Suspension Parts for 1991 YAMAHA YZ125 Motorbikes | Guaranteed Fitment

Christmas opening hours. Last shipping day Wednesday 24th December. All orders placed over the break will ship Monday 5th January.

Discover suspension parts guaranteed to fit the 1991 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 1991 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

0.36

Stock Shock Spring Rate

4.7

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 125 cc

FORKS INFO

Fork Manufacturer

: KYB USD 43 mm OD

Fork Dimensions

Compression Nut Torque: 25 in-lb (0.29 kgf-m)
Fork Travel: 295 mm

Fork Features

Twin Chamber Fork: No

Fork Oil

Fork Oil Weight: SAE 5
Fork Oil Level: 80 mm
Oil Quanity: 2 Litres

Fork Spring Information

Standard Preload: 10 mm

SHOCKS INFO

Shock Manufacturer

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

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

24 Parts

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All Fitment-Matched Suspension Parts

Browse All 77 Products for YAMAHA YZ125 1991

Shock Bushing Driver Set

Techtool

Shock Bushing Driver Set

(SKU: 93-118-00)

$33.00
7 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)

$139.99
5 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
4 In Stock

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)

Colour: Green

$59.95
2 In Stock

Colour: Black

$59.95
2 In Stock

InnTeck Inner Slide Fork Bush KAYABA 43mm **can use KYB 110034300102**

Innteck

InnTeck Inner Slide Fork Bush KAYABA 43mm can use KYB 110034300102

KAYABA 43mm 42x44x20
(SKU: SKTE43K)

Inside Diameter d (mm): 42.0

Fork Inner Tube Ø d (mm): 43.0

Height H (mm): 20.0

Outside Ø D (mm): 44.0

Wall Thickness (mm): 1.0

$22.00
5 In Stock

InnTeck Outer Guide Fork Bush KAYABA 43mm **can use KYB 110044300102**

Innteck

InnTeck Outer Guide Fork Bush KAYABA 43mm can use KYB 110044300102

KAYABA 43mm 43x47x12
(SKU: SKTI43K)

Inside Diameter d (mm): 43.0

Fork Inner Tube Ø d (mm): 43.0

Height H (mm): 12.0

Outside Ø D (mm): 47.0

Wall Thickness (mm): 2.0

$22.00
3 In Stock

Fork Tubes NOK Oil Seals Pair - YZFR1 2002-2003 & ZX-10 2004-2005 - **use 110014300502**

Kayaba (KYB) Genuine Motorcycle Parts

Fork Tubes NOK Oil Seals Pair - YZFR1 2002-2003 & ZX-10 2004-2005 - use 110014300502

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 - **use 110014300502**

Kayaba (KYB) Genuine Motorcycle Parts

Fork Tubes NOK Oil Seals Pair - YZFR1 2004-2005 & 2016+ & Tenere 700 - use 110014300502

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

$38.50
Nil Stock

Kayaba (KYB) Genuine Parts Nut for spring rcu 46mm top Steel

Kayaba (KYB) Genuine Motorcycle Parts

Kayaba (KYB) Genuine Parts Nut for spring rcu 46mm top Steel

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120164600101)

$62.00
Coming Soon

Kayaba (KYB) Genuine Parts Rear Shock Seal Head KYB 44/16

Kayaba (KYB) Genuine Motorcycle Parts

Kayaba (KYB) Genuine Parts Rear Shock Seal Head KYB 44/16

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 120244400101)

Shock Bore Ø D (mm): 44.0

Shock Shaft Ø D (mm): 16.0

Height H (mm): 21.5

$142.05
Special Order

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