KTM 125 SX 2012 specs
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| Displacement | 124.80 ccm (7.62 cubic inches) |
| Engine Details | Single cylinder, two-stroke |
| Bore X Stroke | 54.0 x 54.5 mm (2.1 x 2.1 inches) |
| Fuel System | Carburettor. Keihin PWK 39 |
| Ignition | Kokusan digital 2K-1 |
| Lubrication System | Mixture oil lubrication 1:40 |
| Engine Type | Reed intake. |
| Cooling System | Liquid |
| Gearbox | 6-speed |
| Clutch | Wet multi-disc clutch, operated hydraulically |
| Exhaust System | Aluminum |
| Transmission Type Final Drive | Chain |
| Driveline | 13:50. Primary drive: 23:73. |
| Power | 15.0 HP (10.9 kW)) |
| Rear Wheel Travel | 300 mm (11.8 inches) |
| Frame Type | Central double-cradle-type 25 CrMo4 |
| Front Brakes | Single disc |
| Front Brakes Diameter | 260 mm (10.2 inches) |
| Front Suspension | WP-USD 48 mm (1.89 inches) |
| Front Tyre | 80/100-21 |
| Front Wheel Travel | 300 mm (11.8 inches) |
| Rake | 27.0° |
| Rear Brakes | Single disc |
| Rear Brakes Diameter | 220 mm (8.7 inches) |
| Rear Suspension | WP-PDS shock absorber |
| Rear Tyre | 100/90-19 |
| Trail | 120 mm (4.7 inches) |
| Wheels | 1.60 x 21in., 2.15 x 19in. Excel |
| Seat Height | 925 mm (36.4 inches) If adjustable, lowest setting. |
| Dry Weight | 87.8 kg (193.6 pounds) |
| Fuel Capacity | 7.00 litres (1.85 gallons) |
| Ground Clearance | 375 mm (14.8 inches) |
| Alternate Seat Height | 675 mm (26.6 inches) If adjustable, highest setting. |
| Power Weight Ratio | 0.1714 HP/kg |
| Starter | Kick |
| Color Options | Orange/white/black |
| Comments | Offroad Competition model |
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