BMW F 800R (2017) vs Yamaha SR 400 (2018)
Comparison technical specifications
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| Make: | BMW | Yamaha |
| Model: | F 800R | SR 400 |
| Years: | 2017 | 2018 |
| Engine: | Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder | Four stroke, single cylinder, SOHC, 2 valves per cylinder. |
| Capacity: | 798 cc / 47.7 cub. in. | 399 cc / 24.3 cu-in |
| Bore x Stroke: | 82 x 75.8 mm | 87 х 67.2 mm |
| Compression Ratio: | 12.0:1 | 8.5:1 |
| Lubrication: | Wet sump | Dry sump |
| Induction: | Electronic injection, digital engine electronics (BMS-KP) | Fuel injection |
| Ignition: | Knock control and oxygen sensors. | TCI |
| Starting: | Electric | Kick |
| Max Power: | 66 kW / 90 hp @ 8000 rpm | 27 hp / 17.1 KW @ 7000 rpm |
| Max Torque: | 86 Nm / 8.8 kgf-m / 63 lbs/ft @ 8000 rpm | 27.4 Nm / 6.3 kgf-m @ 6500 rpm |
| Clutch: | Multi-plate clutch in oil bath, mechanically operated | Wet, Multiple Disc |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | Belt | Chain |
| Frame: | Bridge frame made aluminium, load-supporting engine | Steel Double Cradle |
| Front Suspension: | ∅43mm Telescopic fork | Telescopic fork |
| Front Wheel Travel: | 125 mm / 4.9 in. | 111 mm / 4.3 in |
| Rear Suspension: | Cast aluminium double-sided swing arm, central, suspension strut, spring pre-tension by means of hand | Dual shocks |
| Front Brakes: | 2 x ∅320mm discs, 4 piston calipers | Single disc |
| Rear Brakes: | Single ∅265mm disc, 1 piston caliper | Drum |
| Front Tyre: | 120/70 ZR17 | 3.50-19 |
| Rear Tyre: | 180/55 ZR17 | 4.00-16 |
| Dimensions: | Length 2145 mm / 84.4 in. Width 860 mm / 35.6 in. (incl. mirrors) Height 1235 mm / 45.7 in (excl. mirrors) | Length 2085 mm / 82.1 in Width 750 mm / 29.5 in Height 1090 mm / 43.1 in |
| Seat Height: | 790 mm / 31.1 in (optional low seat: 770 mm -optional high seat: 820 mm ) | 790 mm / 30.9 in |
| Wet Weight: | 199 kg / 439 lbs. | 174 kg / 384 lbs |
| Fuel Capacity: | 16 Litres / 4.2 US gal | 12 Litres / 3.2 US gal |