Specs compared
KTM 125 SX 2027 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: engine, rear tire, coolant capacity, seat height and weight. The same on both: chain pitch and front tire. Checked 28 Sep 2026 and 16 Oct 2026.
| Spec | KTM 125 SX 2027 | Suzuki RM-Z450 2027 |
|---|---|---|
| EnginePrinted differently | 125cc 2T | 449cc 4T |
| Stock gearing | 13T / 50TOwner's manual p. 146 | Not yet verified |
| Final drive ratio | 3.85 : 1Calculated from the stock sprockets | Not yet verified |
| Chain pitchSame | 520Owner's manual p. 146 | 520Manufacturer spec sheet (research) |
| Front tireSame | 80/100-21 TTOwner's manual p. 146 | 80/100-21 51MOwner's manual p. 6-40 |
| Rear tirePrinted differently | 100/90-19 TTOwner's manual p. 146 | 110/90-19 62MOwner's manual p. 6-40 |
| Fork travel | 310 mm (12.2 in)Owner's manual p. 145 | Not yet verified |
| Shock travel | 300 mm (11.8 in)Owner's manual p. 145 | Not yet verified |
| Engine oil capacity | Not yet verified | 1050 ml (35.5 fl oz)Owner's manual p. 6-26 |
| Premix ratio | 40:1Owner's manual p. 146 | Not yet verified |
| Coolant capacityPrinted differently | 1200 ml (40.6 fl oz)Owner's manual p. 145 | 1100 ml (37.2 fl oz)Owner's manual p. 3-6 |
| Seat heightPrinted differently | 958 mm (37.7 in)Owner's manual p. 146 | 960 mm (37.8 in)Manufacturer spec sheet (research) |
| WeightPrinted differently | 92 kg (203 lb)Owner's manual p. 146 | 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. KTM 125 SX: 520 chains · Front tires 80/100-21 · Rear tires 100/90-19. 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.