Specs compared
Kawasaki KX450 2026 vs KTM 150 SX 2025
Motocross, stock specs side by side. Each value names the page it came from; a blank on either side stays blank.
Printed differently: engine, rear tire, fork travel, shock travel, seat height and weight. The same on both: front tire. Checked 25 Sep 2026 and 29 Sep 2026.
| Spec | Kawasaki KX450 2026 | KTM 150 SX 2025 |
|---|---|---|
| EnginePrinted differently | 449cc 4T | 150cc 2T |
| Stock gearing | Not yet verified | 13T / 48TOwner's manual p. 134 |
| Final drive ratio | Not yet verified | 3.69 : 1Calculated from the stock sprockets |
| Chain pitch | Not yet verified | 520Owner's manual p. 134 |
| Front tireSame | 80/100-21Manufacturer spec sheet (research) | 80/100-21 51M TTOwner's manual p. 135 |
| Rear tirePrinted differently | 120/80-19Manufacturer spec sheet (research) | 100/90-19 57M TTOwner's manual p. 135 |
| Fork travelPrinted differently | 305 mm (12.0 in)Manufacturer spec sheet (research) | 310 mm (12.2 in)Owner's manual p. 134 |
| Shock travelPrinted differently | 307 mm (12.1 in)Manufacturer spec sheet (research) | 300 mm (11.8 in)Owner's manual p. 134 |
| Premix ratio | Not yet verified | 40:1Owner's manual p. 33 |
| Coolant capacity | Not yet verified | 1200 ml (40.6 fl oz)Owner's manual p. 133 |
| Seat heightPrinted differently | 960 mm (37.8 in)Manufacturer spec sheet (research) | 958 mm (37.7 in)Owner's manual p. 134 |
| WeightPrinted differently | 112.6 kg (248 lb)Manufacturer spec sheet (research) | 92.1 kg (203 lb)Owner's manual p. 134 |
Each value shows where it came from. The bike pages list the document, page and date checked. “Printed differently” only says the two documents print different figures; it is not a judgement of either bike.
Stock sizes at MotoSport. Kawasaki KX450: Front tires 80/100-21 · Rear tires 120/80-19. KTM 150 SX: 520 chains · Front tires 80/100-21 · Rear tires 100/90-19. These are affiliate links: we may earn a commission, at no cost to you, and it never changes the specs. Affiliate disclosure.