Suspension Parts for 2017 BETA RR390 4T Factory Motorbikes | Guaranteed Fitment

Discover suspension parts guaranteed to fit the 2017 BETA RR390 4T Factory. 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 2017 BETA RR390 4T Factory.

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 390 cc

FORKS INFO

Fork Manufacturer

: Sachs 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 5
Fork Oil Level: 360cc mm
Oil Quanity: 2 Litres

Fork Spring Information

Standard Preload: 10 mm

SHOCKS INFO

Shock Manufacturer

Sachs: 50 mm ID

Shock Dimensions

Nitrogen Pressure: 175 psi
Shock Shaft Outer Diameter: 16 mm
Standard Sag: 100 mm
Shaft Nut Torque: 25 ft-lbs (34 NM)
Shock Oil: 2.5 Weight
Standard Preload: 12

Shock Features

Non-rebuildable: No

Shock Comments

: Replace stock piston band with WP steel band. Stock band fades. Lower rear shock

Fitment-Matched Suspension Parts by Category

CHASSIS PARTS

4 Parts

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FORK UPGRADE PARTS

1 Parts

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

4 Parts

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FORK SEALS & BUSHES

5 Parts

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FORK CARTRIDGE ROD PARTS

1 Parts

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SHOCK UPGRADE PARTS

3 Parts

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SHOCK SPRINGS
Ideal Spring Rate for kg: kg/mm ( N/mm)

1 Parts

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SHOCK SEAL CASE PARTS

4 Parts

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SHOCK PISTON PARTS

1 Parts

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SUSPENSION LOCKNUTS & BUSHES

1 Parts

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TOOLS & LUBRICANTS

7 Parts

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All Fitment-Matched Suspension Parts

Browse All 30 Products for BETA RR390 4T Factory 2017

KYB Suspension Tools Seal hammer 48mm

Kayaba (KYB) Genuine Motorcycle Parts

KYB Suspension Tools Seal hammer 48mm

Original KYB Motorcycle Suspension Tool
(SKU: 000.0673)

$128.81
1 In Stock

Xtrig Preload Adjuster BETA 15-18

XTRIG

Xtrig Preload Adjuster BETA 15-18

Quickly adjust shock spring preload
(SKU: 10600001)

Thread Size: M58 x 1.5

$279.95
2 In Stock

Kayaba (KYB) Genuine Parts Front Fork Piston Metal (Pair) 48mm KYB - WP

Kayaba (KYB) Genuine Motorcycle Parts

Kayaba (KYB) Genuine Parts Front Fork Piston Metal (Pair) 48mm KYB - WP

OEM KYB Japan Motorcycle Suspension Service Parts
(SKU: 110034800102)

Inside Diameter d (mm): 46.5

Fork Inner Tube Ø d (mm): 48.0

Height H (mm): 20.0

Outside Ø D (mm): 48.5

Wall Thickness (mm): 1.0

$42.78
117 In Stock

HiCalibre Fork Springs 43.2 x 457 KTM 125 250 2007 950 990

HiCalibre

HiCalibre Fork Springs 43.2 x 457 KTM 125 250 2007 950 990

Proudly made in the USA
(SKU: 19-162)

spring rate: 0.60 kg/mm

$245.00
1 In Stock

spring rate: 0.64 kg/mm

$245.00
1 In Stock

spring rate: 0.46 kg/mm

$245.00
Special Order

spring rate: 0.48 kg/mm

$245.00
Special Order

spring rate: 0.68 kg/mm

$245.00
1 In Stock

spring rate: 0.40 kg/mm

$245.00
Special Order

spring rate: 0.36 kg/mm

$245.00
Special Order

spring rate: 0.44 kg/mm

$245.00
Special Order

spring rate: 0.42 kg/mm

$245.00
Special Order

spring rate: 0.38 kg/mm

$245.00
Special Order

spring rate: 0.62 kg/mm

$245.00
1 In Stock

spring rate: 0.56 kg/mm

$245.00
Special Order

spring rate: 0.66 kg/mm

$245.00
1 In Stock

spring rate: 0.58 kg/mm

$245.00
1 In Stock

spring rate: 0.70 kg/mm

$245.00
Special Order

spring rate: 0.54 kg/mm

$245.00
Special Order

spring rate: 0.50 kg/mm

$245.00
Special Order

HiCalibre Shock Spring 60 x 260 Common Fitment: Sachs 46 and 50

HiCalibre

HiCalibre Shock Spring 60 x 260 Common Fitment: Sachs 46 and 50

Proudly made in the USA
(SKU: 20-073)

Colour: Black or White
spring rate: 6.0 kg/mm

$245.00
1 In Stock

Colour: Black or White
spring rate: 5.8 kg/mm

$245.00
2 In Stock

Colour: Black or White
spring rate: 6.2 kg/mm

$245.00
2 In Stock

Colour: Black or White
spring rate: 5.2 kg/mm

$245.00
Special Order

Colour: Black or White
spring rate: 6.6 kg/mm

$245.00
Special Order

Colour: Black or White
spring rate: 6.4 kg/mm

$245.00
2 In Stock

Colour: Black or White
spring rate: 5.6 kg/mm

$245.00
2 In Stock

Colour: Black or White
spring rate: 4.8 kg/mm

$245.00
2 In Stock

Colour: Black or White
spring rate: 5.4 kg/mm

$245.00
4 In Stock

Colour: Black or White
spring rate: 6.8 kg/mm

$245.00
Special Order

Colour: Black or White
spring rate: 4.6 kg/mm

$245.00
2 In Stock

Colour: Black or White
spring rate: 7.4 kg/mm

$245.00
1 In Stock

Colour: Black or White
spring rate: 7.8 kg/mm

$245.00
3 In Stock

Colour: Black or White
spring rate: 7.6 kg/mm

$245.00
2 In Stock

Colour: Black or White
spring rate: 8.0 kg/mm

$245.00
3 In Stock

Colour: Black or White
spring rate: 8.4 kg/mm

$245.00
3 In Stock

Colour: Black or White
spring rate: 8.2 kg/mm

$245.00
3 In Stock

Colour: Black or White
spring rate: 7.2 kg/mm

$245.00
1 In Stock

Colour: Black or White
spring rate: 7.0 kg/mm

$245.00
2 In Stock

Colour: Black or White
spring rate: 5.0 kg/mm

$245.00
1 In Stock

Colour: Black or White
spring rate: 4.4 kg/mm

$245.00
2 In Stock

Colour: Black or White
spring rate: 8.6 kg/mm

$245.00
1 In Stock

RCU RESERVOIR BLADDER CONVERSION 49.00mm SACHS

K-Tech

RCU RESERVOIR BLADDER CONVERSION 49.00mm SACHS

Sachs 49mm
(SKU: 211-900-125)

$179.95
2 In Stock

Teflon Shaft Bushing - 16 x 18 x 12

Teknik Motorsport

Teflon Shaft Bushing - 16 x 18 x 12

16mm id x 18mm od x 12mm Length
(SKU: 22-076-00)

$2.75
508 In Stock

Shock Oil Seal SACHS 16.00X24.50X3.40mm

Capelli Race

Shock Oil Seal SACHS 16.00X24.50X3.40mm

(SKU: 22-431-00)

$16.50
7 In Stock

WP Fork Spring Guide 48600557S HYDR.STOP L=200 D=31.9 CPL. 07

WP Genuine Parts

WP Fork Spring Guide 48600557S HYDR.STOP L=200 D=31.9 CPL. 07

Fits SACHS fork
(SKU: 24-019-17)

$99.00
1 In Stock

All Balls Rear Shock Seal Kit- Husky --NO LONGER AVAILABLE--

All Balls

All Balls Rear Shock Seal Kit- Husky --NO LONGER AVAILABLE--

16 ID 50 OD
(SKU: 37-1124)

Shock Bore Ø D (mm): 50.0

Shock Shaft Ø D (mm): 16.0

Height H (mm): 27.2

$95.00
1 In Stock

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