Bultago Bultaco Alpina 250 (1971-79) vs Yamaha FZR 600R (1995) vs KTM 790 Duke (2022) vs Moto Guzzi V 50C (1982-86) vs Beta RS 350 (2013) vs Kawasaki ZX-R 750R-K (1991) vs Beta RS 350 (2014)
Comparison technical specifications
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| Make: | Bultago | Yamaha | KTM | Moto Guzzi | Beta | Kawasaki | Beta |
| Model: | Bultaco Alpina 250 | FZR 600R | 790 Duke | V 50C | RS 350 | ZX-R 750R-K | RS 350 |
| Years: | 1971-79 | 1995 | 2022 | 1982-86 | 2013 | 1991 | 2014 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Four stroke, parallel twin cylinder, DOHC, 4 valve per cylinder | Four stroke, V twin, longitudinally mounted, OHV, 2 valve per cylinder. | Four stroke, single cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, single cylinder | |
| Capacity: | 599 cc / 36.6 cub in. | 799 cc / 48.7 cu-in | 490 cc / 29.9 cu-in | 349 cc / 21.3 cu in | 749 cc / 45.7 cu-in | 349 cc / 21.3 cu in | |
| Bore x Stroke: | 62 x 49.6 mm | 88 mm x 65.7 mm | 74 x 57 mm | 88 x 57.4 mm | 71 x 47.3 mm | 88 x 57.4 mm | |
| Compression Ratio: | 12.0:1 | 12.7:1 | 10.4:1 | 12.1:1 | 10.8:1 | 12.1:1 | |
| Induction: | 4x 34 mm Keihin CVKD CV | DellOrto fuel-Injection | 2x 28mm Dell'Orto PHBH carburetors | Keihin FCR-MX Ø 39 mm | 4x 39 mm Keihin CVKD (Constant Velocity) carburettors / Ram Air System (single intake) | Keihin FCR-MX Ø 39 mm | |
| Ignition: | Transistor controlled digital | Bosch EMS with RBW | Battery powered inductive | DC-CDI with variable ignition timing, Kokusan. | Digital | DC-CDI with variable ignition timing, Kokusan. | |
| Starting: | Kick | Electric | Electric | Electric | Electric and kick | Electric | Electric and kick |
| Transmission: | 6 speed | 6 Speed | 5 Speed | 6 Speed | 6 Speed | 6 Speed | |
| Final Drive: | Chain | O-ring chain, 530 size, 106 links | Chain 520 X-Ring | Shaft | O-ring chain, DID | Chain | O-ring chain, DID |
| Front Suspension: | 41mm Telescopic fork preload adjustable, coil spring, oil damper | WP APEX 43 | Telehydraulic gas forks | Marzocchi USD fork, Ø 45 mm, adjustable compression and rebound, TFX technology | 41mm Upside-down forks, adjustable ride height, 13-way rebound, 8-way compression. | Marzocchi USD fork, Ø 45 mm, adjustable compression and rebound, TFX technology | |
| Front Brakes: | 2 x 298mm discs, 4 piston calipers | 2x 300mm discs, radially mounted 4 piston caliper | 2x 260mm discs | Single Ø 260 mm floating disc, 2 piston caliper | 2x 320mm discs 4 piston calipers | Single Ø 260 mm floating disc, 2 piston caliper | |
| Rear Brakes: | Single 245 mm disc, 2 piston caliper | Single 240mm disc, 2 piston floating caliper | Single 235mm disc | Single Ø 240 mm disc, 1 piston caliper | Single 230mm disc 2 piston caliper | Single Ø 240 mm disc, 1 piston caliper | |
| Front Tyre: | 120/60 ZR17 | Maxxis Supermaxx ST 170/20Z R17 | 100/90 H18 | 90/90 -21 | 120/70 ZR17 | 90/90 -21 | |
| Rear Tyre: | 160/60 ZR17 | Maxxis Supermaxx ST 182/20Z R17 | 130/90 H16 | 140/80 -18 | 180/55 ZR17 | 140/80 -18 | |
| Dry Weight: | 184 kg / 405 lbs | 169 kg / 372.5 lbs | 165 kg / 363.7 lbs | 108 kg / 240 lbs | 190 kg / 418.8 lbs | 108 kg / 240 lbs | |
| Fuel Capacity: | 19 Litres / 5.0 US gal | 14 Litres / 3.7 US gal | 15 Litres / 3.9 US gal | 7.9 L / 2.1 US gal | 18 Litres / 4.7 US gal | 7.9 L / 2.1 US gal |