Suspension Parts for 2019 YAMAHA YZ125 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 2019 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 2019 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

0.4

Bike Type

MX

Ideal Rider Weight

75 kg

Engine Specifications

2 Stroke Engine 125 cc

FORKS INFO

Fork Manufacturer

Fork Type: KYB USD 48 mm OD

Fork Dimensions

Compression Nut Torque: 48 in-lb (0.56 kgf-m)
Fork Travel: 300 mm

Fork Features

Twin Chamber Fork: Yes

Fork Oil

Fork Oil Weight: SAE 2.5
Oil Quanity: 350cc

Fork Spring Information

Standard Preload: 8 mm

Fork Comments

: Check floating piston for cracking

SHOCKS INFO

Shock Manufacturer

Shock Type: KYB 46 mm ID

Shock Dimensions

Nitrogen Pressure: 142 psi
Shock Shaft Outer Diameter: 18 mm
Standard Sag: 103 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 2.5 Weight
Standard Preload: 24
Wheel Travel: 315 mm

Shock Features

Non-rebuildable: No

Fitment-Matched Suspension Parts by Category

FORK COMPRESSION ADJUSTER ASSY

38 Parts

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SUSPENSION LOCKNUTS & BUSHES

33 Parts

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TOOLS & LUBRICANTS

46 Parts

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All Fitment-Matched Suspension Parts

Browse All 256 Products for YAMAHA YZ125 2019

Zeta Racing Rear Shock Suspension lowering Kit. 46 and 50mm KYB Showa Sachs

DRC Zeta Hardware

Zeta Racing Rear Shock Suspension lowering Kit. 46 and 50mm KYB Showa Sachs

(SKU: ZE56-322)

From $49.95

Colour: Blue
Shock Bore Ø D (mm): 46.0

$49.95
2 In Stock

Colour: Red
Shock Bore Ø D (mm): 50.0

$60.50
2 In Stock

Cylinder head ff bearing press in/out

Kayaba (KYB) Genuine Motorcycle Parts

Cylinder head ff bearing press in/out

Original KYB Motorcycle Suspension Tool
(SKU: 000.0520)

$32.19
Coming Soon

Piston ring mounting set RCU 46mm

Kayaba (KYB) Genuine Motorcycle Parts

Piston ring mounting set RCU 46mm

Original KYB Motorcycle Suspension Tool
(SKU: 000.0623)

$191.18
Coming Soon

Piston ring mounting set FF 24mm

Kayaba (KYB) Genuine Motorcycle Parts

Piston ring mounting set FF 24mm

Original KYB Motorcycle Suspension Tool
(SKU: 000.0627)

$191.18
Coming Soon

Xtrig Preload Adjuster YZ250F/450 07-09, YZ 06-

XTRIG

Xtrig Preload Adjuster YZ250F/450 07-09, YZ 06-

Quickly adjust shock spring preload
(SKU: 10200002)

Thread Size: M56 x 1.5

$279.95
Coming Soon

KYB Genuine Single Linear Rate Fork Spring - 44od x 454mm

Kayaba (KYB) Genuine Motorcycle Parts

KYB Genuine Single Linear Rate Fork Spring - 44od x 454mm

Original KYB Motorcycle Suspension Spring
(SKU: 11005-44-454)

From $159.72

Spring Rate: 4.0 N/mm

$159.72
8% OFF RRP $172.79 Special Order

Order placed with KYB every week. 3-4 week delivery if in stock at KYB.

Order placed with KYB every week. 3-4 week delivery if in stock at KYB.

Spring Rate: 4.4 N/mm

$159.72
8% OFF RRP $172.79 Special Order

Spring Rate: 4.6 N/mm

$159.72
8% OFF RRP $172.79 Special Order

Spring Rate: 4.8 N/mm

$159.72
8% OFF RRP $172.79 Special Order

Spring Rate: 5.0 N/mm

$159.72
8% OFF RRP $172.79 Special Order

Spring Rate: 4.2 N/mm

$159.72
8% OFF RRP $172.79 Special Order

Top cap STD YZ06-14, CRF450 09-12, KX450F 08-10

Kayaba (KYB) Genuine Motorcycle Parts

Top cap STD YZ06-14, CRF450 09-12, KX450F 08-10

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110060003901)

$274.19
Coming Soon

Free piston spring ff 20N/mm 107mm / 26 dia

Kayaba (KYB) Genuine Motorcycle Parts

Free piston spring ff 20N/mm 107mm / 26 dia

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110240000901)

$125.63
Coming Soon

Spring seat ff steel for spring of free piston

Kayaba (KYB) Genuine Motorcycle Parts

Spring seat ff steel for spring of free piston

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110250000301)

$6.97
Special Order

Non return valve compression YZ08, KX08

Kayaba (KYB) Genuine Motorcycle Parts

Non return valve compression YZ08, KX08

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110570001701)

$5.24
Coming Soon

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