Triumph TT600 (2002-03) vs Harley-Davidson Harley Davidson XLH 1000 Sportster (1983-85) vs Harley-Davidson Harley Davidson XLH 900 Sportster (1969-71) vs Yamaha RD 400 (1977)
Comparison technical specifications
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| Make: | Triumph | Harley-Davidson | Harley-Davidson | Yamaha |
| Model: | TT600 | Harley Davidson XLH 1000 Sportster | Harley Davidson XLH 900 Sportster | RD 400 |
| Years: | 2002-03 | 1983-85 | 1969-71 | 1977 |
| Engine: | Four stroke, transverse four cylinder. DOHC, 4 valves per cylinder. | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder. | Four stroke, 45° V-Twin, OHV, 2 valves per cylinder. | Two stroke, parallel twin cylinder, reed-valve torque induction |
| Capacity: | 599 cc / 36.6 cu in | 997 cc / 60.8 cu-in | 882 cc / 53.8 cu-in | 398 cc / 24.2 cu-in |
| Bore x Stroke: | 68 x 41.3 mm | 81.0 x 96.8 mm | 76.2 x 96.8 mm | 64 х 62 mm |
| Cooling System: | Liquid cooled | Air cooled | Air cooled | Air cooled |
| Compression Ratio: | 12.5:1 | 9.0:1 | 9.0:1 | 6.2:1 |
| Induction: | Multipoint sequential electronic fuel injection with forced air induction | Single 34mm Keihin carburetor | Single 1.625 in., Williston | 2x 28mm Mikuni carburetors |
| Ignition: | Digital | Electronic | Magnetic | Battery, dual coils, breaker points |
| Starting: | Electric | Electric | Kick | Kick |
| Max Power: | 80.2 kW / 110 hp @ 12750 rpm | 57 hp / 41.6 kW @ 5800 rpm | 65 hp / 47.4 kW @ 6800 rpm | 44 hp / 32.3 kW @ 7500 rpm |
| Max Torque: | 68 Nm / 6.93 kg-m / 50.2 ft-lb @ 11000 rpm | NA | NA | 41.1 Nm / 4.2 kgf-m @ 7000 rpm |
| Transmission: | 6 Speed | 4 Speed | 4 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Chain | Chain |
| Front Suspension: | 43mm forks with dual rate springs and adjustable preload, compression and rebound damping | 35mm Showa tubs diameter 193mm wheel travel. | Cartridge | Telescopic forks |
| Rear Suspension: | Monoshock with adjustable preload, compression and rebound damping | Dual Showa shocks spring preload adjustable, 76mm wheel travel. | Dual shocks swinging arm fork | Swing arm, dual shocks |
| Front Brakes: | 2x 310 mm Discs, 4 piston calipers | Single 285mm disc | 200mm drum | Single 267mm disc |
| Rear Brakes: | Single 220mm disc, 1 piston caliper | Single 285mm disc | 200mm drum | Single 267mm disc |
| Front Tyre: | 120/70 ZR17 | MJ 90-19 | 3.75-19 | 3.00S-18 |
| Rear Tyre: | 180/55 ZR17 | MT 90-19 | 4.25-18 | 3.50S-18 |
| Fuel Capacity: | 18 Litres / 4.8 US gal / 4.0 Imp gal | 9 Litres / 2.3 US gal | 8.5 Litres / 2.2 US gal | 16.5 Litres / 4.3 US gal |