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Specifications
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Engine Displacement
84.9 cc
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Engine Type
1-cylinder
2-stroke engine -
Adjustability
Tool-free
suspension setup
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Before The Gate
PUMPED UP!
ADJUSTABLE SUSPENSION
Either end of the 2025 KTM 85 SX's WP XACT suspension is adjustable. Upfront, the WP XACT AER fork can be easily adjusted with the use of an air pump. This allows riders to tailor the KTM 85 SX to their specifications, weight, or track conditions. At the rear, the new WP XACT monoshock is fully adjustable for preload,
compression, and rebound.
Before The Gate
RACER, START YOUR ENGINE!
IGNITION
A new digital ignition finds its way onto the 2025 KTM 85 SX, with the new CDI box from Hidria bringing more processing power and an
all-new ignition curve. The benefits? A faster ignition process smoother engine operation, and shorter heating time in colder temperatures.
Before The Gate
LIGHT IT UP!
COMBUSTION CHAMBER
The 2025 KTM 85 SX boasts a redesigned combustion chamber with a new, smaller spark plug. This makes for more effective and efficient combustion, reducing the compression ratio generating more power and torque
Start Strong
POWERED ON
ENGINE
It took extreme levels of ingenuity to fit the race-winning formula of KTM's bigger 2-strokes into a compact 85 cc engine. The super-compact powerplant is fitted with a 6-speed transmission and delivers class-leading power and rideability throughout the entire rev range. The powervalve plays a key role in tailoring power delivery to suit track conditions and rider ability, ensuring that the only rider surprised by the incredible performance is the competition.
Start Strong
CYLINDER
The cylinder on the KTM 85 SX has a bore and stroke of 47mm and 48.95 mm respectively. It features a sophisticated power valve system, which controls both the exhaust valve and the sub exhaust ports, giving the bike excellent torque and power delivery. This translates into significant midrange performance, reducing the need to overwork the clutch in loamy or sandy conditions. An adjuster screw allows the opening time of the power valve to be adjusted to suit rider preference and track conditions.
Start Strong
CRANKCASE & ENGINE COVER
The crankcases are manufactured using a high-pressure die-cast production process, keeping wall thickness to a minimum while retaining strength and durability. The design of the cases is very compact and aims at positioning the shaft arrangements as close as possible to the center of gravity, contributing to better handling.
Start Strong
TRANSMISSION
The KTM 85 SX features a lightweight 6-speed transmission, engineered to take a beating. The gear ratios have been developed to perfectly match the characteristics of the engine, with easy and precise shifting allowing the rider to slot in the next gear quickly and confidently. The transmission also features a driveshaft that uses a screw to secure the front sprocket, and a diaphragm spring instead of a circlip, to ensure the front sprocket remains firmly in place. As with all KTM SX models, the KTM 85 SX transmission has a "no-dirt" gear shifter which, like the footpeg design, prevents dirt build-up.
Start Strong
MORE POWER
FACTORY PERFORMANCE KIT
Boost the performance of your KTM 85 SX by installing the 105 Factory Kit, ideal for tackling larger track layouts. This kit includes enhanced engine components, a cylinder head, a combustion chamber insert, a CDI control unit, and a spark plug.
Start Strong
SHIFTIN' GEARS
SHIFTING MECHANISM
Clicking into gear is made even smoother for 2025, with an update to
the shift drum. Thanks to the new coating finish, shifting up and
down the 'box is smoother, more reliable, and rock-solid even after many hours of use.
Start Strong
CLUTCH
Ultra-durable thanks to modified clutch components, the 2024 KTM 85 SX allows riders to actuate the clutch level with ease, thanks to the FORMULA hydraulic system, which conveniently ensures that play is always compensated for. This means the clutch "bite" point remains consistent throughout the ride and under all conditions.
Start Strong
CRANKSHAFT
The KTM 85 SX features a lightweight crankshaft with optimized balancing for reduced vibration and oscillating mass. As light as the crankshaft is, the rotational inertia has not been compromised, ensuring maximum torque and revs, as well as easy rideability.
Start Strong
CARBURETOR
The KTM 85 SX is fitted with a race-proven MIKUNI TMX carburetor with a 38 mm flat slide. This provides buttery smooth and controllable power all the way up to the rev limiter, while the angle of the intake manifold reduces any overflow of fuel. It's also less sensitive to different altitudes and temperatures, so you can pin it wherever, whenever.
Start Strong
COOLING
Maintaining the optimal engine temperature is crucial to ensuring consistent horsepower throughout the ride. The KTM 85 SX features radiators which are positioned for a lower center of gravity. Their design matches the shrouds perfectly and offers a great slim feel to the ergonomics. By using CFD technology (computational fluid dynamics) together with a clever cooling circuit routing, the innovative system ensures the optimum engine temperature for the highest performance, no matter what the conditions. The radiators also feature special protectors that serve not only as protection from flying rocks and debris but also as a brace that disperses energy around the radiators in the event of an impact.
Start Strong
MORE BRAAAAP!
EXHAUST
The exhaust system has been designed to perfectly match the engine's power characteristics and contributes to the outstanding all-round performance and rideability. The header pipe is produced using a 3-dimensional stamping process. Once the components have been shaped, they are robot welded to ensure the highest level of quality, consistency and durability. The lightweight and compact silencer guarantees that sweet 2-stroke sound and falling safely within the noise limits for racing.
Calm Under Fire
FLUID RIDER MOTION
ERGONOMICS
Meet the 2025 KTM 85 SX in a dark alley, and you'd be forgiven for thinking it was one of its bigger brother. With a carefully scaled-down design that mimics that of the full-sized KTM SX range, this little weapon has unparalleled aesthetic appeal. What's more, it also provides young riders with an exceptional riding experience and sensation, getting them ready to step up to the big leagues.
Calm Under Fire
FULLY FUELED
TANK
Holding approximately 5.2 liters of pre-mixed fury, the tank is perfectly shaped to be small and slim to allow for easy and uninhibited rider movement, while still providing enough range to cover a full race at full throttle.
Calm Under Fire
HANDLEBAR
Hang on tight - the KTM 85 SX features a strong, lightweight, tapered aluminum handlebar, with a specifically shaped bend to suit its overall ergonomics. Additionally, the bike comes standard with ODI lock-on grips, which include a vulcanized grip on the right side and a lock-on grip on the left that do not require glue or wire for mounting.
Calm Under Fire
SEAT
Providing the perfect blend of grip, durability and comfort, the 2024 KTM 85 SX seat does everything you'd expect it to, while showing off it's its undeniable READY TO RACE and 'orange' heritage.
Calm Under Fire
IN TOUCH WITH THE RIDER
PEGS AND BARS
The KTM 85 SX has "no-dirt" footpegs, which have a simple but effective self-cleaning system that ensures the footpegs return to their original position, providing complete control in all conditions.
Hit The Big Stuff
GRAPHICS
Rocking an all-new white and orange color plastics combination and orange seat cover - not to mention bold, black, orange and purple graphics - the 2024 KTM 85 SX lines up behind the gate with pure race-winning intent.
Hit The Big Stuff
BRINGING THE BACKBONE
FRAME
The frame on the KTM 85 SX is a scaled-down version of the multi-championship-winning full-size frames. Made from hydroformed chromium-molybdenum steel tubes that are robot welded, the frame is pin-point accurate, ensuring the highest levels of consistent quality and flex characteristics.
Hit The Big Stuff
RIGID REINFORCEMENT
SUBFRAME
Not only does this lightweight aluminum subframe provide rear fender stability and strong support, it also adds to the overall rigidity and handling of the KTM 85 SX.
Hit The Big Stuff
SWINGARM
The one-piece swingarm is manufactured using a gravity die-cast production process for exceptional strength at the lowest possible weight. It offers a wide range of adjustment for the rear wheel, allowing for a shorter wheelbase on tighter, twisty tracks, or a longer wheelbase for greater stability on longer, more choppy tracks. The swingarm's chain measurement markings are visible from above, making adjustment simpler and more accurate.
Hit The Big Stuff
WHEELS
The 2024 KTM 85 SX features a 'big wheel' Excel rim combo powdercoated in black, with a 19-inch front wheel and a 16-inch rear. These are mounted on CNC-machined hubs and wrapped in new MAXXIS MX-ST tires which deliver exceptional straight-line stability and excellent traction when chasing the holeshot.
Hit The Big Stuff
BRAKES
Bringing this little screamer to a stop is down to the Formula brake system with radial calipers - four pistons in front, two in the rear - with lightweight Wave brake discs. The system is the benchmark in terms of controlled action and braking performance, ensuring powerful and confident braking.
Hit The Big Stuff
UNFLAPPABLE FRONT END
WP XACT FORK
The KTM 85 SX front fork features the same suspension technology found in the full-size motocross range. The WP XACT fork with AER technology consists of a split fork design with a capsuled air spring in the left leg and the trusted oil damping system in the right leg. The preload adjustment is extremely simple and can be adjusted by using the single air pressure valve and supplied air pump. The design also allows for easy access to compression and rebound clickers.
Hit The Big Stuff
TRACK SMOOTHER
WP XACT FORK
The KTM 85 SX boasts a WP XACT rear shock absorber with sophisticated PDS (Progressive Damping System). This design offers a high progression rate and an excellent response to uneven terrain - just like the bigger bikes. It also allows an impressive 305 mm of rear-wheel travel and is fully adjustable for preload, compression, and rebound.
Maintaining Momentum
PRECISE, LAP AFTER LAP
RADIATORS
The 2025 KTM 85 SX features new state-of-the-art radiators produced by Pankl, inspired by the full-size SX concept. These feature the same design, albeit shortened to fit the 85cc needs and size, and work to ensure the engine is running at optimal temperatures when being ripped around the track, lap after lap.
Maintaining Momentum
BREATH IN DEEP
AIRBOX AND FILTER
The KTM 85 SX airbox is a masterclass in design, optimizing the tiny space available to deliver the best possible performance, while still maintaining the highest level of filter protection. The air filter is easily accessed, without tools, by removing the left side panel. The Twin Air filter and filter cage design feature a simple, secure mounting system, making filter maintenance quick and easy, which means less time in the pits, and more time winning races.
KTM 85 SX PRICE
Engine: 1-cylinder, 2-stroke engine
Max Power: 11.6 kW (16.4 PS) @ 11500 rpm
Max Torque: 14 Nm @ 8500 rpm
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Frequently Asked Questions
What are the colours options available for KTM 85 SX?
Orange
What is the max power of KTM 85 SX?
11.6 kW (16.4 PS) @ 11500 rpm
What is fuel tank capacity of KTM 85 SX?
7.2 L
What is the Ex-showroom price of KTM 85 SX?
Ex-showroom Price for KTM 85 SX is ₹ 6 69 000/-*
What is the engine capacity of KTM 85 SX and power figures?
KTM 85 SX is powered by 84.9 cc engine generating 11.6 kW (16.4 PS) @ 11500 rpm
What is the torque figure of KTM 85 SX?
KTM 85 SX generates 14 Nm Torque @ 8500 rpm
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KTM 85 SX
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Travel
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