Suspension Parts for 1999 YAMAHA YZ125 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 1999 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 1999 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

0.42

Stock Shock Spring Rate

4.6

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 125 cc

FORKS INFO

Fork Manufacturer

Fork Type: KYB USD 46 mm OD

Fork Dimensions

Compression Nut Torque: 48 in-lb (0.56 kgf-m)
Fork Travel: 285 mm

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: 0.41
Standard Preload: 8 mm

SHOCKS INFO

Shock Manufacturer

Shock Type: KYB 46 mm ID

Shock Dimensions

Nitrogen Pressure: 142 psi
Shock Length (Eye to Eye): 479 mm
Shock Travel: 140 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: 8

Shock Features

Non-rebuildable: No

Fitment-Matched Suspension Parts by Category

FORK COMPRESSION ADJUSTER ASSY

15 Parts

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SHOCK SEAL CASE PARTS

13 Parts

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SHOCK SHAFT PARTS

10 Parts

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SUSPENSION LOCKNUTS & BUSHES

17 Parts

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TOOLS & LUBRICANTS

30 Parts

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All Fitment-Matched Suspension Parts

Browse All 115 Products for YAMAHA YZ125 1999

Kayaba (KYB) Genuine Motorcycle Parts

Top cap o-ring

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110070000301)

$4.86
14 In Stock

Valve cap std steel

Kayaba (KYB) Genuine Motorcycle Parts

Valve cap std steel

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120140000101)

$6.97
28 In Stock

Valve stopper ff 8mm

Kayaba (KYB) Genuine Motorcycle Parts

Valve stopper ff 8mm

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110510000101)

$5.24
58 In Stock

Washer ff next to oil seal 46mm

Kayaba (KYB) Genuine Motorcycle Parts

Washer ff next to oil seal 46mm

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110770000301)

$14.21
14 In Stock

Washer seal head rcu small 16mm

Kayaba (KYB) Genuine Motorcycle Parts

Washer seal head rcu small 16mm

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120280000101)

$4.74
36 In Stock

Yamalink Lowering Link 1999-2001 YZ 125/250 -40mm

Yamalink

Yamalink Lowering Link 1999-2001 YZ 125/250 -40mm

Yamaha 1999-2001 YZ 125/250
(SKU: 30-006-39)

Seat Height Change (mm): -40

$259.00
3 In Stock

Yamalink Lowering Link YZ 400F 426F 1999-2001 -35mm 5ET-2217A-00-00

Yamalink

Yamalink Lowering Link YZ 400F 426F 1999-2001 -35mm 5ET-2217A-00-00

Yamaha 1999-2001 YZ 250F/400F/426F
(SKU: 30-006-28)

Seat Height Change (mm): -35

$315.00
1 In Stock

Eibach EMS Moto Front Fork Spring Kit. 41.2 x 462 KYB 46mm USD YZ WR 125 250 400 426 1996-2004

Eibach Suspension Technology

Eibach EMS Moto Front Fork Spring Kit. 41.2 x 462 KYB 46mm USD YZ WR 125 250 400 426 1996-2004

Made in the USA (QS9000) or Germany (ISO16949)
(SKU: 981)

From $249.94

Spring Rate: 0.38 kg/mm

$249.94
Special Order

Shipped 2-3 Days. Stock at Eibach Australia.

Shipped 2-3 Days. Stock at Eibach Australia.

Spring Rate: 0.40 kg/mm

$249.94
1 In Stock

Spring Rate: 0.42 kg/mm

$249.94
1 In Stock

Spring Rate: 0.44 kg/mm

$249.94
1 In Stock

Spring Rate: 0.46 kg/mm

$249.94
1 In Stock

Spring Rate: 0.48 kg/mm

$249.94
3 In Stock

Spring Rate: 0.45 kg/mm

$249.94
1 In Stock

Teflon Shaft Bushing - 16 x 18 x 15

Teknik Motorsport

Teflon Shaft Bushing - 16 x 18 x 15

16mm id x 18mm od x 15mm Length
(SKU: 22-078-00)

$2.75
363 In Stock

Rear Shock O-Ring Piston KYB 46mm

Kayaba (KYB) Genuine Motorcycle Parts

Rear Shock O-Ring Piston KYB 46mm

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 120224600101)

$4.86
Special Order

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