Specs compared
Kawasaki KX250F 2027 vs Kawasaki KX450F 2006–2008
Motocross, stock specs side by side. Each value names the page it came from; a blank on either side stays blank.
Printed differently: engine, front tire, rear tire, fork travel, shock travel and seat height. Checked 25 Sep 2026 and 27 Sep 2026.
| Spec | Kawasaki KX250F 2027 | Kawasaki KX450F 2006–2008 |
|---|---|---|
| EnginePrinted differently | 249cc 4T | 449cc 4T |
| Stock gearing | Not yet verified | 13T / 50TOwner's manual p. 1-9 |
| Final drive ratio | Not yet verified | 3.85 : 1Calculated from the stock sprockets |
| Chain pitch | Not yet verified | 520Owner's manual p. 2-34 |
| Front tirePrinted differently | 80/100-21Manufacturer spec sheet (research) | 90/100-21 57MOwner's manual p. 1-9 |
| Rear tirePrinted differently | 110/90-19Manufacturer spec sheet (research) | 120/80-19 63MOwner's manual p. 1-9 |
| Fork travelPrinted differently | 305 mm (12.0 in)Manufacturer spec sheet (research) | 315 mm (12.4 in)Owner's manual p. 1-9 |
| Shock travelPrinted differently | 307 mm (12.1 in)Manufacturer spec sheet (research) | 315 mm (12.4 in)Owner's manual p. 1-9 |
| Engine oil capacity | Not yet verified | 1200 ml (40.6 fl oz)Owner's manual p. 1-8 |
| Seat heightPrinted differently | 955 mm (37.6 in)Manufacturer spec sheet (research) | 965 mm (38.0 in)Owner's manual p. 1-8 |
| Weight | 109.2 kg (241 lb)Manufacturer spec sheet (research) | Not yet verified |
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 KX250F: Front tires 80/100-21 · Rear tires 110/90-19. Kawasaki KX450F: 520 chains · Front tires 90/100-21 · Rear tires 120/80-19. These are affiliate links: we may earn a commission, at no cost to you, and it never changes the specs. Affiliate disclosure.