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You are here: TMW -- 2017 Motorcycle Models -- KTM -- 2017 KTM 250 SX-F Review

2017 KTM 250 SX-F Review
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2017 KTM 250 SX-F
2017 KTM 250 SX-F

2017 KTM 250 SX-F
2017 KTM 250 SX-F

2017 KTM 250 SX-F
2017 KTM 250 SX-F



2017 KTM 250 SX-F Review

2017 KTM 250 SX-F on www.Totalmotorcycle.com

Small Bore Superstar...

The 250 SX-F has been on top of the MX2 World Championship for many years now and added a second AMA Supercross Lites Championship to its crowded trophy cabinet. But that’s no surprise. The successful combination of a powerful and torquey engine in a lightweight and agile chassis is bound to place the 250 SX-F onto podium after podium.

 



2017 KTM 250 SX-F www.Totalmotorcycle.com Key Features

UPGRADE: KTM SX MODELS MODEL YEAR 2017 ARRIVING IN DEALERS SOON!

After last year’s new generation of SX machine was launched with revolutionary WP AER 48 forks, a new chassis, plus new engines over previous models (except 250 SX), the KTM R&D departments in Austria and the USA have been making further improvements for 2017, and updated the 250 SX model to the latest specification of chassis with a brand new engine.

With input from the KTM Motorsports department being influential to serial production, especially in the USA where the factory team must race homologated machines and we can note that Ryan Dungey has just won back-to-back 450 Supercross World Championship titles aboard a KTM 450 SX-F, the SX model line-up is better than ever.

With typical KTM characteristics including a precisely designed, high-tech lightweight chrome-moly steel frame, high-tech Brembo brakes, lightweight CNC machined hubs with high-end Excel rims, Dunlop Geomax MX 3S tires, No-Dirt footpegs, an intelligent air filter box system, precisely designed bodywork, the all important starter (except 125 SX) and much, much more already fitted to these machines, KTM has once again reached new heights with the latest model range. For 2017 there are a number of refinements over last year including traction control for 4-stroke models, which is part of the new multifunctional handlebar map switch, new suspension components and settings, new graphics and other exciting details.

New for 2017 is:
• All new 250 SX model
• New multi-functional handlebar map switch so the rider can activate the new traction control and launch control, while choosing an alternate mapping of the engine management system
• Re-designed upper triple clamp for enhanced fork action
• New shock absorber setting for increased rider confidence
• Air pump supplied as standard for the AER 48 fork system
• Hourmeter to help keep up with precise maintenance
• Re-designed outer tubes on AER 48 forks for enhanced flex characteristics for reduced stiction and less friction, as well as a weight reduction of 265 g
• New graphics
• New seat cover that provides a better feel and grip for the rider
• New resonator system for 450 SX-F with flow design header plus a new 250 SX exhaust system
• New aluminum cylinder head stays on the engine mounts for 4-stroke SX models

Joachim Sauer (KTM Offroad Product Manager): “Last year was a new generation of SX, but we’ve been back through every component of each motorcycle in this range and as always we’re looking how we can do things better. There are some significant changes in the SX MY2017 line-up to benefit the rider both on and off the bike, as well as a brand new 250 SX! Obviously we have a lot of input from Motorsports, which is especially key to these steps forward and it’s great we can boast another FIM Supercross World Championship title in the hands of Ryan Dungey. The appetite for improvement never stops in our R&D department and we feel that riders will certainly benefit from the refinements made for 2017.”


 

2017 KTM 250 SX-F www.Totalmotorcycle.com Features and Benefits

BORN FOR THIS


98.2 kg
The main target for the KTM engineers when developing the SX models was a massive weight reduction compared to the previous generation. The result: the current SX-F models are the slimmest, lightest bikes on the track. Even though the 4-strokes are equipped with an electric starter as a standard feature, while the competition still needs to be kick started, the SX-F line weigh in pounds less. Rather than kicking to start - you can focus on kicking ass.


FRAME
The high-tech, lightweight chrome-moly steel frame is engineered for excellent handling, precise cornering and supreme stability. You can also count on high torsional rigidity and low longitudinal stiffness for better absorption of the energy created by the front and rear suspension sucking up jumps and bumps. In short: more comfort and less rider fatigue. Laterally attached, lightweight engine head stays contribute to a reduced vibration level. Two threaded inserts in the lower cradle tubes allow for an optional skid plate. The engineers were able to pull off all that, while making the frame two pounds lighter than that of the lightest competitor on the market. In addition, the frame is easier to maintain, easier to work on and supplies more space for the tank and other components. The bike also features an extra-light aluminum subframe, which weighs in at less than 2 pounds.


FOOTPEGS
Sophisticated ´No Dirt´ footpegs prevent clogging of the footpeg pivot, even when digging in deep ruts. Looking for a higher riding position? Then just mount the footpegs of the MY2017 EXC models, which are 6mm higher than the SX versions.


AIRBOX
The airbox design offers maximum protection of the air filter while ensuring maximum airflow. The large twin-air filter is mounted in a stiff cage, which at the same time holds the system in place. This design is so simple you could still pop a fresh one in with a face full of mud. Without tools. In seconds.


EXHAUST
Noise limits are a real challenge for every manufacturer. Therefore, KTM has put a lot of effort into the development of its exhaust systems. All 4-strokes are fitted with header pipes that have a unique standard feature; an additional resonator system – a small chamber connected to the pipe. All 4-strokes are fitted with a short silencer, mounted as close to the engine as possible for mass centralization and better rideability. Its advanced internal design reduces the noise sufficiently in order to sit safely below noise limits while still raising the hairs on your neck.


HANDLEBAR
KTM engineers sure know how to handle handlebars. This tapered one, made of high-strength aluminum by NEKEN, is fixed in damped rubber mounts and has two different positions. From 2017 onwards, the lower handlebar clamps are separated, while on the upper side a new bridge-type clamp guarantees more torsional stiffness. It’s also easier to replace the bar in case it gets twisted in a nasty crash. ODI lock-on grips make grip changes easy which does not require any wire or glue to be secured.


SWINGARM
The cast aluminum design offers low weight and a perfect flex behavior. The single-component casting process eliminates any inconsistencies and inherent weak points created by welding. It’s better looking as well.


FUEL TANK
A lightweight polyethylene tank has a capacity of 1.85 gallons. The filler cap has an inside thread, which makes for easy and reliable closure.


WHEELS
The KTM wheels feature lightweight, CNC machined hubs and high-end Excel rims guaranteeing maximum stability at minimum weight. The wheels are fitted with the latest Dunlop Geomax MX 3S tires. This set is now wider at the rear (110/90-19 instead of 100/90-19) and the bike gets an optimized gearing (14/51 instead of 13/50).


SEAT
Tailored to meet the needs of the world’s fastest racers, this durable seat offers great comfort. For 2017, a new cover gives its riders even more grip with better feel.

 

 

CLEAN-CUT


BODYWORK
KTM R&D, Kiska Design and the factory racers had their say in shaping the plastics with one goal: complete harmony between rider and bike. Perfect ergonomics and contact points provide maximum comfort in movement on the SX-F. The I-beam structures of the front and rear fenders guarantee maximum stability and a low weight thanks to well thought-out construction and mounting. They also stay cleaner for longer.


GRAPHICS
New graphics convey the READY TO RACE character of the 2017 SX-F model line.

 

 

ELECTRIFYING


HANDLEBAR MAP SWITCH
All 4-stroke models are equipped with a sophisticated new multi-functional handlebar map switch, which does three things:· Activation of the traction control· Activation of the launch control· Selection of an alternative power curve (Standard or Advanced),The traction control is a unique feature that none of the competitors can offer. It guarantees more efficient traction when the track conditions are less than perfect. Push the button and reign supreme. With this map switch the rider can also activate the launch control, which provides more efficient starts out of the gate so you can go for the holeshot, time and time again. How? It simply reduces the maximum engine speed for the very first moment of the start, in order to give you better control. Push both buttons when the engine idles and the EFI control lamp mounted on the upper triple clamps will let you know you are READY TO RACE. In addition, the map switch gives the rider the chance to select an alternative, more powerful map beside the standard configuration. Welcome to the future of motocross.


BATTERY & WIRING HARNESS
All SX-F engines are fitted with the proven electric starter – a unique KTM feature and a major benefit at all levels of motocross racing. A super compact and lightweight one-pound Lithium-Ion starter battery breathes life into the engine and contributes to low vehicle weight. The battery and wiring harness are centralized in a compartment above the airbox, allowing the mechanic to remove the subframe without with the electrics. A happy mechanic is a good mechanic.


ELECTRIC STARTER
Like all KTM 4-stroke motorcycles, the 450 SX-F is started at the push of a button - a priceless advantage when you’re on the clock.

 

 

ROCK STEADY


MONOSHOCK
The WP monoshock has been developed with the entire frame and swingarm architecture in mind, including the linkage system and the WP AER 48 front forks. It features machined and black anodized components and is a valuable, high-end product compared to roughcast reservoirs. A new setting and a softer spring perfectly match the reworked front-end set-up and its sparkling WP color scheme lets everyone know you have excellent taste in suspension.


FORKS
The lightweight WP AER 48 front fork, a 48mm USD air-sprung fork developed by WP in close collaboration with KTM, is a split fork with separate functions for each leg. That means damping functions are on the right side, whereas the air spring is in the left. This left leg features a two-chamber system with a capsuled air cartridge to prevent loss of air pressure. The air spring is easy to adjust to any rider weight via a single air valve. No special tools are required; just the air pump provided with the bike. The right fork leg integrates a damping cartridge that tailors to all your damping needs. It can be adjusted to the track conditions and the rider’s preferences with a twist of a dial (compression from the top, rebound from the bottom, 30 clicks each). For 2017, the AER 48 also features redesigned outer tubes with better flex characteristics, smoother operation and less friction. And they are 3 pounds lighter than the 4CS units they replace. Right off the dealer floor, these forks are more comfortable and more sensitive than ever. But you can still hammer the hell out of them.


TRIPLE CLAMP
Top quality, CNC machined triple clamps have been a KTM trademark for years to ensure precise handling. For 2017, the upper triple clamp specifically features a redesign in conjunction with the new fork tubes. The rubber damped handlebar mount has also been reworked and the lower handlebar clamps are now separated, while on the upper side a new bridge-type clamp guarantees more torsional stiffness and can easily be replaced in case it gets twisted due to a crash. In addition, an hour meter is fitted at the upper triple clamp in order to let the rider know it’s time for a service.


BRAKES
You can’t brake any harder, better, faster or stronger. These high-tech Brembo babies are combined with lightweight wave discs made by Galfer. For 2017, the rear brake features a 10mm longer brake pedal and you get new, less aggressive brake pads all round.

 

 

SCREAMER


ENGINE
The 250 SX-F engine is known to be the strongest engine in the 250 class. It screams at the top of its lungs at 14,000rpm, but is equally happy producing tons of torque and power across the rest of the rev range. Its compact architecture contributes to an excellent mass centralization, supporting the rideability of the bike. And it only weighs 57.5 pounds. That’s including the incredibly beneficial electric starter.


CYLINDER HEAD
The centerpiece of the compact DOHC engine is the cutting-edge cylinder head. It features two overhead camshafts, which activate the titanium valves via super-light finger followers with a hard DLC coating. New lateral brackets (now made of aluminum instead of steel) allow an efficient fixation of the engine to the frame and shave off even more weight.


CRANKSHAFT
The 250 SX-F has an extremely rigid crankshaft, which features a connecting rod with a plain big end bearing with two force-fitted bearing shells running directly on the crank pin. This design is a major prerequisite for the extremely high engine speed levels and the unrivaled maximum power of the 250cc engine. Not only that, it enhances the engine’s durability, allowing long crankshaft service intervals, which is a huge customer benefit in relation to time, effort and cost.


ELECTRIC STARTER
The 250 SX-F is fitted with an electric starter as standard, which is a clear advantage when it comes to crunch time in the heat of battle. A strong starter motor made by Mitsuba and the proven starter drive will fire time and time again at the push of a button.


ENGINE CASES AND COVERS
The design of the die-cast engine cases allows for minimal weight and a very centralized shaft configuration. This makes the engine short and compact, while contributing to an efficient centralization of masses. The engine covers also feature a solid surface structure, which reduces the wear caused by the rider’s boots. This way, your SX-F will keep looking better longer.


TRANSMISSION
The reliable 5-speed gearbox features a special surface treatment on the 2nd, 3rd and 4th gears for solid reliability. The advanced ´No Dirt´ gear lever design prevents dirt from jamming the joint of the lever and guarantees precise shifting even in the muddiest conditions. All 4-stroke SX-F engines are fitted with a gear sensor for tailored engine mapping for each gear.


ENGINE MANAGEMENT SYSTEM
The state-of-the-art Keihin Engine Management System with electronic fuel injection features a 44mm throttle body. Thanks to its unique injector position, the engine’s response is instantaneous. And to make life even easier, separate systems for cold starts and idle adjustment await you. The lightweight ECU features a unique traction and launch control system for lightning-quick response when the gate drops and maximum grip thanks to different maps that sync with to the gear you’re in. It’s also possible to unleash an even more powerful mapping via the handlebar map switch.


CYLINDER AND PISTON
Inside the short cylinder, with a bore of 78mm, thumps a box-type piston made by CP. Its crown geometry is adapted perfectly to the high-compression combustion chamber (14:1), where its rigid structure and low weight shine. Thanks to the low oscillating masses, the engine is snappy as it is strong.


COUNTER BALANCER SHAFT
The side-mounted counter balancer does double duty also driving the water pump. Thanks to its perfect balance and low oscillating masses, engine vibration is kept to a minimum.


CLUTCH
The highly compact CSS clutch (coil spring steel) features a wear-free steel basket fitted with seven clutch plates, which are extremely heat resistant due to their steel carrier discs. The Brembo hydraulic system provides easy and precise modulation.


COOLING SYSTEM
KTM’s proven cooling system routes the coolant from the cylinder head through the frame triangle, directly to aluminum radiators made by WP. A new filler cap system and are stiffer alloy construction increase the durability and reliability of the cooling system. Due to flow optimized internal circulation and CFD-calculated air ventilation, the system is superbly efficient. In addition, well thought-out radiator guards integrated in the front part of the shrouds provide protection in a crash.

 



 

2017 KTM 250 SX-F - www.Totalmotorcycle.com USA Specifications/Technical Details
US MSRP Price: $ See Dealer for Pricing in USD

Engine

Design

1-cylinder, 4-stroke engine

Displacement

249.9 cm³

Bore

78 mm

Stroke

52.3 mm

Starter

Electric starter

Transmission

5-speed

Primary drive

24:73

Secondary gear ratio

14:51

Clutch

Wet, CSS multi-disc clutch, Brembo hydraulics

EMS

Keihin EMS

Chassis

Frame design

25CrMo4 steel central-tube frame

Front suspension

WP-USD, AER 48, Ø 48 mm

Rear suspension

WP shock absorber with linkage

Suspension travel (front)

310 mm

Suspension travel (rear)

300 mm

Front brake

Disc brake

Rear brake

Disc brake

Front brake disc diameter

260 mm

Rear brake disc diameter

220 mm

Chain

5/8 x 1/4"

Steering head angle

63.9 °

Wheelbase

1485 ± 10 mm

Ground clearance

370 mm

Seat height

960 mm

Tank capacity (approx.)

7 l

Weight READY TO RACE (without fuel)

98.2 kg




 


 

2017 KTM 250 SX-F - www.Totalmotorcycle.com Canadian Specifications/Technical Details
Canada MSRP Price: $ See Dealer for Pricing in CDN

Engine

Design

1-cylinder, 4-stroke engine

Displacement

249.9 cm³

Bore

78 mm

Stroke

52.3 mm

Starter

Electric starter

Transmission

5-speed

Primary drive

24:73

Secondary gear ratio

14:51

Clutch

Wet, CSS multi-disc clutch, Brembo hydraulics

EMS

Keihin EMS

Chassis

Frame design

25CrMo4 steel central-tube frame

Front suspension

WP-USD, AER 48, Ø 48 mm

Rear suspension

WP shock absorber with linkage

Suspension travel (front)

310 mm

Suspension travel (rear)

300 mm

Front brake

Disc brake

Rear brake

Disc brake

Front brake disc diameter

260 mm

Rear brake disc diameter

220 mm

Chain

5/8 x 1/4"

Steering head angle

63.9 °

Wheelbase

1485 ± 10 mm

Ground clearance

370 mm

Seat height

960 mm

Tank capacity (approx.)

7 l

Weight READY TO RACE (without fuel)

98.2 kg





 

2017 KTM 250 SX-F - www.Totalmotorcycle.com European Specifications/Technical Details
Europe/UK MSRP Price: £6949 GBP (On The Road inc 20% Vat)

Engine

Design

1-cylinder, 4-stroke engine

Displacement

249.9 cm³

Bore

78 mm

Stroke

52.3 mm

Starter

Electric starter

Transmission

5-speed

Primary drive

24:73

Secondary gear ratio

14:51

Clutch

Wet, CSS multi-disc clutch, Brembo hydraulics

EMS

Keihin EMS

Chassis

Frame design

25CrMo4 steel central-tube frame

Front suspension

WP-USD, AER 48, Ø 48 mm

Rear suspension

WP shock absorber with linkage

Suspension travel (front)

310 mm

Suspension travel (rear)

300 mm

Front brake

Disc brake

Rear brake

Disc brake

Front brake disc diameter

260 mm

Rear brake disc diameter

220 mm

Chain

5/8 x 1/4"

Steering head angle

63.9 °

Wheelbase

1485 ± 10 mm

Ground clearance

370 mm

Seat height

960 mm

Tank capacity (approx.)

7 l

Weight READY TO RACE (without fuel)

98.2 kg

The illustrated vehicles may vary in selected details from the production models and some illustrations feature optional equipment available at additional cost.
All information concerning the scope of supply, appearance, services, dimensions and weights is non-binding and specified with the proviso that mistakes, printing, setting and typing errors may occur; such information is subject to change without notice.



Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).