Specs compared
KTM 50 SX 2027 vs Yamaha YZ65 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, front tire, rear tire, fork travel, shock travel, premix ratio, coolant capacity, seat height and weight. Checked 28 Sep 2026 and 16 Oct 2026.
| Spec | KTM 50 SX 2027 | Yamaha YZ65 2027 |
|---|---|---|
| EnginePrinted differently | 50cc 2T | 65cc 2T |
| Stock gearing | 11T / 40TOwner's manual p. 126 | Not yet verified |
| Final drive ratio | 3.64 : 1Calculated from the stock sprockets | Not yet verified |
| Chain pitch | 415Owner's manual p. 126 | Not yet verified |
| Front tirePrinted differently | 60/100-12 36J TTOwner's manual p. 127 | 60/100-14 30MOwner's manual p. 9-1 |
| Rear tirePrinted differently | 2.75-10 38J TTOwner's manual p. 127 | 80/100-12 41MOwner's manual p. 9-1 |
| Fork travelPrinted differently | 165 mm (6.5 in)Owner's manual p. 126 | 216 mm (8.5 in)Manufacturer spec sheet (research) |
| Shock travelPrinted differently | 190.5 mm (7.5 in)Owner's manual p. 126 | 269 mm (10.6 in)Manufacturer spec sheet (research) |
| Premix ratioPrinted differently | 60:1Owner's manual p. 127 | 30:1Owner's manual p. 4-4 |
| Coolant capacityPrinted differently | 700 ml (23.7 fl oz)Owner's manual p. 123 | 380 ml (12.8 fl oz)Owner's manual p. 9-1 |
| Seat heightPrinted differently | 653 mm (25.7 in)Manufacturer spec sheet (research) | 755 mm (29.7 in)Owner's manual p. 9-1 |
| WeightPrinted differently | 43.5 kg (96 lb)Owner's manual p. 127 | 61 kg (134 lb)Owner's manual p. 9-1 |
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 50 SX: 415 chains · Front tires 60/100-12 · Rear tires 2.75-10. Yamaha YZ65: Front tires 60/100-14 · Rear tires 80/100-12. These are affiliate links: we may earn a commission, at no cost to you, and it never changes the specs. Affiliate disclosure.