Make Model

KTM 300 EXC Hardenduro




Two stroke, Two stroke, single cylinder, with reed intake and exhaust control


293.2 cc / 17.9 cu-in
Bore x Stroke 72 x 72 mm
Lubrication Electronically Regulated Oil Pump
Cooling System Liquid cooled


Keihin EFI, 39 mm throttle body


Vitesco Technologies EMS




Wet, DDS multi-disc clutch, Brembo hydraulics


6 Speed
Primary Drive 26:72
Secondary Gear Ratio 14:45

Final Drive

X-Ring 520


Central double-cradle-type 25CrMo4 steel

Front Suspension


Front Wheel Travel

300 mm / 11.8 in

Rear Suspension

WP XPLOR Monoshock with PDS, Aluminium-reinforced polyamide

Rear Wheel Travel

310 mm / 12.2 in

Front Brakes

Single 260 mm disc, 2 piston caliper

Rear Brakes

Single 220 mm disc, 1 piston caliper
Front Wheel 21 x 1.6 in
Rear Wheel 19 x 2.15 in

Front Tyre


Rear Tyre


Steering Head Angle



1489 mm / 58.6 in

Ground Clearance

347 mm / 13.7 in

Seat Height

963 mm / 37.9 in

Weight without fuel

106.3 kg / 234.4 lbs

Fuel Capacity 

9 Litres / 2.4 US gal

From a press release by KTM:

The 2025 KTM 300 EXC HARDENDURO draws inspiration from races bearing its name and stands as a testament to conquering the toughest enduro competitions worldwide.

Since its launch in 2024, the KTM 300 EXC HARDENDURO has become the premier model in the KTM Enduro lineup, achieving the top position in the 2025 range and available directly from dealerships.

Having already clinched victories in the first two rounds of the 2024 FIM Hard Enduro World Championship and achieved three consecutive wins at the Red Bull Erzbergrodeo with Manuel Lettenbichler at the helm, the KTM 300 EXC stands as a formidable competitor. Through his and other pro-racer feedback, the 2025 KTM 300 EXC HARDENDURO is engineered to provide the ultimate READY TO RACE Enduro package.

The new standout technical feature of the 48 mm WP XACT closed-cartridge spring fork on the 2025 KTM 300 EXC HARDENDURO is the innovative adjustment of the base valve preload, which mirrors the design of our high-end aftermarket pro components. Adjusting the spring preload on the base valve significantly impacts and offers a broader range of adjustments.

The base valve preload adjusters enable seamless, on-the-fly adjustments by hand, with a total travel distance of 4 mm—a minor change that produces substantial effects.

For the rider, this translates to quick and effortless fork setup modifications: increasing preload for improved stability on fast enduro tracks or decreasing it for enhanced comfort in technical riverbeds. This adjustment impacts almost the entire stroke of the fork, and now it translates to full adjustable suspension, both front and rear.

Additionally, upgrades have been made to the rear shock settings, chain glider, and fuel tank roll.

However, as its nameplate suggests, the HARDENDURO is built to tackle the toughest terrain, featuring a collection of select and purposeful options over the standard KTM 300 EXC.

These include various protection parts, along with several signature HARDENDEURO-specific parts, such as;
- New Black and Orange, Hardenduro Graphics
- Orange Frame - Black Factory Racing Seat
- Map-Select Switch
- Orange Factory Frame Protector Set
- Metzeler 6 Days Extreme Tires
- Wrap-Around Handguard Kit
- Radiator Fan
- Black Anodized CNC Machined Triple Clamps
- Wp Xact closed Cartridge Front Fork featuring new Base Valve Preload Adjusters
- Skid Plate
- Floating Front Brake Disc
- Front Brake Disc Guard
- Solid Rear Brake Disc
- Orange Rear Brake Disc Guard
- Orange Supersprox Stealth Rear Sprocket
- Orange Oil Plug
- Clutch Slave Cylinder Protection
- Pull Straps