2021 KTM 125 SX : KICKSTART YOUR MX RACING CAREER.
Introducing the 2021 KTM 125 SX…
The KTM 125 SX is the most compact and lightweight of the full-size bikes and delivers a confidence-inspiring ride like no other. A lightweight chassis teams up with the most competitive 125 cc 2-stroke engine in its class, delivering superior agility and power to fulfill the demands of any young adrenaline seeker. This 2-stroke screamer is the ultimate entry point into the pro ranks and a sure-fire way to add to the trophy collection.
2021 KTM 125 SX Totalmotorcycle.com Key Features
2021 KTM 125 SX Totalmotorcycle.com Features and Benefits
When it comes to power delivery and performance, the exhaust developed specifically for this bike plays a key role and packs a punch that is hard to beat. In addition, its special shape provides slimmer ergonomics while still operating safely within the noise limits for racing.
The KTM 125 SX engine is undoubtedly once again the most competitive and powerful engine in its class. With an outstanding power-to-weight ratio, low cost and overall simplicity, it is clear that 2-strokes will continue to have a successful future at KTM. The compact and durable 37.9 lbs engine was developed using the latest KTM engineering know-how, resulting in broad power across the rev range. Its easy rideability and outstanding performance are benefits that equate to faster lap times and better results.
The airbox on the KTM 125 SX ensures optimal flow dynamics, and together with its intake snorkels, leads to maximum power and quick throttle response. Despite the obvious performance advantages, the design also offers maximum protection against soiling of the air filter. The large Twin-Air air filter is mounted on a cleverly designed stiff cage that minimizes incorrect installation. As found on previous models, filter maintenance is quick and easy and does not require tools – a standard, original feature from KTM.
The frame and subframe on the KTM 125 SX caters for the aggressive riding styles associated with 125 cc racing. The frame itself is professionally crafted from hydroformed chromium molybdenum steel tubes that are robot welded, ensuring the highest levels of consistent quality. The stiffness has been precisely tailored for the most dynamic handling, and works in perfect harmony with the suspension to provide nimble agility without losing high-speed stability. The frame also features “no dirt” footpegs, which have a simple but effective self-cleaning system that ensures the footpegs return to their original position, providing complete control in all conditions. All SX frames feature the same highly durable powder coating as the KTM Factory machines and come with standard frame protectors. The subframe is made from lightweight aluminum, providing rear fender stability and strong support for the rider at little extra weight
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 2019 EXC models, which are 6 mm higher than the SX versions.
All KTM SX models feature a seat that perfectly matches the range’s dynamic performance-oriented ergonomics. The seat cover features silicone strips that provide better feel and grip for the rider. The seat is conveniently fixed to the bike using one long, lateral screw, making it secure and easy to handle.
2021 KTM 125 SX – Totalmotorcycle.com International Specifications/Technical Details
US MSRP Price: $7399 USD
Canada MSRP Price: $ 8799 CDN
Europe/UK MSRP Price: £ 7049 (On The Road inc 20% Vat)
- STROKE54.5 mm
- BORE54 mm
- CLUTCHMulti-plate clutch, Brembo hydraulics
- DISPLACEMENT124.8 cm³
- WEIGHT (WITHOUT FUEL)87.5 kg
- TANK CAPACITY (APPROX.)7.5 l
- FRONT BRAKE DISC DIAMETER260 mm
- REAR BRAKE DISC DIAMETER220 mm
- FRONT BRAKEDisc brake
- REAR BRAKEDisc brake
- CHAIN5/8 x 1/4″
- FRAME DESIGNCentral double-cradle-type 25CrMo4 steel
- FRONT SUSPENSIONWP XACT-USD, Ø 48 mm
- GROUND CLEARANCE375 mm
- REAR SUSPENSIONWP XACT Monoshock with linkage
- SEAT HEIGHT850 mm
- STEERING HEAD ANGLE63.9 °
- SUSPENSION TRAVEL (FRONT)310 mm
- SUSPENSION TRAVEL (REAR)300 mm
Manufacturer Specifications and appearance are subject to change without prior notice on Total Motorcycle (TMW).