2021 Yamaha YZ125X vs 2022 KTM 125 SX
Full specifications comparison •
2 motorcycles
Full Specifications
Differs
Same
| General |
| Colours | Team Yamaha Blue | White/orange/blue |
| Warranty | 30 Day Limited Factory Warranty | - |
| Dimensions |
| Ground Clearance (in.) | 13.8 inches | 14.8 inches |
| Ground Clearance (mm) | 351 mm | 375 mm |
| Seat Height | 975 mm / 38.4 in. | 950 mm / 37.4 in. |
| Wheelbase | 1455 mm / 57.3 in. | - |
| Height | 1285 mm / 50.6 in. | - |
| Length | 2141 mm / 84.3 in. | - |
| Width | 825 mm / 32.5 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 | 94.8 kg / 209.0 lbs | - |
| Performance |
| Power-to-Weight Ratio | - | 0.1714 HP/kg |
| 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 | - |
| Fuel System | Carburettor. Mikuni TMX 38 | Injection |
| Compression Ratio | 8.8:1 | - |
| Engine Lubrication | Premix | Wet sump |
| Ignition | CDI | Kokusan EMS |
| Starter | Kick | Kick |
| Drivetrain |
| Clutch | O-ring chain | Multi-plate clutch, Brembo hydraulics |
| Final Drive | Chain (final drive) | Chain (final drive) |
| Gearbox | 6-speed | 6-speed |
| Primary Drive | - | 5/8 x 1/4 (520) O Ring. Primary drive: 22:72. |
| Chassis |
| Frame Type | Semi-double cradle aluminium frame | Central double-cradle-type 25CrMo4 steel |
| Suspension - Front | KYB® Speed-Sensitive System inverted fork; fully adjustable | WP XACT-USD, Ø 48 mm |
| Suspension - Rear | KYB® single shock; fully adjustable | WP XACT Monoshock with linkage |
| Rake | 26.8° | 26.1° |
| Trail | 117 mm / 4.6 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 |
| Brakes - Rear | Single disc. Hydraulic. | Single disc |
| Rims | Dunlop® AT81 tires | - |
| Tyres - Front | 90/90-21 | 110-17 |
Verdict
🏆
Winner on specs
2022 KTM 125 SX
The 2022 KTM 125 SX edges out the 2021 Yamaha YZ125X thanks to its lower seat height, fuel injection and greater ground clearance. Specifications are one part of the picture - dealer support, parts availability, and intended use all matter too.
Key Differences
2021 Yamaha YZ125X - Advantages
- ✓Competitive all-round: The 2021 Yamaha YZ125X matches or exceeds its rival across all measured criteria.
2022 KTM 125 SX - Advantages
- 📏Lower seat height: 950 mm vs 975 mm - accessible to a wider range of rider heights.
- 🔧Fuel injection: Precise fuelling, better cold-start reliability, and lower maintenance requirements.
- 🏔️More ground clearance: 375 mm vs 351 mm - better clearance over rocks and obstacles.
2021 Yamaha YZ125X vs 2022 KTM 125 SX - FAQs
Which bike is better for shorter riders, the 2021 Yamaha YZ125X or the 2022 KTM 125 SX?
The 2022 KTM 125 SX has the lower seat at 950 mm, making it more accessible. The 2021 Yamaha YZ125X 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 2021 Yamaha YZ125X or the 2022 KTM 125 SX?
Both are strong choices. The 2021 Yamaha YZ125X has its own strengths, while the 2022 KTM 125 SX stands out for lower seat height and fuel injection. Visit dealers, arrange test rides, and factor in local parts and service costs - these often matter as much as the spec sheet.