Menus
- What you must remember
- Themore
- Theless
- Prices
- Make your2017 KTM 125 SX
- Opinion
- Replaces
- The technical aspect
- Competitors
- Gallery
- Related articles
The 125 SX has displayed insolent health on the market for many years. And in KTM’s opinion, it has a bright future ahead of it. It must be said that she was particularly well cared for: they watched her line and eliminated the slightest superfluous gram.. The 2-stroke engine and chassis also received a lot of attention. His tone will wreak havoc.
MOTOR
The latest 125 SX engine asserts itself as the most powerful and competitive engine in its class and demonstrates that 2-stroke technology has a bright future, thanks to its excellent power-to-weight ratio and low cost. and its simplicity. This 125 cc engine, the result of KTM’s technical expertise, incorporates the latest technological innovations on the market. Despite a compact structure and a weight of just 17.2 kg, it delivers great power over the entire rev range. The driver has all the assets in hand to set the best lap times.
CYLINDER
This ultra-compact cylinder, with a bore of 54 mm, features state-of-the-art exhaust control and a sophisticated mechanism for the side carrier exhaust channels. Combined with the two-piece cylinder head, this design is the source of a marked increase in power throughout the range. The arrangement of the water jackets inside the cylinder and the cylinder head allows efficient heat dissipation under heavy load on the engine.
CRANKCASE
For the latest generation of engines, KTM engineers have designed ultra-light molded crankcases. They also raised the position of the crankshaft in order to bring it closer to the center of gravity, so as to better centralize the masses and enhance driving pleasure. Despite its extremely compact shape, the motor can accommodate an optional electric starter.
CARBURETOR
From MY 2017, all KTM 2-stroke models will be fitted with the new MIKUNI TMX carburetor instead of the usual Keihin carburetor. This 38 mm flat-valve carburetor allows a clear improvement and a better dosage of power over the entire range of use. It is also less sensitive to changes in altitude and variations in temperature..
GEARBOX
Another interesting innovation planned especially for the 2-stroke engine: a robust gearbox offering 6 ratios perfectly adapted to the range of use of the 125. The lightening and the narrowing of the engine were made possible thanks to the use of state-of-the-art production technologies. As safety is also an essential parameter, the selector adopts a new “zero dirt” design which prevents blocking of the lever joint by soiling. Because even lovers of soft ground take a dim view of mud when it gets lodged in the wrong places..
EXHAUST
Attention has been paid to the combustion chamber to deliver even more power and torque. This engine is a marvel of explosiveness and solidity.
87.2 kg
The main objective of the KTM engineers during the development of the new generation SX was very significant weight reduction and improved handling. The result is clear: the current SX models are among the lightest and slimmest motorcycles in the competition..
FRAMEWORK
The high-tech chrome-molybdenum steel frame, a model of lightness, flexibility and maneuverability, offers excellent stability and proves devilishly precise in turns. Thanks to its high torsional rigidity and low longitudinal rigidity, this frame allows better absorption of the energy generated by the front and rear suspensions when jumping or crossing a bump. Driving is more comfortable and less taxing. The mounting brackets that ensure the connection between the cylinder head and the frame are still just as light. Mounted laterally, they also help to limit the level of vibration and to refine the trajectory of the motorcycle in the bends. Engineers can be proud of their work because the frame is now a kilo lighter than the lightest competitive frame available on the market today. Everything has also been done to facilitate maintenance and free up space for the tank and other components. The ultra-light rear part of the frame, made of stable aluminum profiles, weighs less than 900 grams on the scale.
FOOTREST
Sophisticated ‘zero dirt’ footrests prevent gear selector clogging even when driving through deep ruts.
AIR FILTER BOX
The air filter housing reinforces the protection of the air filter against contamination and guarantees optimum air flow. The cage in which the extra-large Twin Air air filter is housed is completely rigid, which helps to better hold the system in place. The design is so simple that one could replace the filter even with the face covered in mud. And this without the help of any tool. And in a matter of seconds.
SWINGING ARM
In addition to a significant saving in weight, cast aluminum has an ideal bending behavior. The one-piece molding process eliminates the imperfections inherent in welding and guarantees a more consistent build quality, but also more careful.
PETROL TANK
The ultra-light polyethylene tank has a capacity of 7 liters. Tank cap with internal thread ensures easy and reliable closing.
HANDLEBAR
When it comes to the handlebars, KTM engineers have always known which direction to go. Profiled and made of high resistance aluminum, this NEKEN handlebar is no exception to the rule. It is equipped with rubber silent-blocks and can be adjusted to two positions. From MY 2017, the handlebars are fixed by means of two clamps (lower part) and a new trigger guard (upper part) which improves torsional rigidity. Replacing the handlebars is also easier if it should bend from a bad fall. Right: an ODI vulcanized grip; on the left: the ODI lock-on handle as comfortable as it is practical, thanks to its mounting system without glue or wire.
SADDLE
Tailor-made to provide a comfortable support surface, this saddle is as resistant as it is comfortable. Pampered, the riders will benefit from a new saddle cover on the AM 2017 intended to reinforce the grip and the feeling..
SYSTÈCOOLING ME
KTM’s proven integrated cooling system circulates the coolant from the cylinder head through the frame triangle to the aluminum radiators supplied by WP. Its incredible efficiency is due to the better management of the internal air flow and to the progress made in ventilation thanks to CFD calculations (numerical simulation of fluid mechanics). Well thought out, the radiator guards integrated into the front part of the spoilers are particularly useful in the event of an impact. Every detail counts for KTM.
WHEELS
Featuring ultralight CNC machined hubs and premium Excel rims, the wheels guarantee maximum stability despite limited unsprung weight. They are fitted with the latest generation Dunlop Geomax MX 3S tires.
FORK
Another interesting novelty on this bike is the WP AER 48 inverted fork with air spring and separate damping circuits, developed by WP in close collaboration with KTM. Damping functions are on the right, the air spring is on the left. The left fork leg has a dual chamber and air cartridge system to prevent pressure loss. Should the outer seal ever leak, the pressure exerted inside the inner cartridge will hold the motorcycle in position. The air spring is easily adjusted according to the weight of the pilot using a single valve. No special tools are required – the standard pump will do. The right fork leg incorporates a cartridge specially designed to adapt to the type of damping sought. Just turn the dial 30 stops to the desired position (compression up and rebound down) to choose the appropriate setting based on track conditions and rider preferences. For the AM 2017, it is also important to point out that the outer tubes of the AER 48 fork have been redesigned to optimize the bending characteristics, provide more flexibility and limit the frictional forces. They also lost 265g, which is far from insignificant. More comfortable and more sensitive than ever, these forks beg to be put to the test.
FORK TEE
High quality CNC machined triple trees have been a hallmark of KTM for years. Allowing precise steering, they significantly enhance the flexibility characteristics and, thus, the action of the fork. For the AM 2017, the design of the upper triple clamp has been revised and corrected according to the new divers. The handlebars are fitted with rubber silent-blocks by means of two clamps (lower part) and a new trigger guard (upper part) which improves torsional rigidity. Replacing the handlebars is also easier, for example in the event of a fall. An hour meter, installed on the upper triple clamp, indicates when it’s time to perform maintenance or refuel.
SHOCK ABSORBER
The WP shock absorber has been developed taking into account the new architecture of the frame and the swingarm, just like the link system and the WP AER 48 front fork. With its various machined and black anodized components, this ultra-sophisticated shock absorber makes strong impression compared to competing products less well finished. It benefits from a new adjustment and a more flexible spring which go hand in hand with the new setting of the front axle..
BRAKES
More responsive, more efficient and more powerful than ever, Brembo brakes will tackle any situation. These small technological gems are associated with Wave discs from Galfer, renowned for their lightness. For AM 2017 the rear brake pedal has been lengthened by 10mm and the new brake pads are now less aggressive.
FAIRING
The KTM factory riders collaborated on the design of the bike with the KTM R&D specialists and the Kiska design agency, with a single watchword: to create a perfect harmony between the rider and the machine. The ergonomics and the contact points for the pilot have been particularly taken care of for maximum freedom of movement. The lowered saddle offers superior comfort, especially in the rear shell. The special shape of the front and rear mudguards is a perfect example of intelligent design: thanks to a well-thought-out structure and assembly, these mudguards guarantee maximum stability, while being lighter. Better yet: they stay clean longer.
What you must remember
Themore
Theless
Prices
7,500 €
Price
nine
Compare
the credits
Make
your2017 KTM 125 SX
Estimate, calculate and compare the cost of insuring your motorcycle.
Calculate the cost of
insurance
Test the price of the motorcycle insurance specialist
Opinion
on 5 opinion
users
Read the reviews
Replaces
125 SX 2016
Model marketed in
2012
2013
2014
2015
2016
2017
2018
2019
2020
The technical aspect
2017 KTM 125 SX
- Frame
- Frame: Central tubular steel frame
- Tank: 7 liters
- Seat height: 960 mm
- Wheelbase: 1,485 mm
- Dry weight: 87 kg
- Train before
- WP inverted telehydraulic fork Ø 48 mm, deb: 310 mm
- 1 disc Ø 260 mm, 2 piston caliper
- Front wheel:
80/100
– 21
- Transmission
- 6-speed gearbox
- secondary by chain
- Rear axle
- WP mono-shock, deb: 300 mm
- 1 disc Ø 220 mm, 1 piston caliper
- Rear wheel:
100/90
– 19
- Motor
- Single cylinder
in line
, 4 stroke - Cooling: by water
- Carburetor Ø 38 mm
-
124.80 cc
(54 x 54.5 mm) -
≈ 40
ch - Weight ratio /
power
: 2.18
kg / hp - Crit’air:
Detached pieces
exhaust
motor
fluid
electricity
filtration
braking
chain kit
Competitors
Gallery
Related articles
-
In the world of motocross, the new KTM 250 SX boasts one of the best power-to-weight ratios in its class. Sure of its strength, it is even ready to do…
-
Honda went all out to redesign its CRF 450 R. A lot of work, the most important for 8 years, to make it a real combat machine. An engine derived from…
-
Thanks to its compact motor, which provides explosive but controllable power, it is the weapon of choice for the official Red Bull KTM factory team and…
-
The KTM 250 SX-F has dominated the MX2 world championship for several years, and has just added a second AMA Supercross Lites title to its impressive…
-
Since 2016, the CRF 250 R has claimed a substantial gain in power at high revs thanks to the adoption of a new cylinder head, a new connecting rod and a…
-
2017 Harley-Davidson 1746 ULTRA LIMITED FLHTK
It is the border before the CVO tourer, after the desire to travel the countries, between the road and the time. Ultra Limited does not take half…
-
For 2017, the KTM ADVENTURE 1050 becomes 1090. And if his surname could announce a gain in displacement, it is not and it is still the 1050cc V-twin…
-
Harley-Davidson XL 1200 X SPORTSTER Forty Eight 2017
The Sportster Forty-Eight is all about a little rascal. Shady, stocky, stripped down, the machine only asks to jostle but not necessarily to be jostled….
-
Trail, GT or urban, is designed in V-Strom at Suzuki. Under this name live two machines with very good performance, striking design and reference…
-
Once the appetite for two-wheelers has been whetted with the 125, the 390 Duke is there to transform the test and introduce the biker to the joys of an…