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New 2018 KTM 125SX2018

0 Klms
: 0 Klms
: Orange, Black, Silver
: 125 cc
: ktm125sx18
The whip cracking KTM 125 SX has been at the front for years. With phenomenal performance on tap, it will be there for many more seasons to come. A compact chassis and the lowest weight out there is teamed up with a high performance 125cc 2-stroke engine for a surefire trophy collection. Get shredding, youngsters.


125SX Engine

The latest KTM 125 SX engine is the most powerful and most competitive engine in its class; a clear statement that KTM is keen on keeping 2-stroke technology at the forefront of development. The secret to their success is an outstanding power-to-weight ratio, low costs and simplicity. This 125cc ripper has been developed with the latest KTM engineering know-how and the most advanced technology available. The results: class-leading power across the rev range, while being extremely compact and ultra-light at a mere 17.2kg. Our work here is done; now it’s up to you to collect the trophies.

The result is that it produces better power all over the rev range, it is with 17.2 kg more than 2 kg lighter than the predecessor and it is much more compact.

The benefit for the rider will be reflected in faster lap times due to better rideability and higher performance.
125SX Engine

A lightweight polyethylene tank with a capacity of 7.0 liters of juice. The filler cap has an inside thread, which makes for easy and reliable closure.
125SX Engine

The high-tech, lightweight chrome-moly steel frame has a knack for easy handling, outlandish rideability, precise cornering and excellent stability. You can also count on high torsional rigidity and low longitudinal stiffness. This results in better absorption of the energy created from the front and rear suspension, sucking up jumps and bumps. In short: more comfort and less rider fatigue. Laterally attached, engine head stays (the connection between cylinder head and frame) are now made of lightweight aluminum. They contribute to more precise cornering and a reduced vibration level. The engineers were able to pull off all that, while making their frame a big fat kilogram lighter than that of the lightest competitor on the market. In addition, it 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 subframe made of stable aluminum profiles, which tiptoes the scales at less than 900g.
125SX Engine

KTM’s proven cooling system routes the coolant from the cylinder head through the frame triangle, directly to aluminum radiators made by WP. Thanks to flow optimized internal circulation and CFD-calculated ventilation, the system is superbly efficient. In addition, new radiator protections improve heat dissipation. Especially in the mud. They are also integrated into the front part of the shrouds to protect the radiators in a crash.
125SX Exhaust

The engineers meticulously tuned the resonator chamber for maximum torque and power, so this little screamer is as tough as it is strong.

This reliable piece of engineering has been skillfully balanced to guarantee minimal vibration. In its latest form, it allows an increase of the displacement to 144cc just by replacing cylinder, piston and head. There’s no more need to change the crankshaft. Two-in-one in no time
125SX Suspension
The WP shock absorber has been developed with the entire frame and swingarm architecture in mind, including the linkage and the WP AER 48 front fork. It features machined and black anodized components and is a valuable, high-end product compared to roughcast reservoirs. A new, confidence inspiring setting with improved damping characteristics perfectly matches the front-end setup and its sparkling WP color scheme lets everyone know you have excellent taste in suspension.
The fully adjustable WP 5018 shock absorber has been completely retuned to suit the new linkage.
125SX 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 2-chamber system with a capsuled air cartridge to prevent loss of air pressure. Should the outer seal start to leak, the internal cartridge pressure will keep the bike in position. The air spring is easy to adjust to any rider weight via a single air valve. No special tools are required; the fork air pump supplied with the bike will do just fine. 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). Right off the dealer floor, this fork (with reworked damping characteristics) is more comfortable and more sensitive than ever. But you can still hammer the hell out of it.
125SX Triple Clamps

Top quality, CNC machined triple clamps have been a KTM trademark for years to ensure precise handling. The rubber damped handlebar fixation allows for two positions and an hourmeter is fitted in order to let the rider know it’s time for a service.

Ensuring a precise handling, they perceptibly support the flex characteristics, and with it, the action of the forks. For MY 16 the upper triple clamp features a newly developed rubber damping system for the handlebar clamp in order to reduce the vibration level of the handlebar.

The clamps retain their forward and back adjustability for any rider preference.
125SX Wheels
Featuring lightweight, CNC machined hubs and high-end Excel rims, they guarantee maximum stability and minimal unsprung weight. The wheels are shod with the latest Dunlop Geomax MX 3S tires. .
125SX Bodywork
KTM R&D, KISKA Design and all our factory riders 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. 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.
125SX Handlebars

KTM engineers sure know how to handle handlebars. This tapered one, made of high-strength aluminum, is fixed in damped rubber mounts and has two different positions.. ODI lock-on grips make grip changes easy and do not require any wire or glue to be secured.
125SX Airbox

The air filter box design offers maximum protection of the air filter against soiling, 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.
125SX Seat

These high-tech Brembo babies are combined with lightweight Wave brake discs. You couldn’t brake any harder, better, faster or stronger. .
125SX Graphics

A new, tailor-made kit and a Factory orange frame. Because in this sport, champs deserve to look the part regardless of the dirt.
125SX 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 too.
Technical Details - Engine
Design   1-cylinder 2-stroke engine, water-cooled, with reed intake & exhaust control
Displacement   124.8 cm³
Bore   54mm
Stroke   54.5mm
Starting aid   Kickstarter
Transmission   6 gear, claw shifted
Engine Lubrication   Mixture oil lubrication
Primary gear ratio   23:73
Final Drive   13:50
Cooling system   Water Cooled
Clutch   Multi-plate clutch, Brembo hydraulics
Ignition system   Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
Technical Details - Chassis
Frame   Chrome-molybdenum steel central-tube frame
Forks   WP USD Ø 48 mm 4CS closed cartridge
Shock Absorber   WP monoshock with linkage
Suspension travel Front   300 mm
Suspension travel Rear   300 mm
Brake System   Disc brakes, brake calipers on floating bearings
Brake system Rear   Disc brakes, brake calipers on floating bearings
Brake discs - diameter Front   260 mm
Brake discs - diameter Rear   220 mm
Technical Details - Chassis (cont)
Chain   520
Steering head angle   63.9°
Wheel base   1,480±10mm
Ground clearance (unloaded)   375 mm
Seat height (unloaded)   960 mm
Total fuel tank capacity approx.   7.0 L
Weight without fuel approx.   89.2 kg