KTM SX125
The KTM 125 SX was a single cylinder, two-stroke cross / motocross motorcycle produced between 1999 and 2019.
Engine[edit | edit source]
The engine was a liquid cooled single cylinder, two-stroke. A 54.0mm bore x 54.5mm stroke result in a displacement of just 124.8 cubic centimeters.
Drive[edit | edit source]
The bike has a 6-speed transmission. The final drive was via chain. Power was moderated via the wet multi-disc clutch, hydraulically actuated.
Chassis[edit | edit source]
It came with a 80/100-21 front tire and a 100/90-19 rear tire. Stopping was achieved via single disc. brake calipers on floating bearings in the front and a single disc. brake calipers on floating bearings in the rear. The front suspension was a wp-usd, aer 48, ø 48 mm while the rear was equiped with a wp shock absorber with linkage. The 125 SX was fitted with a 1.98 Gallon (7.50 Liters) fuel tank. The bike weighed just 192.9 pounds (87.5 Kg). The wheelbase was 58.46 inches (1485 mm) long.
In Media[edit | edit source]
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| KTM SX125 | |
| Manufacturer | |
|---|---|
| Also called | SX 125, 125 SX |
| Production | 1999 - 2019 |
| Class | Enduro |
| Engine | single cylinder, two-stroke |
| Bore / Stroke | 54.0mm x 54.5mm |
| Compression ratio | 12.0:1 |
| Horsepower | 13.54 HP (10.1 KW) @ 8400RPM |
| Torque | 10.33 ft/lbs (14.0 Nm) @ 7500RPM |
| Fuel System | carburetor. mikuni tmx |
| Ignition | kokusan ems |
| Transmission | Gear box: 6-speed Final Drive: chain |
| Suspension | Front: wp-usd, aer 48, ø 48 mm Rear: wp shock absorber with linkage |
| Brakes | Front: single disc. brake calipers on floating bearings Rear: single disc. brake calipers on floating bearings |
| Front Tire | 80/100-21 |
| Rear Tire | 100/90-19 |
| Wheelbase | 58.46 inches (1485 mm) |
| Seat Height | 37.4 inches (950 mm) |
| Weight | 192.9 pounds (87.5 Kg) (dry), 87.0 kg (wet) |
| Fuel Capacity | 1.98 Gallon (7.50 Liters) |
| Manuals | Service Manual |
The KTM 125 SX was a single cylinder, two-stroke Enduro motorcycle produced by KTM between 1999 and 2019. Max torque was 10.33 ft/lbs (14.0 Nm) @ 7500 RPM. Claimed horsepower was 13.54 HP (10.1 KW) @ 8400 RPM.
Engine[edit | edit source]
The engine was a liquid cooled single cylinder, two-stroke. A 54.0mm bore x 54.5mm stroke result in a displacement of just 124.8 cubic centimeters.
Drive[edit | edit source]
The bike has a 6-speed transmission. Power was moderated via the wet multi-disc clutch, hydraulically actuated.
Chassis[edit | edit source]
It came with a 80/100-21 front tire and a 100/90-19 rear tire. Stopping was achieved via single disc. brake calipers on floating bearings in the front and a single disc. brake calipers on floating bearings in the rear. The front suspension was a wp-usd, aer 48, ø 48 mm while the rear was equipped with a wp shock absorber with linkage. The 125 SX was fitted with a 1.98 Gallon (7.50 Liters) fuel tank. The bike weighed just 192.9 pounds (87.5 Kg). The wheelbase was 58.46 inches (1485 mm) long.
2005 KTM 125 SX[edit | edit source]
KTM has been serious about 125 cc-class motocross, and this dedication has manifested in the 125 SX for several years now. The changes made by KTM put in production for 2005 have resulted in a greatly improved orange machine. As far as the engine is concerned, KTM left a good thing pretty much alone. It was the most-powerful 125 of 2004 and we expect that to be true in 2005.
2017 KTM 125 SX[edit | edit source]
The latest 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 125cm3 ripper has been developed with the latest KTM engineering know-how and the most advanced technology available.