Kawasaki AR 50 (1981-96) vs Yamaha YDS-7 (1972) vs Victory Hammer S (2007-08) vs BMW K 75RTA (1994) vs Ducati GT 1000 Classic (2009) vs Ducati 350GTV (1977-81)
Comparison technical specifications
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| Make: | Kawasaki | Yamaha | Victory | BMW | Ducati | Ducati |
| Model: | AR 50 | YDS-7 | Hammer S | K 75RTA | GT 1000 Classic | 350GTV |
| Years: | 1981-96 | 1972 | 2007-08 | 1994 | 2009 | 1977-81 |
| Engine: | Two stroke, single cylinder, disc valve. | Two stroke, piston-port, parallel twin | Four stroke, 50° V twin SOHC, 4 valves per cylinder | Four-stroke, horizontal three cylinder in-line, liquid cooled, DOHC, 2 valves per cylinder | Four stroke, 90° “L” twin cylinder, desmodromic 2 valves per cylinder, operated by four rocker arms (two opening rockers and 2 closing rockers) SOHC. Driven by the crankshaft through spur gears, timing belt pulleys and toothed timing belts | Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder. |
| Capacity: | 49 cc / 3.0 cu-in | 247 cc / 15.0 cu-in | 1634 cc / 100 cu-in | 740 cc / 45 cub. in. | 992 cc / 60.5 cu in | 349.6 cc / 21.3 cu in |
| Bore x Stroke: | 49 x 41.6 mm | 54 x 54 mm | 101 x 102 mm | 67 x 70 mm | 94 x 71.5 mm | 71.8 x 43.2 mm |
| Compression Ratio: | 7.8:1 | 7.5;1 | 9.8:1 | 11.0:1 | 10.0:1 | 9.6:1 |
| Induction: | Mikuni VM18SC Carburetor | 26mm Mikuni | Electronic Fuel Injection with 44mm throttle bodies | Electronic injection, Bosch LE-Jettronic | Marelli electronic fuel injection, 45mm throttle body | 2 x 26 mm Dell'Orto VHB 26 FS/FD |
| Starting: | Kick | Kick | Electric | Electric | Electric | Electric |
| Transmission: | 6 Speed | 5 Speed Helical-gear primary drive. Rear chain % x %in with top guard. Engine rpm at 30 mph in top gear, approximately 2,500. | 6 Speed | 5 speed | 6 Speed | 5-Speed |
| Final Drive: | Chain | Chain | Carbon Fiber Reinforced Belt | Shaft | Chain, gear ration:15/39 | Chain |
| Front Suspension: | Telescopic fork | 34mm Telescopic forks | 43mm Inverted cartridge telescopic fork | Telescopic fork with hydraulic shock absorber | 43 mm Marzocchi upside down fork | 35 mm Paioli fork |
| Rear Suspension: | Swingarm with monoshock | Twin shock | Single, mono-tube gas forged and cast aluminum w/ rising-rate linkage | Monolever swinging arm. | Twin shock absorbers, spring preload | Dual Marzocchi shocks, 3-way adjustable |
| Front Brakes: | Single 232mm disc | 180mm twin leading shoe drum | 2x 300mm floating rotor 4 piston caliper | 2 x ∅285mm discs, 2 piston calipers | 2x 320 mm Semi-floating discs, 4 piston calipers | 2 x 256 mm Brembo discs |
| Rear Brakes: | 130 drum | 180mm single leading shoe | Single 300mm floating rotor 2 piston caliper | Single ∅285mm disc, 1 piston caliper | Single 245 mm disc, 2 piston caliper | Single 257mm Brembo disc |
| Front Tyre: | 2.50–18 | 300 x 18 | 130/70 R18 | 100/90-V18 | 120/70 ZR17 | 3.25-18 |
| Rear Tyre: | 2.75–18 | 3.25 x 18 | 250/40 R18 | 130/90-V17 | 180/55 ZR17 | 3.50-18 |
| Fuel Capacity: | 9.8 Litres / 2.1 US gal | 11.4 Litres / 3.0 gal | 17 Litres / 4.5 US gal | 21 L / 5.5 US gal | 15 Litres / 4.0 US gal / 3.3 Imp gal | 14 L / 3.7 US gal / 3.1 Imp gal |