2020 Yamaha YZ125 vs 2019 KTM 125 SX
Full specifications comparison •
2 motorcycles
Full Specifications
Differs
Same
| General |
| Colours | Team Yamaha Blue | Orange/white/black |
| Warranty | 30 Day Limited Factory Warranty | - |
| Dimensions |
| Ground Clearance (in.) | 14.4 inches | 14.8 inches |
| Ground Clearance (mm) | 366 mm | 375 mm |
| Seat Height | 975 mm / 38.4 in. | 950 mm / 37.4 in. |
| Wheelbase | 1443 mm / 56.8 in. | 1485 mm / 58.5 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 | 8.00 litres / 2.11 US gallons | 7.50 litres / 1.98 US gallons |
| Wet Weight | 93.9 kg / 207.0 lbs | - |
| Engine |
| Bore x Stroke (in,) | 2.1 x 2.1 inches | 2.1 x 2.1 inches |
| Bore x Stroke (mm) | 54.0 x 54.5 mm | 54.0 x 54.5 mm |
| Displacement (cc) | 125.0 cc | 124.8 cc |
| Displacement (ci) | 7.63 cubic inches | 7.62 cubic inches |
| Engine Type | Single cylinder, two-stroke | Single cylinder, two-stroke |
| Engine Detail | Reed-valve-inducted | Reed intake. |
| Fuel System | Carburettor. Mikuni TMX 38 | Carburettor. Mikuni TMX |
| Compression Ratio | 10.7:1 | - |
| Engine Lubrication | Premix | - |
| Ignition | CDI | Kokusan EMS |
| Starter | Kick | Kick |
| Drivetrain |
| Clutch | Multiplate wet clutch | Wet multi-disc clutch, hydraulically actuated |
| Final Drive | Chain (final drive) | Chain (final drive) |
| Gearbox | 6-speed | 6-speed |
| Primary Drive | - | 13:50. Primary drive: 23:73. |
| Chassis |
| Frame Type | Semi-double cradle aluminium frame | Chrome-molybdenum steel central-tube frame |
| Suspension - Front | KYB® Speed-Sensitive System inverted fork; fully adjustable | WP-USD, AER 48, Ø 48 mm |
| Suspension - Rear | KYB® single shock; fully adjustable | WP shock absorber with linkage |
| Rake | 26.0° | 26.1° |
| Trail | 109 mm / 4.3 in. | - |
| Wheel Travel - Front | 300 mm / 11.8 in. | 310 mm / 12.2 in. |
| Wheel Travel - Rear | 315 mm / 12.4 in. | 300 mm / 11.8 in. |
| Wheels & Brakes |
| Brakes - Front | Single disc. Hydraulic. | Single disc. Brake calipers on floating bearings |
| Brakes - Rear | Single disc. Hydraulic. | Single disc. Brake calipers on floating bearings |
| Rims | Dunlop® MX52 | CNC machined hubs. Excel rims. Wire spoked. |
| 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
2020 Yamaha YZ125 - Advantages
- ✓Competitive all-round: The 2020 Yamaha YZ125 matches or exceeds its rival across all measured criteria.
2019 KTM 125 SX - Advantages
- 📏Lower seat height: 950 mm vs 975 mm - accessible to a wider range of rider heights.
2020 Yamaha YZ125 vs 2019 KTM 125 SX - FAQs
Which bike is better for shorter riders, the 2020 Yamaha YZ125 or the 2019 KTM 125 SX?
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 2020 Yamaha YZ125 or the 2019 KTM 125 SX?
Both are strong choices. The 2020 Yamaha YZ125 has its own strengths, while the 2019 KTM 125 SX stands out for lower seat height. Visit dealers, arrange test rides, and factor in local parts and service costs - these often matter as much as the spec sheet.