Specs compared
Honda CRF450R 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, stock gearing, front tire, rear tire, fork travel, shock travel, engine oil capacity and seat height. The same on both: chain pitch. Checked 25 Sep 2026 and 16 Oct 2026.
| Spec | Honda CRF450R 2027 | Kawasaki KX450F 2006–2008 |
|---|---|---|
| EnginePrinted differently | 450cc 4T | 449cc 4T |
| Stock gearingPrinted differently | 13T / 51TManufacturer spec sheet (research) | 13T / 50TOwner's manual p. 1-9 |
| Final drive ratio | 3.923 : 1Owner's manual p. 74 | 3.85 : 1Calculated from the stock sprockets |
| Chain pitchSame | 520Manufacturer spec sheet (research) | 520Owner's manual p. 2-34 |
| Front tirePrinted differently | 80/100-21 51MOwner's manual p. 73 | 90/100-21 57MOwner's manual p. 1-9 |
| Rear tirePrinted differently | 120/90-19 66MOwner's manual p. 73 | 120/80-19 63MOwner's manual p. 1-9 |
| Fork travelPrinted differently | 310 mm (12.2 in)Manufacturer spec sheet (research) | 315 mm (12.4 in)Owner's manual p. 1-9 |
| Shock travelPrinted differently | 305 mm (12.0 in)Manufacturer spec sheet (research) | 315 mm (12.4 in)Owner's manual p. 1-9 |
| Engine oil capacityPrinted differently | 1070 ml (36.2 fl oz)Owner's manual p. 74 | 1200 ml (40.6 fl oz)Owner's manual p. 1-8 |
| Coolant capacity | 1080 ml (36.5 fl oz)Owner's manual p. 74 | Not yet verified |
| Seat heightPrinted differently | 953 mm (37.5 in)Owner's manual p. 73 | 965 mm (38.0 in)Owner's manual p. 1-8 |
| Weight | 108 kg (238 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. Honda CRF450R: 520 chains · Front tires 80/100-21 · Rear tires 120/90-19. 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.