KTM 250 SX 2021

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

Stock Shock Spring Rate

42 N/mm

Bike Type

MX

Ideal Rider Weight

80 kg

Engine Specifications

2 Stroke Engine 249 cc

Forks Info

Fork Manufacturer

WP USD 48 mm OD

Fork Dimensions

Compression Nut Torque
25 in-lb (0.29 kgf-m)
Fork Travel
295 mm

Fork Features

Twin Chamber Fork
Yes

Fork Oil

Fork Oil Weight
SAE 4
Fork Oil Level
380cc Cartridge. 200cc in each outer. 180/240 min/max mm
Oil Quanity
2 Litres required for job

Fork Comments

Red adjuter right rebound side. Stock Orange seals produce drag after a few hours use.

Shocks Info

Shock Manufacturer

WP
50 mm ID

Shock Dimensions

Nitrogen Pressure
150 psi
Shock Travel
140 mm
Shock Shaft Outer Diameter
18 mm
Standard Sag
105-115 mm
Shaft Nut Torque
25 ft-lbs (34 NM)
Shock Oil
5 Weight
Standard Preload
7-8mm

Shock Features

Non-rebuildable
No

Shock Spring Information

Spring Rate - Claimed
42 N/mm kg/mm

Shock Comments

Spring rate from WP official
Krooztune WP 48mm AER Air Fork to SFF Coil Spring Conversion Kit - with Optional Spring - KTM / Husqvarna (All) 2016-2020 & Long TX/FX 2021-on
KroozR by Krooztune

Krooztune WP 48mm AER Air Fork to SFF Coil Spring Conversion Kit - with Optional Spring - KTM / Husqvarna (All) 2016-2020 & Long TX/FX 2021-on

Proudly made in Australia
(SKU: KT-WPATS48)
Spring Rate: 8.6 N/mm
$645.00
Special Order
Manufactured in 3-4 weeks. Please contact us to get an accurate delivery date.
Manufactured in 3-4 weeks. Please contact us to get an accurate delivery date.
KYB Genuine Front Fork Slide Metal (Pair) 48mm WP
Kayaba (KYB) Genuine Parts

KYB Genuine Front Fork Slide Metal (Pair) 48mm WP

OEM KYB Japan
(SKU: 110044800102)
Inside Diameter d (mm):   48.0
Fork Inner Tube Ø d (mm):   48.0
Height H (mm):   12.0
Outside Ø D (mm):   52.0
Wall Thickness (mm):   2.0
$48.93
51 In Stock
Outer Guide Bush 48 x 12 x 2.0 Aftermarket
Teknik Motorsport

Outer Guide Bush 48 x 12 x 2.0 Aftermarket

48mm id x 12mm tall x 2.0mm thick
(SKU: 24-580-01)
Inside Diameter d (mm):   48.0
Fork Inner Tube Ø d (mm):   48.0
Height H (mm):   12.0
Outside Ø D (mm):   52.0
Wall Thickness (mm):   2.0
$6.60
473 In Stock
SKF WP Fork Seal Kit 48mm (Dual Comp)
SKF Sealing

SKF WP Fork Seal Kit 48mm (Dual Comp)

Requires 2 kits for complete fork service.
(SKU: SKF-DUAL-48W)
Colour:   Green/Orange
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
$62.95
1 In Stock
SKF 48mm WP Fork Seal & Wiper Set
SKF Sealing

SKF 48mm WP Fork Seal & Wiper Set

Requires 2 kits for complete fork service.
(SKU: SKF48W)
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
Coming Soon
Shipped 1 Week
SKF 48mm WP Fork Seal & Wiper Set - Heavy Duty
SKF Sealing

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

Requires 2 kits for complete fork service.
(SKU: SKF48WHD)
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
Coming Soon
Shipped 1 Week
Teknik Shock Spring 63 x 260 (Eibach 898)
Teknik Motorsport

Teknik Shock Spring 63 x 260 (Eibach 898)

63mm id x 260mm free length
(SKU: 63-260)
Eibach EMS Moto Shock Spring Kit 62.8 x 247 (62-245)
Eibach Suspension Technology

Eibach EMS Moto Shock Spring Kit 62.8 x 247 (62-245)

62.8mm ID x 247mm Free Length
(SKU: 882)
Spring Rate: 4.3 kg/mm
$249.94
Special Order
Shipped 2-3 Days. Stock at Eibach Australia.
Shipped 2-3 Days. Stock at Eibach Australia.
Spring Rate: 6.7 kg/mm
$249.94
Special Order
Shipped 2-3 Days. Stock at Eibach Australia.
Shipped 2-3 Days. Stock at Eibach Australia.