Motocross · 2-stroke · Open

KTM 300 SX

2027 · The power-to-weight rule book.

The most power per kilo in the MX Open gate, with factory-team learnings and none of the four-stroke upkeep. Available through NTG for teams and resellers, EU-wide.

€ 8 630net · excl. VAT · per unit

See how to order Technical details
2027 KTM 300 SX Right view 2027 KTM 300 SX Front ¾ view 2027 KTM 300 SX Left view

01.Before the gate

Setup, injection and a starter button — the two-stroke that asks nothing of you before the gate drops.

4 features
2027 KTM 300 SX — Easy suspension adjustment

Click into action

Easy suspension adjustment

Tool-free at both ends. The shock has hand-adjustable high- and low-speed compression, so a change takes seconds, not a session. Fork clickers sit on the shoe and the top cap, also by hand. You chase the setting between motos, not between weekends.

2027 KTM 300 SX — Electronic fuel injection

No jets, only rocket ships

Electronic fuel injection

No jets, no pre-race fiddling. Keihin EFI with a reed-valve case meters the mixture for altitude and temperature on its own, so the bike makes the same power at sea level and in the mountains. The fuel-connector protector cap keeps dirt and knocks away from the one part you don't want to fail.

2027 KTM 300 SX — Electric start

Press and go

Electric start

Stall in a rut on lap seven, press a button, go. A 12.8 V / 2 Ah lithium-ion battery under the seat, a quality starter and pickup — kickstarting a race two-stroke is history.

2027 KTM 300 SX — Serviceability

Less tool, more track

Serviceability

Service parts are placed where you can reach them and suspension is adjustable without a toolbox. Faster trackside and off-season maintenance for teams — and a bike a privateer can run without a crew.

02.Start strong

293 cc of two-stroke at 23.9 kg of engine. The Open class doesn't have a lighter answer.

3 features
2027 KTM 300 SX — Performance

Unmatched performance

Performance

The 300 is the outlier in the Open class: maximum power at the lowest possible weight, with a 23.9 kg engine and running costs a four-stroke can't match. For riders who want the big-bike drive without the big-bike mass — and for teams counting rebuild hours — it is the obvious choice.

  • 293.2cm³
  • 23.9 kgengine
  • 99.4 kgwithout fuel
2027 KTM 300 SX — Selectable maps

Pick your power

Selectable maps

Two engine maps on a bar-mounted switch. Map 1 is linear and predictable for slick or muddy tracks; Map 2 is crisp and explosive when the dirt is good. Change it on the line, not in the pits.

2027 KTM 300 SX — EFI + power valve

Smoother delivery

EFI + power valve

EFI plus a power valve is what makes a modern two-stroke rideable: usable power across the whole rev range instead of one narrow hit. Smoother delivery means more traction, and more traction means holeshots.

03.Calm under fire

The same factory-developed frame as the four-strokes — flex where you want it, none where you don't.

2 features
2027 KTM 300 SX — Absolute control

Sleeker to scrub cleaner

Absolute control

Revised frame with KTM Factory Racing input: a streamlined shock-mount area, optimised engine mounts and cut-outs for controlled chassis flex, tuned wall thickness at the front. Built for a full-on berm assault.

2027 KTM 300 SX — Ergonomics

Fluid rider motion

Ergonomics

Bi-compound tank shrouds feed the radiators and give real knee grip when you're standing. A tighter fuel-tank roll means less frame scrubbing — bodywork that lasts a season, not a month — and a rider triangle that keeps you locked in on the pegs.

04.Hit the big stuff

WP XACT front and rear with factory-derived settings, and rubber that holds.

4 features
2027 KTM 300 SX — WP XACT fork

Unflappable front end

WP XACT fork

48 mm WP XACT AER: capsulated air spring and pressurised oil chamber for progressive, consistent damping; bypasses trim the pressure peaks; mid-valve damping gives feedback you can read. One air valve for preload, hand clickers for compression and rebound. The WP pump ships in the box.

  • Ø 48 mm
  • 310 mmtravel
2027 KTM 300 SX — WP XACT shock

Track smoother

WP XACT shock

Settings lifted from the factory teams. Frame and shock geometry give more ground clearance at the linkage, so it stops bottoming; smaller linkage bolts save weight; refined seals give a cleaner stroke.

  • 300 mmtravel
2027 KTM 300 SX — Stability

Racing on rails

Stability

A forged steering-head connection and CNC-milled triple clamps keep the fork tubes perfectly aligned — responsive, smooth fork action and an honest front end across ruts. A stiffened rear brake pedal adds bending resistance and better brake feel.

2027 KTM 300 SX — Tires

Digging the dirt

Tires

Dunlop GEOMAX MX34. Rigid carcass and a compound that holds performance up to 30 % longer; Progressive Cornering Block Technology for berm grip; a tall, wide centre block at the rear for drive — and a pattern that clears mud instead of packing it.

05.Maintaining momentum

Nothing to hook, nothing to snag, and a frame that soaks up the hits so you don't have to.

3 features
2027 KTM 300 SX — Ground clearance

Nothing to hold you back

Ground clearance

Shock geometry keeps the linkage high, and topology-optimised die-cast footpegs are far less likely to hook a deep rut or a take-off when you're scrubbing.

  • 354 mmground clearance
  • 958 mmseat height
2027 KTM 300 SX — Consistency

Precise, lap after lap

Consistency

A durable chain guide and guard resist hooking in deep mud and keep dirt from building up around the swingarm and sprocket. For 2027 the wiring harness has new fixing points and routing, so it stops being the part that wears first.

2027 KTM 300 SX — Energy absorption

Unobtrusive impact

Energy absorption

Hydro-formed, laser-cut, robot-welded 25CrMo4 steel with calculated longitudinal and torsional flex. The frame works as a shock absorber of its own — a less harsh ride, straight-line stability, and less fatigue over thirty hard laps.

06.Warranty & support

New bikes, delivered through authorised channels, with the paperwork the warranty is tied to.

2027 KTM 300 SX — Premium manufacturer's warranty

Model year 2027 onwards

Premium manufacturer's warranty

Offroad bikes from model year 2027 carry up to 1 year of manufacturer coverage. It stays valid with intended use and scheduled services at an authorised KTM dealer, under the standard conditions on the delivery certificate. Every bike NTG supplies is new and comes with that certificate.

Technical details

Specifications

Manufacturer data, model year 2027. Delivered spec can vary by market — we confirm on the order confirmation.

Design1-cylinder, 2-stroke
Displacement293.2 cm³
Transmission5-speed
Fuel systemKeihin EFI, 39 mm throttle body
Engine managementVitesco Technologies EMS, 2 maps
ClutchWet DDS multi-disc, Brembo hydraulics
Primary drive26:72
Engine weight23.9 kg
FrameCentral double-cradle, 25CrMo4 steel
SubframeAluminium-reinforced polyamide
Front brakeDisc, Brembo
Rear brakeDisc, Brembo
Chain520, non-sealed
TiresDunlop GEOMAX MX34
FrontWP XACT-USD (AER), Ø 48 mm
RearWP XACT monoshock with linkage
Travel front310 mm
Travel rear300 mm
Front adjustmentAir preload, compression, rebound
Rear adjustmentHigh/low-speed compression, rebound
Seat height958 mm
Ground clearance354 mm
Tank capacity7.2 l
Weight, without fuel99.4 kg

Order

2027 KTM 300 SX

New, uncrated, delivered through authorised channels. Priced net, excl. VAT, for teams and resellers. Tell us the quantity and destination and we quote within one working day.

  • AvailabilityOn request
  • Price€ 8 630 net · excl. VAT
  • DeliveryEU-wide
Request a quote
In list
1
Review & send

Add several models, set quantities, then send everything as one request from the order bar.

Product images and technical data © KTM AG, used for product identification. North Trade Group is an independent trader and not an authorised KTM dealer or distributor. Specifications subject to change by the manufacturer.