Yamaha TT 500 (1978-81) vs Honda VFR 800X Crossrunner (ED-type) (2014) vs Ducati 900SS (1989-90) vs BMW R 90/6 (1973-76) vs Yamaha DT 400 (1978-79)
Comparison technical specifications
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| Make: | Yamaha | Honda | Ducati | BMW | Yamaha |
| Model: | TT 500 | VFR 800X Crossrunner (ED-type) | 900SS | R 90/6 | DT 400 |
| Years: | 1978-81 | 2014 | 1989-90 | 1973-76 | 1978-79 |
| Engine: | Four stroke, single cylinder | Four stroke, 90° V-4, SOHC, 4 valve per cylinder | Four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valves per cylinder, belt driven | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Two stroke, single cylinder, read valve |
| Capacity: | 499 cc / 30.4 cu-in | 782 cc / 47.7 cu-in | 904 cc / 55.2 cu in | 898 cc / 54.8 cu in. | 397 cc / 24.2 cu-in |
| Bore x Stroke: | 87 х 84 mm | 72 x 48 mm | 92 x 68 mm | 90 x 70.6 mm | 85 Ñ… 70 mm |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Air cooled | Air cooled |
| Compression Ratio: | 9.0 :1 | 11.6:1 | 9.2:1 | 9.0:1 | 6.4:1 |
| Induction: | 38mm Mikuni | PGM-FI electronic fuel injection, 35mm Throttle Bore | Weber 44DCNF 118 | 2 x Bing constant depression carburetors | Single 28mm Mikuni carburetor |
| Ignition: | Flywheel magneto | Computer-controlled digital transistorised with electronic advance | Electronic inductive discharge | Battery ignition | CDI |
| Starting: | Kick | Electric | Electric | Electric | Kick |
| Max Power: | 27 hp / 19.7 kW @ 5900 rpm | 74.9 kW / 100.6 hp @ 10000 rpm | 61.8 kW / 84 hp @ 7000 rpm (rear tyre 53.7 kW / 73hp @ 8100 rpm) | 44.1 kW / 60 hp @ 6500 rpm | 23 hp / 17.1 kW @ 5500 rpm |
| Max Torque: | 27.8 ft-lb / 37.6 Nm @ 5500 rpm | 72.8 Nm / 7.34 kg-m @ 9500 rpm | 84 Nm / 8.6 kgf-m / 62 ft-lb @ 6400 rpm | 73 Nm / 7.44 kgf-m / 53 ft lb @ 5500 rpm | 3.8 kg-m / 27.5 lb-ft @ 5000 rpm |
| Transmission: | 5 Speed | 6 Speed | 6 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain | Shaft | Chain |
| Front Suspension: | Telescopic fork | 43mm cartridge-type telescopic fork with stepless preload adjustment, | 40mm Marzocchi fully adjustable inverted fork | Telescopic hydraulic forks. | Telescopic forks |
| Rear Suspension: | Swinging arm | Pro-Link with gas-charged HMAS damper, 7-step preload and stepless rebound damping adjustment, | Progressive type with adjustable Marzocchi monoshock | Long swinging arm with adjustable strut. | Swinging arm fork |
| Front Brakes: | Drum | 2x Hydraulic discs 320mm floating, 6-piston radial calipers, Combined-ABS | 2 x 320mm discs | Single ∅260mm disc, 1 piston caliper | Drum |
| Rear Brakes: | Drum | Single hydraulic 276mm disc 2 piston caliper, Combined-ABS | Single 245mm disc | 200mm Drum | Drum |
| Front Tyre: | 3.00-21 | 120/70 Z R17 | 120/70-17 | 3.25 - H19 | 3.00-21 |
| Rear Tyre: | 4.60-18 | 180/55 R17 | 170/60-17 | 4.00 - H18 | 4.00-18 |
| Fuel Capacity: | 8.5 Litres / 2.24 US gal | 21.5 Litres / 5.6 gal | 17.5 L / 4.6 US gal / 3.8 Imp gal | 18 Liters / 4.75 US gal | 9 Litres / 2.3 US gal |