Suspension Parts for 2020 BETA RR390 4T Racing EFI Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 2020 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 2020 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

75 kg

Engine Specifications

4 Stroke Engine 385.6 cc

FORKS INFO

Fork Manufacturer

Fork Type: 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
Oil Quanity: 350cc

Fork Spring Information

Standard Preload: 7 mm

Fork Comments

: Check floating piston for cracking

SHOCKS INFO

Shock Manufacturer

Shock Type: Sachs 46 mm ID

Shock Dimensions

Nitrogen Pressure: 175 psi
Shock Travel: 135 mm
Shock Shaft Outer Diameter: 16 mm
Standard Sag: 100 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 5 Weight
Wheel Travel: 290 mm

Shock Features

Non-rebuildable: No

Fitment-Matched Suspension Parts by Category

FORK COMPRESSION ADJUSTER ASSY

38 Parts

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FORK CARTRIDGE ROD PARTS

22 Parts

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FORK UPPER & LOWER TUBE PARTS

22 Parts

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FORK O-RINGS

19 Parts

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SUSPENSION LOCKNUTS & BUSHES

26 Parts

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TOOLS & LUBRICANTS

30 Parts

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All Fitment-Matched Suspension Parts

Browse All 195 Products for BETA RR390 4T Racing EFI 2020

Innertube clamp 48mm

Kayaba (KYB) Genuine Motorcycle Parts

Innertube clamp 48mm

Original KYB Motorcycle Suspension Tool
(SKU: 000.0668)

$162.14
Special Order

Innertube comp ff GasGas ECR 19-20 Left

Kayaba (KYB) Genuine Motorcycle Parts

Innertube comp ff GasGas ECR 19-20 Left

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110794603701)

$685.47
Special Order

Innertube comp ff GasGas ECR 19-20 Right

Kayaba (KYB) Genuine Motorcycle Parts

Innertube comp ff GasGas ECR 19-20 Right

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110794603601)

$685.47
Special Order

Innertube STD YZF250 08-11 / YZ125-250

Kayaba (KYB) Genuine Motorcycle Parts

Innertube STD YZF250 08-11 / YZ125-250

Original KYB Japan Motorcycle Suspension Parts
(SKU: 110794810501)

Colour: Chrome

Fork Inner Tube Ø d (mm): 44.23

Fork Inner Tube Length (mm): 600

Outside Ø D (mm): 48.0

$309.08
Coming Soon

KYB Factory Compression base valve assy KIT w/20N pr spring

KYB Factory Compression base valve assy KIT w/20N pr spring

Genuine KYB Factory Race Parts
(SKU: 160060002801)

$714.87
0% OFF RRP $718.11
Custom Order

KYB Factory Cylinder assy ff KIT YZ 2str/Beta/Xplor w/ TT spec

KYB Factory Cylinder assy ff KIT YZ 2str/Beta/Xplor w/ TT spec

Genuine KYB Factory Race Parts
(SKU: 160060003201)

$1,178.54
0% OFF RRP $1,183.90
Custom Order

KYB Factory Kit Fork Beta 20-26 Enduro

KYB Factory Kit Fork Beta 20-26 Enduro

Genuine KYB Factory Race Parts
(SKU: 162020002301)

$6,534.00
0% OFF RRP $6,563.70
Custom Order

KYB Factory Kit Shock Beta 20-26 Enduro

KYB Factory Kit Shock Beta 20-26 Enduro

Genuine KYB Factory Race Parts
(SKU: 162020002601)

$3,678.40
0% OFF RRP $3,695.12
Custom Order

KYB Factory Rubber under M6 securing screw

Kayaba (KYB) Genuine Motorcycle Parts

KYB Factory Rubber under M6 securing screw

Genuine KYB Factory Race Parts
(SKU: 161000000101)

$1.45
Special Order

Kayaba (KYB) Genuine Motorcycle Parts

O-ring

Original KYB Japan Motorcycle Suspension Parts
(SKU: 150290000701)

$4.86
Special Order

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