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KTM

125 SX 2025

Track: Motocross Triesen

Back to Motocross TriesenTaken over from the track: Mixed · dry

KTM 125 SX 2025 - 75 kg, Intermediate, Neutral, Motocross Triesen

Set this first

For this profile the bike stays on its stock values. There is nothing to change - check the values below against the bike.

Key values

14 confirmed settings available.

Source

Released reference setup, confirmed by an expert · Moderately documented

Referenced (not linked):
  • KTM 125 SX MY2025 Owner's Manual, Art. no. 3240041en

Last reviewed: 29 Jul 2026

All technical values

Complete settings, technical data, components, gearing and geometry - including the adjusters that exist on the bike but do not carry a confirmed value yet.

14 confirmed values
BrakeBrembo Hydraulic Disc Brakes (260/220 mm)
ChainOEM Chain
Chain length118 linksOEM
ChassisOEM Chromoly Steel Frame
ClutchOEM Wet Multiplate Clutch
ECUKeihin EMS
ForkWP XACT 48mm AER Fork
Compressionclicks out from fully closed12 clicksOEM
Reboundclicks out from fully closed12 clicksOEM
Air pressure8.6 bar (124.73 psi)OEM
HandlebarOEM Handlebar
ShockWP XACT Monoshock
Sagloaded, rider in gear105 mmOEM
Static sagwithout load35 mmOEM
High-speed compressionclicks out from fully closed1.5 turnsOEM
Low-speed compressionclicks out from fully closed15 clicksOEM
Reboundclicks out from fully closed15 clicksOEM
Spring rate39 N/mmOEM
SwingarmOEM Aluminium Swingarm
TireDunlop Geomax MX34
Front tire pressure1 bar (14.5 psi)OEM
Rear tire pressure1 bar (14.5 psi)OEM
TransmissionOEM Final Drive
Front sprocket13 teethOEM
Rear sprocket50 teethOEM
Triple ClampOEM CNC Triple Clamp

After the ride

Tested a change? Record what happened. LAISA stores it against this bike and this condition. The recommendation above does not adapt to it automatically yet.

About this baseline

For a 75 kg Intermediate rider with a Neutral style, the baseline for the KTM 125 SX 2025 at Motocross Triesen shifts none of the 14 computed settings away from the OEM standard. All values are computed from OEM defaults and your rider and condition factors.

Value provenance: OEM = manufacturer specification · verified = confirmed by an expert · reviewed = editorially reviewed reference · community = confirmed by the community (median of at least three public setups) · computed = automatically derived by the LAISA engine. Automatically extracted and unconfirmed values never appear on public pages.

Next steps

Dial in your riding technique

Skills that change how the bike behaves - often the real fix before any clicker.

Explore technique

Matching protective gear

The right setup is half the job - the other half is protective gear matched to the discipline and conditions.

Gear for these conditions

Upgrades that fit

Optional aftermarket parts for this bike - the setup above comes first, these are next.

Exhaustfits
Pro Circuit Pro Circuit Auspuffbirne Works
Tirelikely fit
Bridgestone Bridgestone M203 ( 70/100-17 TT 40M M/C, NHS, Vorderrad )
Shocklikely fit
SPV2 Factory Shock Upgrade
Forklikely fit
SPV2 Factory Fork Upgrade
See more parts that fit
Set it up like a pro

Get it professionally dialed in - find a coach or a track day.

Find coaching

Setups for this bike

1 setups

Reference setups

Verified factory and expert setups.
ReferenceOEM Factory Baseline - KTM 125 SX 2025AI
SandClayMudRaceTrainingHardpack
Chain length118 links
Compressionclicks out from fully closed12 clicks
Reboundclicks out from fully closed12 clicks
Air pressure8.6 bar
Front sprocket13 teeth
Rear sprocket50 teeth
Sagloaded, rider in gear105 mm
Static sagwithout load35 mm
High-speed compressionclicks out from fully closed1.5 clicks
Low-speed compressionclicks out from fully closed15 clicks
Preload8 mm
Reboundclicks out from fully closed15 clicks
Spring rate39 N/mm
Front tire pressure1 bar
Rear tire pressure1 bar
Offset22 mm

Related

Similar bikes

Husqvarna FC 450 2024Kawasaki KX450F 2018KTM SX 250 2023KTM SX 250 2024Yamaha YZ 125 2025KTM 250 SX-F 2013KTM 350 SX-F 2025KTM 450 SX-F 2012

Matching tracks

1. RMC Reutlingen (Markwasen) (Baden-Württemberg)3 Palms Action Sports Park (Texas)5 Points MX Park (North Carolina)800 MX (Kentucky)AC Kronach (Bayern)ADAC OWL Enduro/MX Trainingsgelände (Nordrhein-Westfalen)AMC Bad Windsheim (Bayern)AMC Birkenfeld Motocross (Rheinland-Pfalz)

Comparisons

vs Husqvarna FC 450 2024vs Kawasaki KX450F 2018vs KTM SX 250 2023vs KTM SX 250 2024vs Yamaha YZ 125 2025vs KTM 250 SX-F 2013

Frequently asked questions

How much race sag for the KTM 125 SX 2025?

As a starting point, 105 mm of race sag at 75 kg rider weight. Measure with a helper and set it via spring preload.

What tire pressure is recommended for the KTM 125 SX 2025?

As a starting point: 1 bar front, 1 bar rear - computed for a 75 kg Intermediate rider. Check cold and adjust in small steps by feel.

What gearing (sprockets) does the KTM 125 SX 2025 run?

As a starting point, 13 teeth front / 50 teeth rear. For more acceleration go larger at the rear (or smaller at the front); for more top speed, the reverse.

Are these values safe to ride?

Baseline values are starting points generated from OEM defaults, rider weight, skill, style and conditions - not safety guarantees. Verify on the bike, adjust step by step and ride within your limits.

Baseline values are starting points generated from OEM defaults, rider weight, skill, style, and condition - or lifted from an expert/verified setup where one exists (see the provenance badge). They are not safety guarantees. Verify on the bike and ride within your limits.

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