KTM 125 SX 2025


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KTM 125 SX
KTM 125 SX
KTM 125 SX

Description

There are very few sounds that can't be beaten. The crack of a soda can on a blistering hot day. The ping of the perfectly executed golf shot. And the scream of a 125 cc 2-stroke charging down a long straightaway. The 2025 KTM 125 SX takes its leads directly from the Factory Racing team and puts them to work like nothing else. Like the sound it makes, it cannot be beaten.

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  • 2025 Model

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Features

KTM 125 SX ELECTRONIC FUEL INJECTION
1
ELECTRONIC FUEL INJECTION
Pre-mix gets a remix across the 2-stroke KTM SX range, with Electronic Fuel Injection setting the standard. Now there's no more fiddly jetting setup pre-race, And thanks to the Keihin EFI and reed valve case design, you can be guaranteed of laying down optimal power at any altitude, all of the time.
KTM 125 SX ELECTRIC START
2
ELECTRIC START
Picture this; You're 7 laps into an absolute ripper of a race. You miss your line and end up stalling in a deep rut. But you don't sweat it. All you do is press the starter button and you blast off again to take the final flag. This is the reality on the 2025 KTM 125 SX. Thanks to a 12,8V 2 Ah lithium ion battery is placed under the rider's seat, a high-quality stator & pickup and super robust design, the only thing you'll be kicking - is ass.
KTM 125 SX EASY SUSPENSION ADJUSTMENT
3
EASY SUSPENSION ADJUSTMENT
As always, the suspension boasts an easy tool-free setup at both ends, ensuring you chase down the podium in total control. On the rear, a hand-adjustable dual compression control allows riders to adjust high- and low-speed settings in a matter of seconds. The forks on the front end are also easily adjusted thanks to hand-adjustable clickers on the bottom of the fork shoe and top cap.
KTM 125 SX EFI + POWER VALVE
4
EFI + POWER VALVE
With EFI comes great rideability. Along with the electronic fuel injection and a power valve on the KTM 125 SX, allowing for more usable power throughout the rev range. Smoother power means better traction. Better traction means holeshot heaven!
KTM 125 SX PERFORMANCE
5
PERFORMANCE
Designed to churn out torque the 2025 KTM 125 SX is set to continue its dominance in its class with unrelenting forward momentum. With an overall engine weight of only 17.86 kg and impressive horsepower figures, this lightweight powerplant retains its typical high-revving character, while laying down the grunt where it matters most.
KTM 125 SX SELECTABLE MAPS
6
SELECTABLE MAPS
Once again slicing into the 125 cc class with the leading edge of technology, the 2025 KTM 125 SX features a map select switch allowing the racer to switch between 2 engine maps. The White Map - or Map 1 - provides a linear, predictable power delivery ideally suited to attack hard-packed dirt with a leaner air-fuel mixture. Alternatively, the Green Map - Mapping 2 - is tuned for loose, thick sandy conditions with a richer mix.
KTM 125 SX WP XACT FORK
7
WP XACT FORK
Let's get the technical parts out of the way first; the 48 mm WP XACT AER forks fitted to the 2025 KTM SX and SX-F line-up features a capsulated air spring and pressurized oil chamber for progressive and consistent damping, while oil and air bypasses reduce pressure peaks. In combination with the mid-valve damping system, all this provides exceptional feedback and rider comfort. The fork also boasts new settings, which not only compliment the updated frame and rear linkage, but ensures stellar p
KTM 125 SX WP XACT SHOCK
8
WP XACT SHOCK
Keeping things in check at the rear, the WP XACT rear shock has also undergone some changes for 2025 using settings directly from the KTM Factory Racing Teams The improved frame and shock geometry mean more ground clearance at the linkage, making it less susceptible to bottoming out. While we're on the topic, smaller diameter linkage bolts save weight, while new linkage seals refine rear shock response and advanced damping characteristics.
KTM 125 SX ENERGY ABSORPTION
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ENERGY ABSORPTION
Besides the expertly crafted, hydro-formed, laser-cut, and robot-welded frame being engineered to provide exceptional rider feedback and straight-line stability, it consists of specifically calculated parameters of longitudinal and torsional flex. This means the frame acts as a "shock absorber" of sorts, making for a less harsh ride, resulting in less rider fatigue over many hard laps.
KTM 125 SX ABSOLUTE CONTROL
10
ABSOLUTE CONTROL
Get ready for a full-on berm assault. The 2025 KTM SX and SX-F machines have received major frame updates directly from Factory Racing efforts. For starters, the frame area around the rear shock mount has been updated and made more streamlined, with new engine mounts and cut-outs for improved chassis flex. The front area of the frame is also updated. with a different wall thickness than the previous model year, with renewed engine mounts. This adds up to a 300g weight saving and improved flex fo

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2023 SX Range

2023 SX Range

Finance and Descriptions

  • HP (Hire Purchase)

    MONTHLY PAYMENT

    Preferred Deposit

    Price: £199
    Max Price: £8999

    Preferred Term

    Month: 24
    Month: 60

    Terms & Conditions (HP)
    Cash Price £8999.00. Total Deposit . Total Amount of Credit . Payments of . Duration of Agreement is . Fees of £1.00 are included in the payments shown. Total Amount Payable is . Annual Fixed Interest Rate of %. Actual rate will be adjusted to include the deferred final payment. APR %.

    Rates available from 13.70% APR; 13.70% APR Representative. Finance is provided by MotoNovo Finance Limited, company no. 11556144, registered in Wales at One Central Square, Cardiff, CF10 1FS. Authorised and regulated by the Financial Conduct Authority under FRN 827851. All applications for credit are subject to eligibility and affordability criteria. The rate shown may not be the rate you are offered. MotoNovo interest rates start from 7.25% Fixed / 13.70% APR. MotoGB Ltd is authorised and regulated by the Financial Conduct Authority FCA 661247 and acts as a credit broker not a lender. MotoGB will receive a commission from the finance company for introducing the transaction. You can ask them to tell you the amount of that commission.

  • Specifications

    Engine

    ENGINE TYPE
    1-cylinder, 2-stroke engine

    DISPLACEMENT
    124.8

    BORE X STROKE
    54

    COMPRESSION RATION
    54.5

    CERTIFICATION
    Euro 5

    CLUTCH
    Wet multi-disc DS clutch, Brembo hydraulics

    GEARBOX
    5 Speed

    FINAL DRIVE
    Chain

    COOLING SYSTEM
    Liquid cooled

    STARTING
    Electric

    Chassis

    FRAME
    Central double-cradle-type 25CrMo4 steel

    FRONT SUSPENSION
    WP XACT-USD (AER), Ø 48 mm

    FRONT BRAKE
    260 mm

    REAR SUSPENSION
    WP XACT Monoshock with linkage

    REAR BRAKE
    220 mm

    Dimensions

    GROUND CLEARANCE
    359 mm

    UNLADEN WEIGHT
    92.4 kg

    USABABLE TANK VOLUME
    7.2 l

    SEAT HEIGHT
    958mm

  • OTR Payment Required
    This motorcycle must pay an On-The-Road (OTR) cost of £0. The OTR payment is essential for covering road usage and maintenance expenses. Please ensure that this fee is settled promptly to avoid any compliance issues.

£8999

HP £413.24 p/m
Displacement

125cc

Gearbox

5 Speed

Minimum Licence

Off Road Only

Colours

Orange

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