Wall Thickness (mm): 2.5

$41.58
Special Order

Rear Shock Service Kit KYB 44/16mm Oil Seal Large

Kayaba (KYB) Genuine Motorcycle Parts

Rear Shock Service Kit KYB 44/16mm Oil Seal Large

Genuine OEM Kayaba Motorcycle Suspension Parts
(SKU: 129996000801)

$57.76
Special Order

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