Yamaha XS 750 (1977) vs Moto Guzzi 850GT (1972-) vs Vespa 150 TAP (1956and1959) vs BMW G 650 Moto (2008)
Comparison technical specifications
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| Make: | Yamaha | Moto Guzzi | Vespa | BMW |
| Model: | XS 750 | 850GT | 150 TAP | G 650 Moto |
| Years: | 1977 | 1972- | 1956and1959 | 2008 |
| Engine: | Four stroke, transverse three cylinder, DOHC, 2 valves per cylinder. | Four stroke, 90° V twin, longitudinally mounted, OHV, 2 valve per cylinder | Two strike, single cylinder | Four stroke, single cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 747 cc / 45.6 cu in | 844 cc / 51.5 cu-in | 145.5 cc / 8.8 cub in | 652 cc / 39.8 cub in. |
| Bore x Stroke: | 68 x 68.6 mm | 83 x 78 mm | 58.5 x 54 mm | 100 x 83 mm |
| Ignition: | Battery and coil | Battery with double contact breaker with automatic advance | 6 pole flywheel magneto | Capacitor Discharge Ignition System |
| Starting: | Electric | Electric | Kick start | Electric |
| Final Drive: | Shaft | Shaft | Direct drive | Chain |
| Front Suspension: | Telescopic forks, 36 mm | Telescopic forks | Helicoidal spring and hydraulic shock absorber | ∅45mm Upside-down telescopic fork |
| Rear Suspension: | Dual shocks swing arm, preload adjustable | Dual shocks | Helicoidal spring and hydraulic shock absorber | Aluminum 2-unit cast swing arm, air damping |
| Front Brakes: | 2 x 267mm Discs | Single 300mm disc | Drum, expanding type | Single ∅320mm disc, 4 piston calipers |
| Rear Brakes: | Single 267mm disc | Drum | Drum, expanding type | Single ∅240mm disc, 1 piston caliper |
| Front Tyre: | 3.25-19 | 4.00-18 | 3.5 x 8" | 120/70-H17 |
| Rear Tyre: | 4.00-18 | 4.00-18 | 3.5 x 8" | 160/60-H17 |
| Dry Weight: | 231 kg / 470 lbs | 211 kg / 465 lbs | 115 kg / 253 lbs | 147 kg / 324 lbs. |