Suspension Parts for 2023 BETA RR390 4T Racing EFI 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 2023 BETA RR390 4T Racing EFI. 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 2023 BETA RR390 4T Racing EFI.

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

OFFROAD

Ideal Rider Weight

83 kg

Engine Specifications

4 Stroke Engine 385.6 cc

FORKS INFO

Fork Manufacturer

: KYB USD 48 mm OD

Fork Dimensions

Compression Nut Torque: 25 in-lb (0.29 kgf-m)

Fork Features

Twin Chamber Fork: Yes

Fork Oil

Fork Oil Weight: SAE 2.5
Fork Oil Level: 350cc mm
Oil Quanity: 2 Litres

Fork Spring Information

Standard Preload: 7 mm

Fork Comments

: Check floating piston for cracking

SHOCKS INFO

Shock Manufacturer

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 CARTRIDGE ASSEMBLY PARTS

17 Parts

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FORK COMPRESSION ADJUSTER ASSY

31 Parts

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FORK CARTRIDGE ROD PARTS

19 Parts

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FORK UPPER & LOWER TUBE PARTS

19 Parts

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FORK O-RINGS

16 Parts

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SUSPENSION LOCKNUTS & BUSHES

24 Parts

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TOOLS & LUBRICANTS

52 Parts

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All Fitment-Matched Suspension Parts

Browse All 195 Products for BETA RR390 4T Racing EFI 2023

Fork Seal Driver - 48mm

Techtool

Fork Seal Driver - 48mm

See Part # 93-009-00 for complete set
(SKU: 93-009-50)

$87.95
22 In Stock

24mm Shock Compression Adjuster Socket Tool

Techtool

24mm Shock Compression Adjuster Socket Tool

For KYB & Showa Shocks
(SKU: 93-019-00)

$30.00
23 In Stock

24mm Shock Compression Adjuster Socket Tool - with 24mm Hex

Techtool

24mm Shock Compression Adjuster Socket Tool - with 24mm Hex

For KYB & Showa Shocks
(SKU: 93-019-02)

$27.50
12 In Stock

16 x 12mm Shock Seal Head Bullet

Teknik Tools

16 x 12mm Shock Seal Head Bullet

Motorcycle Suspension Tools
(SKU: 93-025-00)

$19.95
25 In Stock

Shock Seal Head Bullet 5Pc Kit

Techtool

Shock Seal Head Bullet 5Pc Kit

Shock Seal Head Bullet 5pc Kit
(SKU: 93-031-00)

$76.95
17 In Stock

Techtool Fork Tube Tool & Cartridge Rod Holding Plate

Techtool

Techtool Fork Tube Tool & Cartridge Rod Holding Plate

For KYB, Showa & WP Twin or Open Chamber Forks
(SKU: 93-032-00)

$220.00
18 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

DRC FORK CAP WRENCH PRO | KYB | 49mm BLUE

Enzo Racing

DRC FORK CAP WRENCH PRO | KYB | 49mm BLUE

Developed by Enzo Racing
(SKU: D59-37-170)

$45.00
8 In Stock

DRC ENZO | Fork Outer Clamp/Holder | Quick Release

Enzo Racing

DRC ENZO | Fork Outer Clamp/Holder | Quick Release

Developed by Enzo Racing
(SKU: ED59-37-260)

$185.00
3 In Stock

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