Suspension Parts for 1991 YAMAHA YZ250 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 1991 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 1991 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

0.381

Stock Shock Spring Rate

5

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 250 cc

FORKS INFO

Fork Manufacturer

Fork Type: KYB USD 43 mm OD

Fork Dimensions

Compression Nut Torque: 25 in-lb (0.29 kgf-m)

Fork Features

Twin Chamber Fork: No

Fork Oil

Fork Oil Weight: SAE 2.5
Fork Oil Level: 125 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 Length (Eye to Eye): 469 mm
Shock Travel: 128 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: 13

Shock Features

Non-rebuildable: No

Fitment-Matched Suspension Parts by Category

FORK SEALS & BUSHES

10 Parts

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SHOCK SEAL CASE PARTS

11 Parts

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SHOCK SHAFT PARTS

9 Parts

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SHOCK BODY PARTS

7 Parts

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SUSPENSION LOCKNUTS & BUSHES

8 Parts

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TOOLS & LUBRICANTS

26 Parts

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All Fitment-Matched Suspension Parts

Browse All 78 Products for YAMAHA YZ250 1991

SKF 43mm KYB Fork Seal and Wiper Set

SKF Sealing

SKF 43mm KYB Fork Seal and Wiper Set

Requires 2 kits for complete fork service.
(SKU: SKF43K)

From $59.95

Colour: Green

$59.95
30 In Stock

Colour: Black

$59.95
25 In Stock

Fork Tubes NOK Oil Seals Pair - YZFR1 2002-2003 ZX-10 2004-2005

Kayaba (KYB) Genuine Motorcycle Parts

Fork Tubes NOK Oil Seals Pair - YZFR1 2002-2003 ZX-10 2004-2005

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110014300302)

Inside Diameter d (mm): 43.0

Height H (mm): 9.5

Outside Ø D (mm): 55.0

$49.60
Special Order

Fork Tubes NOK Oil Seals Pair - YZFR1 2004-2005 & 2016+ & Tenere 700

Kayaba (KYB) Genuine Motorcycle Parts

Fork Tubes NOK Oil Seals Pair - YZFR1 2004-2005 & 2016+ & Tenere 700

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110014300402)

$38.50
Special Order

Nut for spring rcu 46mm bottom Steel

Kayaba (KYB) Genuine Motorcycle Parts

Nut for spring rcu 46mm bottom Steel

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120174600101)

$64.19
Coming Soon

Valve stopper rcu YZ125

Kayaba (KYB) Genuine Motorcycle Parts

Valve stopper rcu YZ125

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120190000301)

$17.20
Coming Soon

Rear Shock Oil Seal KYB 16mm Big

Kayaba (KYB) Genuine Motorcycle Parts

Rear Shock Oil Seal KYB 16mm Big

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 120271600101)

Oil Seal Inside Diameter d (mm): 16.0

$36.89
Special Order

Rear Shock Dust seal KYB 16mm x 31

Kayaba (KYB) Genuine Motorcycle Parts

Rear Shock Dust seal KYB 16mm x 31

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 120301600101)

$15.46
Coming Soon

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

Front Fork KYB Oil 01M 1L *Discontinued*

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork KYB Oil 01M 1L Discontinued

Original KYB Suspension Lubricants
(SKU: 130010010101)

Pack Size: 1 L Pack

$48.96
Special Order

Front Fork KYB Oil 01M 5L *Discontinued*

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork KYB Oil 01M 5L Discontinued

Original KYB Suspension Lubricants
(SKU: 130010050101)

Pack Size: 5 L Bottle

$226.19
Special Order

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