Specs compared
Kawasaki KX450F 2006–2008 vs Suzuki RM-Z450 2027
Motocross, stock specs side by side. Each value names the page it came from; a blank on either side stays blank.
Printed differently: front tire, rear tire, engine oil capacity and seat height. The same on both: engine and chain pitch. Checked 25 Sep 2026 and 28 Sep 2026.
| Spec | Kawasaki KX450F 2006–2008 | Suzuki RM-Z450 2027 |
|---|---|---|
| EngineSame | 449cc 4T | 449cc 4T |
| Stock gearing | 13T / 50TOwner's manual p. 1-9 | Not yet verified |
| Final drive ratio | 3.85 : 1Calculated from the stock sprockets | Not yet verified |
| Chain pitchSame | 520Owner's manual p. 2-34 | 520Manufacturer spec sheet (research) |
| Front tirePrinted differently | 90/100-21 57MOwner's manual p. 1-9 | 80/100-21 51MOwner's manual p. 6-40 |
| Rear tirePrinted differently | 120/80-19 63MOwner's manual p. 1-9 | 110/90-19 62MOwner's manual p. 6-40 |
| Fork travel | 315 mm (12.4 in)Owner's manual p. 1-9 | Not yet verified |
| Shock travel | 315 mm (12.4 in)Owner's manual p. 1-9 | Not yet verified |
| Engine oil capacityPrinted differently | 1200 ml (40.6 fl oz)Owner's manual p. 1-8 | 1050 ml (35.5 fl oz)Owner's manual p. 6-26 |
| Coolant capacity | Not yet verified | 1100 ml (37.2 fl oz)Owner's manual p. 3-6 |
| Seat heightPrinted differently | 965 mm (38.0 in)Owner's manual p. 1-8 | 960 mm (37.8 in)Manufacturer spec sheet (research) |
| Weight | Not yet verified | 112 kg (247 lb)Manufacturer spec sheet (research) |
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 KX450F: 520 chains · Front tires 90/100-21 · Rear tires 120/80-19. Suzuki RM-Z450: 520 chains · Front tires 80/100-21 · Rear tires 110/90-19. These are affiliate links: we may earn a commission, at no cost to you, and it never changes the specs. Affiliate disclosure.