Suzuki GN 400E (1980) vs Yamaha XJ 750E-II (1983) vs Ducati Diavel Black Diamond (2011) vs Harley-Davidson Harley Davidson FLHTK Electra Glide Ultra Limited (2013) vs Gilera RRT 125 (1987-)
Comparison technical specifications
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| Make: | Suzuki | Yamaha | Ducati | Harley-Davidson | Gilera |
| Model: | GN 400E | XJ 750E-II | Diavel Black Diamond | Harley Davidson FLHTK Electra Glide Ultra Limited | RRT 125 |
| Years: | 1980 | 1983 | 2011 | 2013 | 1987- |
| Engine: | Four stroke, single cylinder, SOHC, 4 valves | Four stroke, transverse four cylinder, DOHC, 2 valves per cylinder | Four stroke, 90° “L” twin cylinder, DOHC, desmodromic 4 valves per cylinder. | Four stroke, Twin Cam 103™ with integrated oil cooler Valves Pushrod-operated, overhead valves with hydraulic, self-adjusting lifters; two valves per cylinder | Two stroke, single cylinder |
| Capacity: | 396 cc / 24.2 cu in | 749 cc / 45.6 cu-in | 1198.4 cc / 73.1 cu in | 1690 cc / 103.1 cub in. | 124 cc / 7.6 cu-in |
| Bore x Stroke: | 88 х 65.2 mm | 65 х 56.5 mm | 106 x 67.9 mm | 98.4 x 111.25 mm | 56 x 50 mm |
| Compression Ratio: | 9.3:1 | 9.8:1 | 11.5:1 | 10.0:1 | 13.0:1 |
| Cooling System: | Air cooled | Air cooled | Liquid cooled | Air/Liquid cooled, | Liquid cooled, |
| Induction: | 36mm Mikuni | HSC33 carburetors | Mitsubishi electronic fuel injection system, Mikuni elliptical throttle bodies with RbW | Electronic Sequential Port Fuel Injection (ESPFI) | Dell'Orto premix carburetor |
| Starting: | Kick | Electric | Electric | Electric | Kick |
| Max Torque: | 29.4 Nm / 3.0 kgf-m / 21.7 lb-ft @ 5000 rpm | 7.1 kgf-m / 51.3 lb-ft @ 7000 rpm | 127.5 Nm / 13.0 kgf-m / 94 lb-ft / @ 8000rpm | 143 Nm / 105.4 ft/lb @ 3750 rpm | 1.5 kgf-m @ 10500 rpm |
| Transmission: | 5 Speed | 5 Speed | 6 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain | Shaft | Chain Front sprocket 15; Rear sprocket 43 | Belt | Chain |
| Front Suspension: | Telescopic fork | 36mm Showa forks adjustable air pressure anti-dive resistance | Marzocchi 50mm fully adjustable USD forks | 41.3 mm telescopic, cartridge-style damping | Telescopic forks |
| Rear Suspension: | Dual shocks | Dual dampers adjustable for spring preload rebound damping | Progressive linkage with fully adjustable Sachs monoshock. Aluminium single-sided swingarm, | Swingarm Mild steel; two-piece drawn and welded section; forged junctions; MIG welded, Rear Shocks Air-adjustable | Alloy swing arm gas single shock |
| Front Brakes: | Single disc | 2x 300mm disc 2 piston calipers | 2 x 320 mm Semi-floating discs, radially mounted Monobloc Brembo calipers, 4-piston with ABS | 2x 300mm disc 4 piston caliper ABS | Single 240mm disc |
| Rear Brakes: | Drum | Single disc | Single 265 mm disc, 2-piston floating caliper with ABS | Single 300mm disc 4 piston caliper ABS | Drum |
| Front Tyre: | 3.60-18 | 100/90-18 | 120/70 ZR 17 | BW 130/80B17 65H | 2.75-21 |
| Rear Tyre: | 4.60-16 | 120/90-18 | 240/45 ZR17 | BW 180/65B16 81H | 4.60-17 |
| Fuel Capacity: | 11.5 Litres / 3.0 US gal / 2.5 Imp gal | 22 Litres / 5.8 US gal | 17 Litres / 4.5 US gal / 3.7 Imp gal | 22.7 Litres / 6.0 US gal | 15 Litres / 3.9 US gal |