Suspension Parts for 2025 BETA RX 300 Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 2025 BETA RX 300. 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 2025 BETA RX 300.

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

Bike Type

MX

Ideal Rider Weight

83 kg

FORKS INFO

Fork Manufacturer

Fork Type: KYB USD 48 mm OD

Fork Dimensions

Compression Nut Torque: 24 in-lb (0.29 kgf-m)

Fork Features

Twin Chamber Fork: Yes

Fork Oil

Fork Oil Weight: SAE 2.5
Oil Quanity: 350cc

Fork Spring Information

Standard Preload: 6 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: 16 mm
Standard Sag: 103 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 2.5 Weight
Standard Preload: 24

Shock Features

Non-rebuildable: No

Shock Comments

: Replace alloy shock collars with steel if binding.

Fitment-Matched Suspension Parts by Category

FORK UPGRADE PARTS

13 Parts

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FORK CARTRIDGE ASSEMBLY PARTS

9 Parts

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FORK SEALS & BUSHES

8 Parts

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FORK COMPRESSION ADJUSTER ASSY

25 Parts

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FORK CARTRIDGE ROD PARTS

14 Parts

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FORK UPPER & LOWER TUBE PARTS

11 Parts

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FORK O-RINGS

12 Parts

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SHOCK UPGRADE PARTS

6 Parts

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SHOCK BLADDER PARTS

3 Parts

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SHOCK BODY PARTS

5 Parts

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SUSPENSION LOCKNUTS & BUSHES

17 Parts

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TOOLS & LUBRICANTS

10 Parts

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All Fitment-Matched Suspension Parts

Browse All 110 Products for BETA RX 300 2025

48mm KYB SKF Mud Scraper

SKF Sealing

48mm KYB SKF Mud Scraper

Removable Scraper
(SKU: KIT-MS48KM)

$66.00
4 In Stock

Bottom end lock nut 16mm steel

Kayaba (KYB) Genuine Motorcycle Parts

Bottom end lock nut 16mm steel

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120350007301)

$10.47
4 In Stock

Compression adjuster rcu, o-ring body

Kayaba (KYB) Genuine Motorcycle Parts

Compression adjuster rcu, o-ring body

Original KYB Japan Motorcycle Suspension Parts
(SKU: 120070000101)

$4.86
16 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
1 In Stock

Cylinder head ff KX450F 10-12, CRF450R 11-12, YZF

Kayaba (KYB) Genuine Motorcycle Parts

Cylinder head ff KX450F 10-12, CRF450R 11-12, YZF

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110190004201)

$186.95
2 In Stock

Cylinder head ff o-ring/o-ring piston adjuster rcu

Kayaba (KYB) Genuine Motorcycle Parts

Cylinder head ff o-ring/o-ring piston adjuster rcu

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110190002501)

$4.86
8 In Stock

Free piston ff circlip near bushing

Kayaba (KYB) Genuine Motorcycle Parts

Free piston ff circlip near bushing

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110290000201)

$3.74
256 In Stock

Free piston ff shaft seal 09

Kayaba (KYB) Genuine Motorcycle Parts

Free piston ff shaft seal 09

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110310000201)

$31.16
412 In Stock

Front Fork Bleed Bolt o-ring

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork Bleed Bolt o-ring

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110100000101)

$2.24
27 In Stock

Front Fork Bush Cylinder Head 12.5mm

Kayaba (KYB) Genuine Motorcycle Parts

Front Fork Bush Cylinder Head 12.5mm

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110231000301)

$10.97
19 In Stock

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