Yamaha SR 400 (1988-92) vs Yamaha SR 400 (1978-80) vs Triumph Thruxton TFC (2019)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Triumph |
| Model: | SR 400 | SR 400 | Thruxton TFC |
| Years: | 1988-92 | 1978-80 | 2019 |
| Engine: | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, 270° crank angle parallel-Twin, SOCH, 4 valves per cylinder |
| Capacity: | 399 cc / 24.3 cu-in | 399 cc / 24.3 cu-in | 1200 cc / 73.2 cu-in |
| Bore x Stroke: | 87 х 67.2 mm | 87 х 67.2 mm | 97.6 x 80 mm |
| Compression Ratio: | 8.5:1 | 8.5:1 | 11.0:1 |
| Cooling System: | Air cooled | Air cooled | Liquid cooled |
| Induction: | BSR33 carburetor | BSR33 carburetor | Multipoint sequential electronic fuel injection |
| Ignition: | CDI | CDI | Digital electronic |
| Starting: | Kick | Kick | Electric |
| Max Power: | 27 hp / 17.1 KW @ 7000 rpm | 27 hp / 17.1 KW @ 7000 rpm | 80 kW / 107 hp @ rpm |
| Max Torque: | 27.4 Nm / 6.3 kgf-m @ 6500 rpm | 27.4 Nm / 6.3 kgf-m @ 6500 rpm | 115 Nm / 85 lb-ft @ 4850 rpm |
| Clutch: | Wet, Multiple Disc | Wet, Multiple Disc | Wet multi-plate assist |
| Transmission: | 5 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain, O-ring |
| Frame: | Steel Double Cradle | Steel Double Cradle | Tubular steel cradle, Twin-sided, aluminum swingarm – Clear anodized |
| Front Suspension: | Telescopic fork | 35mm Telescopic fork | Fully adjustable Öhlins NIX30 43mm inverted fork |
| Front Wheel Travel: | 111 mm / 4.3 in | 105 mm / 4.1 in | 120 mm / 4.7 in |
| Rear Suspension: | Dual shocks | Dual shocks, 5-way adjustable preload | Fully adjustable Öhlins piggyback reservoir shocks |
| Front Brakes: | Single disc | Single disc | 2 x 310mm discs with Brembo 4-piston radial monoblock calipers and axial-pump master cylinder, ABS |
| Rear Brakes: | Drum | Drum | Single 220mm disc w/ Nissin 2-piston floating caliper, ABS |
| Front Tyre: | 3.50-19 | 3.50-19 | 120/70 x 17 – Metzeler Racetec RR |
| Rear Tyre: | 4.00-16 | 4.00-16 | 160/60 x 17 – Metzeler Racetec RR |
| Trail: | 111 mm / 4.4 in | 111 mm / 4.4 in | 90.8 mm / 3.57 in |
| Wheelbase: | 1410 mm / 55.5 IN | 1410 mm / 55.5 IN | 1415 mm / 55.7 in |
| Seat Height: | 790 mm / 30.9 in | 790 mm / 30.9 in | 810 mm / 31.9 in |
| Fuel Capacity: | 12 Litres / 3.2 gal | 12 Litres / 3.2 gal | 12.5 Litres / 3.8 US Gal / 2.7 Imp gal |