Moto Guzzi California Stone Metal (2002) vs Suzuki GSX-R 1000R Team Classic Replica (2018) vs Harley-Davidson Aermacchi / Harley Davidson SST 250 (1978-) vs Yamaha XJ 400D (1981)
Comparison technical specifications
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| Make: | Moto Guzzi | Suzuki | Harley-Davidson | Yamaha |
| Model: | California Stone Metal | GSX-R 1000R Team Classic Replica | Aermacchi / Harley Davidson SST 250 | XJ 400D |
| Years: | 2002 | 2018 | 1978- | 1981 |
| Engine: | Four stroke, 90° V twin, longitudinally mounted, OHV, 2 valve per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder, TSCC | Two stroke, single cylinder | Four stroke, transverse four cylinder. DOHC |
| Capacity: | 1064 cc / 64.9 cu-in | 998.6 cc / 60.9 cub-in | 242.6 cc / 14.8 cu-in | 398 cc / 24.2 cu-in |
| Bore x Stroke: | 92 x 80 mm | 76.0 X 55.1 mm | 72 x 59.6 mm | 51 х 48.8 mm |
| Cooling System: | Air cooled | Liquid cooled | Air cooled | Air cooled |
| Compression Ratio: | 9.8:1 | 13.2:1 | 10.3:1 | 9.7:1 |
| Induction: | Magneti Marelli IAW Multipoint phased sequential fuel injection | Fuel Injection | 1x 32mm Dell'Orto carburetor | 2x 34mm Mikuni carburetor |
| Ignition: | Magneti Marelli IAW electronic digital ignition | Electronic ignition Transistorized | Battery & coil later moeel Electronic CDI | Battery powered inductive |
| Starting: | Electric | Electric | kick | Electric |
| Max Power: | 74 hp / 53.9 kW @ 6400 rpm | 148.6 kW / 199.2 hp @ 13200rpm | 17 HP / 12.4 kW @ 7000 rpm | 45 hp / 32.8 kW @ 10000 rpm |
| Transmission: | 5 Speed | 6 Speed, constant mesh | 5 Speed | 6 Speed |
| Final Drive: | Shaft | Chain, DID50VAZ, 114 links | Chain | Chain |
| Front Suspension: | 45mm Marzocchi hydraulic telescopic fork, adjustable separately | Inverted telescopic, coil spring, oil damped | Oil damper Ceriant telescopic fork | 35mm Telescopic forks |
| Rear Suspension: | Swing arm with 2 hydraulic shock absorbers with preload adjustment | Link type, coil spring, oil damped | Pivoted fork and Betor dampers 3-way adjustment | Single shock, adjustable spring preload |
| Front Brakes: | 2x 320mm discs 4 piston calipers | 2 x 320mm Discs radial mount Brembo 4-piston calipers | Single disc | Single disc 1 piston caliper |
| Rear Brakes: | Single 282mm disc 2 piston caliper | Single 220mm disc, Nissin,1-piston | Drum | Drum |
| Front Tyre: | 110/90-18 | 120/70ZR17M/C (58W) tubeless | 3.25 -19 | 3.00-19 |
| Rear Tyre: | 140/80-17 | 190/50 ZR17 M/C (73W), tubeless | 4.00 -18 | 110 90-18 |
| Fuel Capacity: | 19 Litres / 5.0 US gal | 16 Litres / 3.5 US gal | 10.5 Litres / 2.7 US gal | 15 Litres / 3.9 US gal |