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The KTM 125 SX is a successful and proven model maintaining a pioneering position in the market for many years. For the 2016 model year, it looks even better. Featuring an entirely new and lighter high-performance two-stroke engine, exhaust valve and 6-speed gearbox mounted on a new state-of-the-art chassis, the 125 SX remains a favorite model. young champions. Once again, this lower capacity 2-stroke machine is destined to set a new benchmark in the 125cc class..
Motor
The new 125cc engine developed for the 2016 model year features an entirely new architecture using the latest KTM technical know-how and the most advanced technology in its class. The result is improved power across the rev range, 2kg less weight (17.2kg) than its predecessor, and a much more compact size. For the rider, this improved handling and performance translates into a faster lap time..
Cylinder
At the heart of the new engine is a new cylinder with a bore of 54mm. In addition to reworked orifices, it features a new exhaust valve and a sophisticated mechanism for the side support exhaust channels. Combined with the new two-piece cylinder head, this design results in a marked increase in power across the range. Despite a weight reduction of 360 g compared to the previous model, the new arrangement of the water jackets inside the cylinder and the cylinder head allows better heat dissipation, an important feature under heavy engine load..
Molded engine case
For the latest generation of engines, KTM engineers have designed new molded crankcases where the position of the clutch shaft and crankshaft has been raised by 27 and 37 mm respectively, resulting in better mass centralization and thus better maneuverability. The engine is also much more compact, which contributes significantly to the weight reduction (600 g less).
Piston
The new piston of the 125 SX is optimized for maximum reliability, and its shape has been modified to perfectly match the new cylinder layout..
New crankshaft
The new crankshaft has the same 54.5mm stroke as the previous model, but features optimized balance to reduce vibration and a weight saving of 50g.
Exhaust
For the new model, KTM engineers have developed a new exhaust pipe specially designed to maximize the power output of the engine..
Clutch
The new engine has a new hydraulic clutch mechanism made by Brembo instead of Magura. It ensures easy engagement and defined modulation.
Gearbox
The new 6-speed gearbox offers the same ratios as the previous model, but the latest production techniques have reduced the width by 6mm and the weight by 200g. The “zero dirt” design of the gear lever prevents dirt from blocking the lever joint, ensuring safe operation of the gearbox.
Fork
The new KTM SX models feature a revolutionary new ultra-light WP fork, a 48mm inverted air spring fork developed by WP Suspension in close collaboration with KTM. This is a split fork with separate functions for each fork leg. Damping functions are on the right, the air spring is on the left. The left fork leg houses an air cartridge. The air spring is easily adjusted for the weight of the rider using a single valve and standard fork air pump. The right fork leg features a new cartridge specifically designed to meet the demands of the single damping arm design, and the damping can be adjusted to suit track conditions or rider preference with a simple twist. button. With approximately 300mm of travel, the new fork offers exceptional response and excellent, consistent damping characteristics. It also achieves a weight saving of 1.4 kg compared to the previous model.
Triple tree
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 2016, the upper triple clamp features a new handlebar clamp rubber damping system to reduce the level of handlebar vibration. Triple trees maintain front-to-rear adjustability to rider preference.
Mono-shock absorber
The new generation of mono-shocks manufactured by WP Suspension have been designed for the new SX models, together with the new frame and swingarm architecture, the modified linkage and the new WP fork. The linkage system has also been reworked, with modified geometry and extended pull rods, and was tested last season on most KTM factory bikes..
Lightening
The main objective of the KTM engineers during the development of the new generation SX was very significant weight reduction and improved handling. With a weight reduction of between 4 and 5 kg, the result is exceptional, making the new KTM models the lightest motorcycles on the market, and this although the four-stroke models are equipped as standard with a very beneficial electric starter, while competing models must be kicked off.
Air box
The new design of the air box provides optimum protection of the air filter against clogging and maximum air flow. The new intake snorkels feature a weight saving of 300g and are made of a new material (reducing deformation due to air intake impulses) improving performance. As on previous models, the new dual air filter allows easy and safe fitting, and can be changed in seconds without tools – an original KTM standard feature.
Saddle
Perfectly ergonomic, the new saddle offers a greater volume of foam plastic guaranteeing comfort and longevity for the same weight as the previous model.
Framework
The new frame design offers approximately 20% greater torsional stiffness, approximately 30% lower longitudinal stiffness, and features redesigned engine mounts to reduce vibration. This gain in flexibility allows a better absorption of the energy generated by the loads of the front and rear wheels, assisting the suspension for a gain in comfort and a reduction in pilot fatigue. 0.4 ° greater steering angle and 10mm shorter wheelbase help improve handling, as well as 380g lighter weight compared to the predecessor model.
Handlebar
The new SX generation models are fitted with a new NEKEN tapered handlebars in high strength aluminum, mounted on a new clamp fitted with a damper gasket and offering two handlebar mounting positions.
Footrest
A new “zero dirt” footrest concept prevents dirt from jamming the footrests when they are brought back into position, even in deep ruts. The new footrests are also wider and more stable, offer better grip and are lighter than previous models..
Swinging arm
As on previous models, the new generation SX is equipped with a new cast aluminum swingarm. The new one-piece molded swingarm offers reduced weight and optimized flex behavior enhancing damping characteristics. Weight gain is 250 g.
Tank
All models in the SX range are equipped with a new ultra-light polyethylene tank with a capacity of 7.0 liters. The tank cap with internal thread ensures easy and reliable closing. Four-stroke models are equipped with an integrated fuel pump system.
Cooling system
The integrated KTM cooling system routes the coolant from the cylinder head through the triangle of the frame to the new WP aluminum radiators, fitted with a new cap system and made of a more rigid alloy. Thanks to optimized internal circulation and ventilation calculated by CFD simulation, the cooling efficiency has been improved by approximately 10%. Sophisticated radiator guards provide effective protection in the event of an accident.
Wheels
The 125 SX features ultralight CNC machined hubs, premium Excel rims, new lightweight spokes, and aluminum spoke heads that provide maximum stability at minimum weight. Dunlop’s new MX tires (Geomax MX 32) were developed with the KTM racing team in the USA based on factory tests and the racing experience of seasoned riders. They guarantee perfect traction and exceptional performance.
Brakes
High-tech Brembo brakes have always been standard equipment on KTM off-road motorcycles. They are combined with redesigned, lightened wave-type discs with improved thermal resistance manufactured by GALFER. The ultimate solution in braking technology. Weight reduction of 63 g at the front, 32 g at the rear.
Dressing
For the new generation of SX models, KTM factory riders collaborated on the design of the exterior with KTM R&D specialists and Kiska Design. The goal was to achieve perfect harmony between the rider and the bike, down to the smallest detail. The result: new plastics offering perfect ergonomics and contact points for the rider, maximum freedom of movement, a saddle lowered by 10 to 20 mm (at the rear) and better comfort, especially at the rear. saddle.
Graphics
New modern IML graphics highlight the sporty character of the 2016 SX line-of-the-art motocross.
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7,450 €
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Replaces
125 SX 2015
Model marketed in
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2020
The technical aspect
2016 KTM 125 SX
- Frame
- Frame: Central tubular frame in chrome-molybdenum steel
- 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: 300 mm
- 1 disc Ø 260 mm, 2 piston caliper
- Front wheel:
80/100
– 21
- Transmission
- 6-speed gearbox
- Secondary chain transmission
- 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
, 2 stroke - Cooling: by water
- Keihin PWK 38S AG Carburetor
-
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
Yamaha YZ 125 2016
Husqvarna TC 125 2016
Gallery
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