The 2015 Yamaha MT-25 and 2017 Yamaha R15S were built in Indonesia and India respectively for riders seeking accessible Japanese sport performance. The MT-25 is a 249 cc parallel-twin naked bike based on the YZF-R25. The R15S is a 149.8 cc fully faired single-cylinder sportbike with a friendlier one-piece seat than the R15 V2.
Both are lightweight road machines, but the extra cylinder and capacity give the MT-25 a substantial performance advantage.
MT-25 and R15S Specifications
| Specification | 2015 MT-25 | 2017 R15S |
|---|---|---|
| Engine | 249 cc liquid-cooled parallel-twin | 149.8 cc liquid-cooled single |
| Maximum power | 36 PS at 12,000 rpm | 17 PS at 8,500 rpm |
| Maximum torque | 22.6 Nm at 10,000 rpm | 15 Nm at 7,500 rpm |
| Transmission | 6-speed manual | 6-speed manual |
| Wet weight | 165 kg | Approximately 134 kg |
| Seat height | 780 mm | Approximately 800 mm |
| Fuel capacity | 14 liters | 12 liters |
| Tires | 110/70-17 front, 140/70-17 rear | 90/80-17 front, 130/70-17 rear |
Everyday Naked Bike or Small Faired Sportbike?
The first-generation MT-25 used an upright handlebar, low seat and exposed mechanical layout for comfortable daily riding. Its twin-cylinder engine made power high in the rev range but remained more flexible and faster than the smaller R15S. A 298 mm front disc and wider tires matched the additional performance.
The R15S countered with lower mass, better wind protection and significantly lower fuel consumption. Its Deltabox frame, rear monoshock and six-speed transmission gave it genuine sporting structure, while the one-piece seat improved passenger practicality. The 2017 version predated the later 155 cc VVA-powered R15S, so current-model specifications should not be applied to it.
Choose the MT-25 for stronger acceleration, an upright posture and 250-class versatility. Choose the R15S for economical commuting, light controls and full-fairing style. Used examples deserve checks for crash repairs, chain maintenance, tire age and improvised electrical accessories.
