| KTM's profilation of this bike |
| A lightweight chassis teams up with the most competitive 125 cc 2-stroke engine in its class, delivering superior agility and power to fulfil 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. |
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General information |
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Model
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KTM 125 SX |
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Year model
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2021 |
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Type
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Enduro / offroad |
| Price as new | US$ 7399. MSRP depends on country, taxes, accessories, etc. |
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Rating
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2.8 Check out the detailed rating of off-road capabilities, engine performance, maintenance cost, etc. Compare with any other bike. |
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Engine and transmission |
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Engine size
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124.8 ccm (7.62 cubic inches) |
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Type of engine
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Single cylinder, two-stroke |
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Effect
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15.0 HP (10.9 kW)) |
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Bore x stroke
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54.0 x 54.5 mm (2.1 x 2.1 inches) |
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Fuel system
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Injection |
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Fuel control
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Double Overhead Cams/Twin Cam (DOHC) |
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Ignition
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Kokusan EMS |
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Lubrication system
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Wet sump |
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Cooling system
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Liquid |
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Gearbox
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6-speed |
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Transmission type
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Chain (final drive) |
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Clutch
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Multi-plate clutch, Brembo hydraulics |
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Driveline
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5/8 x 1/4 (520) O Ring. Primary drive: 22:72. |
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Chassis, suspension, brakes and wheels |
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Frame type
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Central double-cradle-type 25CrMo4 steel |
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Rake (fork angle)
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26.1° |
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Front suspension
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WP XACT-USD, Ø 48 mm |
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Front wheel travel
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310 mm (12.2 inches) |
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Rear suspension
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WP XACT Monoshock with linkage |
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Rear wheel travel
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300 mm (11.8 inches) |
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Front tire
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110-17 |
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Rear tire
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150-17 |
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Front brakes
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Single disc |
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Diameter
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260 mm (10.2 inches) |
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Rear brakes
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Single disc |
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Diameter
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220 mm (8.7 inches) |
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Physical measures and capacities |
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Dry weight
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87.5 kg (192.9 pounds) |
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Power/weight ratio
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0.1714 HP/kg |
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Seat height
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850 mm (33.5 inches) If adjustable, lowest setting. |
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Ground clearance
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375 mm (14.8 inches) |
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Fuel capacity
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7.50 litres (1.98 US gallons) |
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Other specifications |
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Color options
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White/Orange |
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Starter
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Kick |
| Update specs | Report missing specs or required updates. |
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Further information |
| Insurance costs | Compare US insurance quotes from the nation's top providers. |
| Parts finder |
Check out our overview of motorcycle webshops at Bikez.info. |
| Maintenance | Find parts, fluids. filters, maintenance tools and service manuals at Amazon.com. |
| Ask questions | Join the 21 KTM 125 SX discussion group or the general KTM discussion group. |
| Related bikes | List related bikes for comparison of specs. |
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Compare with another motorcycle |
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Rating sample for this KTM bike
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Racing track capabilities for the 2021 KTM 125 SX:
 (52.8 out of 100)
Click here for complete rating. You can also compare bikes.
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