BETA RR390 4T RACING EFI 2018

Calculate Spring Rates

Rider Weight

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
46 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
5 Weight

Shock Features

Non-rebuildable
No

Shock Comments

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





Eibach Suspension Technology

Eibach EMS Moto Fork Springs 43.2 x 455 (43.5-453)

43.2mm OD x 455mm Free Length
(SKU: 967)
$249.94
Special Order
Shipped 2-3 Days. Stock at Eibach Australia.
Shipped 2-3 Days. Stock at Eibach Australia.
$249.94
Special Order
Shipped 2-3 Days. Stock at Eibach Australia.
Shipped 2-3 Days. Stock at Eibach Australia.

Eibach Suspension Technology

Eibach EMS Moto Fork Springs 43.5 x 461

43.5mm OD x 461mm Free Length
(SKU: 970)
$249.94
Special Order
Shipped 2-3 Days. Stock at Eibach Australia.
Shipped 2-3 Days. Stock at Eibach Australia.


SKF Sealing

SKF 48mm Sachs Fork Seal & Wiper Set

Requires 2 kits for complete fork service.
(SKU: SKF48Z)
Colour:   Green
Seal Outer Ø D (mm):   58.20
Seal Height H (mm):   9.0
Seal Wiper Outside Ø D1 (mm):   58.70
Seal Wiper Height H1 (mm):   5.7
Fork Inner Tube Ø d (mm):   48.0
$59.95
20 In Stock

SKF Sealing

SKF 48mm Sachs Fork Seal & Wiper Set - Heavy Duty

Requires 2 kits for complete fork service.
(SKU: SKF48ZHD)
Colour:   Green
Seal Outer Ø D (mm):   58.20
Seal Height H (mm):   9.0
Seal Wiper Outside Ø D1 (mm):   58.70
Seal Wiper Height H1 (mm):   5.7
Fork Inner Tube Ø d (mm):   48.0
$59.95
3 In Stock


HiCalibre

HiCalibre Shock Spring 60 x 260 Sachs 46 and 50

60mm id x 260mm free length
(SKU: 20-073)