Yamaha XT 250T (1983) vs BMW R 18 (2021)
Comparison technical specifications
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| Make: | Yamaha | BMW |
| Model: | XT 250T | R 18 |
| Years: | 1983 | 2021 |
| Engine: | Four stroke, single cylinder, SOHC, 4 Valve | Four stroke, two cylinder horizontally opposed Boxer, Pushrod-actuated OHV w/ two camshafts, 4 valves per cylinder |
| Capacity: | 249 cc / 15.2 cu-in | 1802 cc / 110 cu-in |
| Bore x Stroke: | 73 х 59.6 mm | 107.1 X 100 mm |
| Cooling System: | Air cooled | Air/water cooled |
| Compression Ratio: | 9.5:1 | 9.6:1 |
| Induction: | Carburetors | Fuel injection, 48 mm Throttle valves |
| Starting: | Kick | Electric, 1.5 kW |
| Max Power: | 27 hp / 20.1 kW @ 9000 rpm | 67 kW / 91 hp @ 4750 rpm |
| Max Torque: | 2.2 kgf-m / 15.9 lb-ft @ 7500 rpm | 158 Nm / 116 lb-ft @ 3000 rpm |
| Transmission: | 5 Speed | Constant-mesh 6-speed |
| Final Drive: | Chain | Shaft, Final Drive 3.091 |
| Front Suspension: | 35mm Kayaba air assisted forks | 49 mm Telescopic fork, Non-adjustable |
| Rear Suspension: | Monoshock | Cantilevered spring-preload adjustable shock |
| Front Brakes: | Drum | 2X 300mm discs |
| Rear Brakes: | Drum | Single 300mm disc |
| Front Tyre: | 3.00-21 | 120/70 R 19 or B 19 (manufacturer-dependent) |
| Rear Tyre: | 4.60-18 | 180/65 B 16 |
| Fuel Capacity: | 8.9 Litres / 2.3 US gal | 16 Litres / 4.2 US gal |