2016 KTM 125 SX Base

2016 KTM 125 SX

The high performing and well-proven KTM 125 SX has been on the market at the front of the field for years. For MY 2016 this bike is even better. Powered by lighter and all-new high performance 2-stroke engine, with a power valve and 6-speed gearbox fitted in a new state-of-the-art chassis, the 125 SX remains a favorite among young champions. Once again this lower capacity 2-stroke machine will set a new benchmark in the 125 cm³ class.

• ENGINE

The newly developed 125 cm³ engine for MY 2016 features a completely new architecture with the latest KTM engineering know-how and the most advanced technology in the class. 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.

• TRANSMISSION

A new 6-speed transmission provides the same gear ratios as the previous model, but due to the latest production technologies the width could be reduced by 6 mm and the weight reduced by 200 g. An advanced "NO-DIRT" gear lever design prevents dirt from blocking the joint of the lever guaranteeing safe activation of the transmission.

• NEW CRANK SHAFT

The new crankshaft provides the same stroke of 54.5 mm as in the past, but it features an optimized balancing for minimum vibration while being 50 g lighter.

• PISTON

The new 125 SX piston is optimized for maximal reliability and the reworked shape fits perfectly to the new cylinder layout.

• BATTERY AND WIRING HARNESS

As in the past, all new SX-F engines are fitted with the proven electric starter – a unique KTM feature and a major benefit at all levels of motocross racing. For MY 2016 the SX-F range fits a super compact and lightweight 495 g lithium-ion starter battery into a standard motocross bike, providing safe starting of the engine and reducing the weight by 1 kg over MY 2015!

• SWINGARM

As on the predecessor models, the new SX generation features a reworked cast aluminium swingarm. The updated design offers reduced weight and an optimized flex behavior supporting the frame and suspension created with a single-component casting process. The weight reduction is 250 grams.

• FRAME

The new frame design provides approximately 20 % higher torsional rigidity and 30 % less longitudinal stiffness, with newly designed engine stays for less vibration. This increased flexibility results in better absorption of the energy created from the front and rear wheel loads supporting the suspension for more comfort and less rider fatigue. A 0.4° steeper steering angle and a 10 mm shorter wheel base contribute to better handling and last but not least it´s around 380 g lighter than the previous model.

• MONOSHOCK

The new generation of monoshock made by WP Suspension has been developed for the new SX models in conjunction with the new frame and swingarm architecture, including the reworked linkage system and the new WP forks. The linkage system has also been reworked with a revised geometry and longer pull rods, which was tested last season in most of the KTM factory bikes.