Suspension Parts for 1985 YAMAHA YZ125 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 1985 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 1985 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

0.301

Stock Shock Spring Rate

4.5

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 125 cc

FORKS INFO

Fork Manufacturer

Fork Type: KYB Conventional 43 mm OD

Fork Dimensions

Fork Travel: 295 mm

Fork Features

Twin Chamber Fork: No

Fork Oil

Fork Oil Weight: SAE 7.5
Fork Oil Level: 130 mm

Fork Spring Information

Standard Preload: 10 mm

SHOCKS INFO

Shock Manufacturer

Shock Type: Soqi 40 mm ID

Shock Dimensions

Nitrogen Pressure: 175 psi
Shock Length (Eye to Eye): 439 mm
Shock Travel: 109 mm
Shock Shaft Outer Diameter: 12.5 mm
Standard Sag: 103 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 5 Weight

Fitment-Matched Suspension Parts by Category

FORK SPRINGS
Ideal Fork Rate for kg: kg/mm ( N/mm)

2 Parts

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FORK SEALS & BUSHES

5 Parts

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TOOLS & LUBRICANTS

11 Parts

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All Fitment-Matched Suspension Parts

Browse All 19 Products for YAMAHA YZ125 1985

Seal hammer 43mm

Kayaba (KYB) Genuine Motorcycle Parts

Seal hammer 43mm

Original KYB Motorcycle Suspension Tool
(SKU: 000.0652)

$144.96
1 In Stock

Shock Bushing Driver Set

Techtool

Shock Bushing Driver Set

(SKU: 93-118-00)

$33.00
11 In Stock

Techtool Motorcycle Fork Seal Driver Kit 9pc Kit

Techtool

Techtool Motorcycle Fork Seal Driver Kit 9pc Kit

35/36-39-41-43-45-46/47-48-49/50-54mm
(SKU: 93-009-00)

$470.58
18 In Stock

Eibach EMS Moto Front Fork Spring Kit. 36.7 x 510 1996-2004 Honda XR400 Suzuki DR250 350 650

Eibach Suspension Technology

Eibach EMS Moto Front Fork Spring Kit. 36.7 x 510 1996-2004 Honda XR400 Suzuki DR250 350 650

Made in the USA (QS9000) or Germany (ISO16949)
(SKU: 996)

From $249.94

Spring Rate: 0.45 kg/mm

$249.94
5 In Stock

Spring Rate: 0.47 kg/mm

$249.94
2 In Stock

Spring Rate: 0.50 kg/mm

$249.94
2 In Stock

Spring Rate: 0.48 kg/mm

$249.94
2 In Stock

HiCalibre Fork Springs 36 x 505 CFMoto MT450 Early CR KX RM CR with 43mm

HiCalibre

HiCalibre Fork Springs 36 x 505 CFMoto MT450 Early CR KX RM CR with 43mm

Proudly made in the USA
(SKU: 19-105)

From $345.00

Spring Rate: 0.36 kg/mm

$345.00
Special Order

SPECIAL ORDER Item from USA. 4-6 weeks delivery

SPECIAL ORDER Item from USA. 4-6 weeks delivery

Spring Rate: 0.38 kg/mm

$345.00
6 In Stock

Spring Rate: 0.40 kg/mm

$345.00
Special Order

Spring Rate: 0.42 kg/mm

$345.00
6 In Stock

Spring Rate: 0.44 kg/mm

$345.00
8 In Stock

Spring Rate: 0.46 kg/mm

$345.00
6 In Stock

Spring Rate: 0.48 kg/mm

$345.00
3 In Stock

Spring Rate: 0.50 kg/mm

$345.00
4 In Stock

Spring Rate: 0.54 kg/mm

$345.00
7 In Stock

Spring Rate: 0.58 kg/mm

$345.00
8 In Stock

Spring Rate: 0.60 kg/mm

$345.00
2 In Stock

Spring Rate: 0.62 kg/mm

$345.00
Special Order

Spring Rate: 0.64 kg/mm

$345.00
Special Order

Spring Rate: 0.66 kg/mm

$345.00
Special Order

Piston rod clamp 10mm / 12.5mm

Kayaba (KYB) Genuine Motorcycle Parts

Piston rod clamp 10mm / 12.5mm

Original KYB Motorcycle Suspension Tool
(SKU: 000.0655)

$96.80
Special Order

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
Nil 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
Nil Stock

Shock Seal Head Brass Bullet 5Pc Kit

Techtool

Shock Seal Head Brass Bullet 5Pc Kit

12.5x10 | 14x12 | 16x12 | 18x12 | 18x16 mm
(SKU: 93-031-00)

$76.95
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