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2025 KTM 390 Adventure R Overview
For 2025, KTM offers the 390 Adventure R as an enduro / off-road motorcycle with 398.7 cc on tap. The 2025 KTM 390 Adventure R is built around a Four stroke, single cylinder, DOHC with finger followers, 4 valves engine, a compression ratio of 12.6:1. Out on the road, the 390 Adventure R delivers 33 kW @ 8500 rpm of peak power and 39 Nm @ 7000 rpm of torque. In everyday use, the 2025 390 Adventure R tips the scales at 165 kg, carries a 14 L fuel tank, offers a seat height of 870 mm and spans a 1481 mm wheelbase. That's roughly 33.8 kg lighter than the average enduro / off-road motorcycle in our database. Every technical detail, from suspension travel to tyre sizes, is covered in the full 2025 KTM 390 Adventure R spec sheet below.
2025 390 Adventure R - Pros & Cons
Strengths
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Strong power output: Peak output on the 390 Adventure R is 33 kW @ 8500 rpm and 39 Nm @ 7000 rpm of torque - strong numbers for what it is.
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Fuel injection: No choke, no jetting, no altitude compensation to think about - fuel injection just works across a wider range of conditions than carburetion.
Considerations
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Tall seat height: A 870 mm seat puts flat-footing out of reach for a lot of riders - sit on it in person before committing.
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Chain final drive upkeep: A chain drivetrain is the most common setup in its class, but it's also the one that demands the most regular hands-on maintenance.
Wear Points & Servicing Notes
Cooling system servicing
With Liquid Cooled, thermal management is largely automatic, but the coolant has a service life of its own - replace it on the manufacturer's interval to protect the water passages and thermostat.
Fuelling & injector care
Fuelling on the 390 Adventure R comes from Bosch fuel injection. Cold starts and throttle response stay consistent across altitude and temperature, the main practical edge over a carbureted equivalent.
Suspension condition on used examples
Suspension duties are handled by 43mm WP APEX 43, compression and rebound adjustble, 30 clicks up front and WP APEX Split Piston, preload with top ring and rebound, 20 clicks at the rear. Weeping fork seals aren't a dealbreaker on a used bike, but they're a fair basis for negotiating price.
Final drive maintenance
Chain final drive on the 390 Adventure R means routine lubing and tension checks are part of ownership - skip them and sprocket wear accelerates noticeably.
Frame & chassis check
The Steel trellis frame, powder coated, with bolt-on subframe chassis holds up well with normal use; on a used bike it's still worth checking the head-stock and swingarm pivot area for impact damage or corrosion.
390 Adventure R - Buying & Maintenance Guide
What to check before buying
A pre-purchase check on the 2025 KTM 390 Adventure R should cover the same ground every time: service history, chain and sprocket condition, and any oil seepage around the casings. Start it from cold if you can - a well-kept 390 Adventure R settles to a smooth idle within seconds.
Oil and filter changes
Oil changes are the cheapest insurance you can buy for a 390 Adventure R's engine - keep to the manufacturer's interval rather than stretching it. Use the viscosity grade the manual specifies, not whatever's on sale.
Fuel system care
Injector systems like the 390 Adventure R's hold up well with basic care - decent fuel, an occasional cleaner additive, and draining old fuel before any layup longer than three months.
2025 KTM 390 Adventure R - Frequently Asked Questions
What engine does the 2025 KTM 390 Adventure R have?
The 2025 KTM 390 Adventure R uses a Four stroke, single cylinder, DOHC with finger followers, 4 valves engine with 398.7 cc of displacement. It is liquid cooled.
How much does the 2025 KTM 390 Adventure R weigh?
The 2025 KTM 390 Adventure R weighs 165 kg. This is the manufacturer's wet figure.
How much power does the 2025 KTM 390 Adventure R make?
The 2025 KTM 390 Adventure R produces 33 kW @ 8500 rpm of power and 39 Nm @ 7000 rpm of torque. These are peak figures.
What is the fuel tank capacity of the 2025 KTM 390 Adventure R?
The 2025 KTM 390 Adventure R has a 14 L fuel tank. At around 5-6 litres per 100 km, that is roughly 233-280 km between stops.
Is the 2025 KTM 390 Adventure R suitable for shorter riders?
The 2025 KTM 390 Adventure R has a seat height of 870 mm. This is towards the tall end of the spectrum and will require most riders under 175 cm to tiptoe at stops.
What brakes does the 2025 KTM 390 Adventure R have?
The 2025 KTM 390 Adventure R uses Single at the front and Single 240 mm disc, Bybre floating 1 piston caliper at the rear.
What tyre sizes does the 2025 KTM 390 Adventure R use?
The 2025 KTM 390 Adventure R runs 90/90 x R21 M/C 54T M+S front and 140/80 x R18 M/C 70T M+S rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.
What gearbox does the 2025 KTM 390 Adventure R have?
The 2025 KTM 390 Adventure R is fitted with a 6 Speed transmission.
Key Specifications
Engine
Four stroke, single cylinder, DOHC with finger followers, 4 valves
Power
33 kW / 44.3 hp @ 8500 rpm
Torque
39 Nm / 28.7 lb-ft @ 7000 rpm
Top Speed
Not published by manufacturer
Fuel Capacity
14 L / 3.7 US gal
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Full 2025 KTM 390 Adventure R Specifications
Year
2025
Make Model
KTM 390 Adventure R
Seat Height
870 mm / 34.3 in
Wheelbase
1481 mm / 58.3 in
Fuel Capacity
14 L / 3.7 US gal
Wet Weight
165 kg / 364 lbs
Displacement
398.7 cc / 24.3 cu-in
Engine Detail
Four stroke, single cylinder, DOHC with finger followers, 4 valves
Bore x Stroke
89 x 64 mm
Compression Ratio
12.6:1
Cooling System
Liquid Cooled
Emissions
EURO 5+
Engine Management
Bosch EMS with RBW
Fuel Induction
Bosch fuel injection, 46 mm throttle body
Lubrication
Wet sump
Starter
Electric
Clutch
PASC slipper clutch, mechanically operated
Final Drive
Chain 520-X Ring
Primary Drive
86:33
Transmission / Drive
6 Speed
Frame Type
Steel trellis frame, powder coated, with bolt-on subframe
Suspension - Front
43mm WP APEX 43, compression and rebound adjustble, 30 clicks
Suspension - Rear
WP APEX Split Piston, preload with top ring and rebound, 20 clicks
Steering Head Angle
63.1°
Wheel Travel - Front
230 mm / 9.1 in
Wheel Travel - Rear
230 mm / 9.1 in
Brakes - Front
Single
Brakes - Rear
Single 240 mm disc, Bybre floating 1 piston caliper
ABS
Bosch 10.3 Modular with Offroad mode
Tyres - Front
90/90 x R21 M/C 54T M+S
Tyres - Rear
140/80 x R18 M/C 70T M+S
Wheels
Wire spoke, aluminium rims
Wheels - Front
21 x 1.85
Wheels - Rear
18 x 2.5
Specifications are compiled from manufacturer documentation and cross-referenced
technical sources, and corrected on an ongoing basis.
Spot an error? Let us know.
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