| General |
| Year | 1984 - 87 | 2024 |
| Make Model | Yamaha SR 500 | Triumph Speed 400 |
| Dimensions |
| Seat Height | 810 mm / 32 in | 790 mm / 31.1 in |
| Wheelbase | 1405 mm / 55.3 in | 1377 mm / 54.2 in |
| Height | 1155 mm / 45.5 in | 1075 mm / 42.3 in |
| Length | - | 2056 mm / 80.9 in |
| Width | 845 mm / 33.3 in | 795 mm / 31.3 in |
| Weights & Capacities |
| Dry Weight (kg) | 158 | - |
| Wet Weight (kg) | 173 | 170 |
| Dry Weight | 158 kg / 348 lbs | - |
| Fuel Capacity | 12 Litres / 3.1 US gal | 13 Litres / 3.43 US gal |
| Oil Capacity | 2.4 Litres | - |
| Wet Weight | 173 kg / 381.4 lbs | 170 kg / 375 lbs |
| Performance |
| Top Speed | 95 mph / 152.8 km/h | - |
| Max Power | 31.5 hp / 23.5 kW @ 6500 rpm | 29.4 kW / 40hp @ 8000 rpm |
| Max Torque | 36.3 Nm / 26.8 lb-ft @ 5500 rpm | 38 Nm / 28 ft-lbs @ 6500 rpm |
| Standing Start ¼ Mile | 15.3 sec | - |
| Engine |
| Displacement | 499 cc / 30.4 cu-in | 398 cc / 24.3 cu-in |
| Engine Detail | Four stroke, single cylinder, SOHC, 2 valves per cylinder. | Four stroke, DOHC, single cylinder, 4 valves |
| Bore x Stroke | 87 х 84 mm | 89.0 x 64.0mm |
| Compression Ratio | 9.0:1 | 12.1:1 |
| Cooling System | Air cooled | Liquid cooled |
| Emissions | - | Euro 5 |
| Fuel Consumption | 63 mpg | - |
| Fuel Induction | 34mm Mikuni VM34SS carburetor | Bosch ride-by-wire EFI |
| Ignition | CDI | - |
| Starter | Kick | Electric |
| Drivetrain |
| Clutch | - | Wet multiplate with assist and slip functions |
| Final Drive | Chain | X-ring chain |
| Transmission / Drive | 5 Speed | 6-Speed |
| Chassis |
| Frame Type | Half-duplex cradle | Hybrid spine/perimeter, tubular steel, bolt-on rear subframe |
| Suspension - Front | 35mm telescopic forks | 43mm Showa Big Piston, non-adjustable inverted fork |
| Suspension - Rear | Dual shock, 5-way adjustable spring preload. | Single shock, fixed damping with the shock adjustable piggy-back reservior |
| Rake | 27.5° | 26.6° |
| Swingarm | - | Twin-sided, cast aluminium alloy |
| Trail | 117 mm / 4.6 in | 101.6 mm / 4 in |
| Wheel Travel - Front | 150 mm / 5.9 in | 139.7 mm / 5.5 in |
| Wheel Travel - Rear | 105 mm / 4.1 in | 129.4 mm / 5.1 in |
| Electrical Systems |
| Instrumentation | - | Analogue speedometer with integrated multi-function LCD screen |
| Wheels & Brakes |
| Brakes - Front | Single 200mm disc | Single 300 mm disc with radially mounted 4-piston caliper |
| Brakes - Rear | 150mm drum | Single 230 mm disc with floating caliper |
| ABS | - | Bosch dual channel |
| Tyres - Front | 3.50 S18 | 110/70 x R17 |
| Tyres - Rear | 4.00 S18 | 150/60 x R17 |
| Wheels - Front | - | 17 x 3 in with 10-spoke cast aluminium alloy rims |
| Wheels - Rear | - | 17 x 4 in with 10-spoke cast aluminium alloy rims |