Specs compared
KTM 125 SX 2027 vs Triumph TF 450-X 2026
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, rear tire, shock travel, seat height and weight. The same on both: front tire and fork travel. Checked 16 Oct 2026.
| Spec | KTM 125 SX 2027 | Triumph TF 450-X 2026 |
|---|---|---|
| EnginePrinted differently | 125cc 2T | 450cc 4T |
| Stock gearingPrinted differently | 13T / 50TOwner's manual p. 146 | 13T / 49TManufacturer spec sheet (research) |
| Final drive ratio | 3.85 : 1Calculated from the stock sprockets | 3.77 : 1Calculated from the stock sprockets |
| Chain pitch | 520Owner's manual p. 146 | Not yet verified |
| Front tireSame | 80/100-21 TTOwner's manual p. 146 | 80/100-21Manufacturer spec sheet (research) |
| Rear tirePrinted differently | 100/90-19 TTOwner's manual p. 146 | 110/90-19Manufacturer spec sheet (research) |
| Fork travelSame | 310 mm (12.2 in)Owner's manual p. 145 | 310 mm (12.2 in)Manufacturer spec sheet (research) |
| Shock travelPrinted differently | 300 mm (11.8 in)Owner's manual p. 145 | 305 mm (12.0 in)Manufacturer spec sheet (research) |
| Premix ratio | 40:1Owner's manual p. 146 | Not yet verified |
| Coolant capacity | 1200 ml (40.6 fl oz)Owner's manual p. 145 | Not yet verified |
| 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 | 108.3 kg (239 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. Triumph TF 450-X: 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.