2019 KTM 125 SX vs 2020 Yamaha YZ125
Full specifications comparison •
2 motorcycles
Full Specifications
Differs
Same
| General |
| Colours | Orange/white/black | Team Yamaha Blue |
| Warranty | - | 30 Day Limited Factory Warranty |
| Dimensions |
| Ground Clearance (mm) | 375 mm | 366 mm |
| Ground Clearance (in.) | 14.8 inches | 14.4 inches |
| Seat Height | 950 mm / 37.4 in. | 975 mm / 38.4 in. |
| Wheelbase | 1485 mm / 58.5 in. | 1443 mm / 56.8 in. |
| Height | - | 1295 mm / 51.0 in. |
| Length | - | 2136 mm / 84.1 in. |
| Width | - | 828 mm / 32.6 in. |
| Weights & Capacities |
| Oil Capacity (Quarts) | - | 0.74 US quarts |
| Oil Capacity (l) | - | 0.70 litres |
| Dry Weight | 87.5 kg / 192.9 lbs | - |
| Fuel Capacity | 7.50 litres / 1.98 US gallons | 8.00 litres / 2.11 US gallons |
| Wet Weight | - | 93.9 kg / 207.0 lbs |
| Engine |
| Engine Type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Displacement (cc) | 124.8 cc | 125.0 cc |
| Bore x Stroke (mm) | 54.0 x 54.5 mm | 54.0 x 54.5 mm |
| Bore x Stroke (in,) | 2.1 x 2.1 inches | 2.1 x 2.1 inches |
| Displacement (ci) | 7.62 cubic inches | 7.63 cubic inches |
| Engine Detail | Reed intake. | Reed-valve-inducted |
| Fuel System | Carburettor. Mikuni TMX | Carburettor. Mikuni TMX 38 |
| Compression Ratio | - | 10.7:1 |
| Engine Lubrication | - | Premix |
| Ignition | Kokusan EMS | CDI |
| Starter | Kick | Kick |
| Drivetrain |
| Clutch | Wet multi-disc clutch, hydraulically actuated | Multiplate wet clutch |
| Final Drive | Chain (final drive) | Chain (final drive) |
| Gearbox | 6-speed | 6-speed |
| Primary Drive | 13:50. Primary drive: 23:73. | - |
| Chassis |
| Frame Type | Chrome-molybdenum steel central-tube frame | Semi-double cradle aluminium frame |
| Suspension - Front | WP-USD, AER 48, Ø 48 mm | KYB® Speed-Sensitive System inverted fork; fully adjustable |
| Suspension - Rear | WP shock absorber with linkage | KYB® single shock; fully adjustable |
| Rake | 26.1° | 26.0° |
| Trail | - | 109 mm / 4.3 in. |
| Wheel Travel - Front | 310 mm / 12.2 in. | 300 mm / 11.8 in. |
| Wheel Travel - Rear | 300 mm / 11.8 in. | 315 mm / 12.4 in. |
| Wheels & Brakes |
| Brakes - Front | Single disc. Brake calipers on floating bearings | Single disc. Hydraulic. |
| Brakes - Rear | Single disc. Brake calipers on floating bearings | Single disc. Hydraulic. |
| Rims | CNC machined hubs. Excel rims. Wire spoked. | Dunlop® MX52 |
| Tyres - Front | - | 80/100-21 |
Verdict
🏆
Winner on specs
2019 KTM 125 SX
The 2019 KTM 125 SX edges out the 2020 Yamaha YZ125 thanks to its lower seat height. Specifications are one part of the picture - dealer support, parts availability, and intended use all matter too.
Key Differences
2019 KTM 125 SX - Advantages
- 📏Lower seat height: 950 mm vs 975 mm - accessible to a wider range of rider heights.
2020 Yamaha YZ125 - Advantages
- ✓Competitive all-round: The 2020 Yamaha YZ125 matches or exceeds its rival across all measured criteria.
2019 KTM 125 SX vs 2020 Yamaha YZ125 - FAQs
Which bike is better for shorter riders, the 2019 KTM 125 SX or the 2020 Yamaha YZ125?
The 2019 KTM 125 SX has the lower seat at 950 mm, making it more accessible. The 2020 Yamaha YZ125 sits higher at 975 mm. A seat height below 800 mm suits most riders; above 820 mm shorter riders may need to tiptoe.
Which should I buy, the 2019 KTM 125 SX or the 2020 Yamaha YZ125?
Both are strong choices. The 2019 KTM 125 SX has the edge in lower seat height, while the 2020 Yamaha YZ125 offers a compelling alternative. Visit dealers, arrange test rides, and factor in local parts and service costs - these often matter as much as the spec sheet.