Zündapp KS 125 Sport vs Yamaha YZ 125X (2026)
Side-by-side spec comparison, pricing, and a plain-English breakdown of how the Zündapp KS 125 Sportstacks up against the Yamaha YZ 125X. Numbers pulled from manufacturer spec sheets — click either bike for the full review.
Spec comparison
| Spec | Zündapp KS 125 Sport | Yamaha YZ 125X |
|---|---|---|
| Model year | 1977 | 2026 |
| Price | — | $7,299 |
| Engine | 124 cc | 125 cc |
| Horsepower | 17 hp | — |
| Weight | — | 96 kg |
| Seat height | — | 970 mm |
| Fuel capacity | 3.7 L | 6.0 L |
| Fuel type | petrol | petrol |
| Transmission | 5-speed | Manual, 6 speed, Chain |
| Front brakes | Expanding brake | Hydraulic Disc |
| Rear brakes | Expanding brake | Hydraulic Disc |
| Tires | 2.75-18 / 3.25-18 | Dunlop® Geomax MX33F 80/100 - 21 / Dunlop® Geomax MX33 110/100 - 18 |
Zündapp KS 125 Sport vs Yamaha YZ 125X — which should you buy?
Picking between the Zündapp KS 125 Sport and the Yamaha YZ 125X usually comes down to the numbers you care about most. On paper, the Zündapp KS 125 Sport brings 17 hp, while the Yamaha YZ 125X counters with its own power figure at 96 kg.
Our spec tables above highlight the winning number on each line. For the full rider-focused reviews including real-world fuel economy, service costs and available colors, click into either bike: