Triumph TT600 (2003) vs KTM 390 SMC R (2025) vs Yamaha XZ 550 Vision (1982-83)
Comparison technical specifications
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| Make: | Triumph | KTM | Yamaha |
| Model: | TT600 | 390 SMC R | XZ 550 Vision |
| Years: | 2003 | 2025 | 1982-83 |
| Engine: | Four stroke, transverse four cylinder. DOHC, 4 valves per cylinder. | Four stroke, single cylinder, DOHC with finger followers, 4 valves | Four stroke, 70°V-twin cylinder. DOHC, 4 valve per cylinder |
| Capacity: | 599 cc / 36.6 cu in | 398.7 cc / 24.3 cu-in | 552 cc / 33.7 lb-ft |
| Bore x Stroke: | 68 x 41.3 mm | 89 x 64 mm | 80 х 55 mm |
| Cooling System: | Liquid cooled | Liquid Cooled | Liquid cooled |
| Compression Ratio: | 12.5:1 | 12.6:1 | 10.4:1 |
| Induction: | Multipoint sequential electronic fuel injection with forced air induction | Bosch fuel injection, 46 mm throttle body | 2x 36mm Mikuni carburetors |
| Starting: | Electric | Electric | Electric |
| Max Power: | 80.2 kW / 110 hp @ 12750 rpm | 33 kW / 44.3 hp @ 8500 rpm | 64 hp / 46.7 kW @ 9500 rpm |
| Max Torque: | 68 Nm / 6.93 kg-m / 50.2 ft-lb @ 11000 rpm | 39 Nm / 28.7 lb-ft @ 7000 rpm | 4.8 kgf-m / 34.7 lb-ft @ 8500 rpm |
| Transmission: | 6 Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain 520-X Ring | Shaft |
| Front Suspension: | 43mm forks with dual rate springs and adjustable preload, compression and rebound damping | 43mm WP APEX 43, open cartridge, compression and rebound adjustable | Telescopic oil damped forks |
| Rear Suspension: | Monoshock with adjustable preload, compression and rebound damping | WP APEX - Monoshock, split piston, rebound and preload adjustable | Gas filled monoshock, 2-way adjustable. |
| Front Brakes: | 2x 310 mm Discs, 4 piston calipers | Single 320 mm disc, Bybre 2 piston radial caliper | 2x 266mm discs |
| Rear Brakes: | Single 220mm disc, 1 piston caliper | Single 240 mm disc, Bybre 1 piston floating caliper | Single 177mm drum |
| Front Tyre: | 120/70 ZR17 | 110/70 R17 | 100/90-18 |
| Rear Tyre: | 180/55 ZR17 | 150/60 R17 | 110/90-18 |
| Fuel Capacity: | 18 Litres / 4.8 US gal / 4.0 Imp gal | 9 L / 2.4 US gal | 17 Litres / 4.4 US gal |