Beta RS 400 (2014) vs Moto Guzzi V7 III Special (2017-18) vs Kawasaki AR 125 (1984-85) vs Kawasaki KX 500 (1991-92)
Comparison technical specifications
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| Make: | Beta | Moto Guzzi | Kawasaki | Kawasaki |
| Model: | RS 400 | V7 III Special | AR 125 | KX 500 |
| Years: | 2014 | 2017-18 | 1984-85 | 1991-92 |
| Engine: | Four stroke, single cylinder, 4 valve | Four stroke, V twin, longitudinally mounted, OHV, 2 valves with light alloy pushrods and rockers | Two stroke, single cylinder, disc valve. | Two stroke, single cylinder, read valve |
| Capacity: | 398 cc / 24.3 cu in | 744 cc / 45.4 in | 124 cc / 7.5 cu-in | 499 cc / 30.5 cu-in |
| Bore x Stroke: | 95 x 56.2 mm | 80 x 74 mm | 55 х 51.8 mm | 86 x 86mm |
| Compression Ratio: | 12.4:1 | 9.6:1 | 6.5:1 | 8.4:1 |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled | Liquid cooled |
| Induction: | Keihin FCR-MX, Ø 39mm | Weber- Marelli electronic injection | 24mm Mikuni carburetor | KeihinPWK39 carburetor |
| Ignition: | DC-CDI with variable ignition timing, Kokusan. | Magneti Marelli electronic digital | Capacitor discharge | Electronic CDI |
| Starting: | Electric and Kick | Electric | Kick | Kick |
| Transmission: | 6 Speed | 6 Speed | 6 Speed | 5 Speed |
| Final Drive: | O-ring chain, DID | Shaft | Chain | Chain |
| Front Suspension: | Sachs USD fork, Ø 48 mm, adjustable compression and rebound, TFX technology, | Marzocchi Ø 40 mm telescopic front forks | 30mm Leading telescopic | 41mm upside-down cartridge fork with 20-way compression and 20-way rebound damping |
| Rear Suspension: | Sachs shock w/adjustable rebound and hi/low speed compression, | Die-cast alloy swing arm with 2 shocks with adjustable spring preload (Öhlins fully adjustable for Racer) | Rising rate Uni-trek linkage 5-way preload. | Bottom-Link UN'1-TKAK with adjustable preload and 20-way compression and 20-way rebound damping |
| Front Brakes: | Single Ø 260 mm floating disc, 2 piston caliper | Single 320mm disc 2 piston caliper | Single 232mm disc 1 piston caliper | Single 220mm disc |
| Rear Brakes: | Single Ø 240mm disc, 1 piston caliper | Single 260mm disc 2 piston caliper | 130 drum | Single 190mm disc |
| Front Tyre: | 90/90 -21 | 18″ | 2.75-18 | 80/100-21 51M |
| Rear Tyre: | 140/80 -18 | 17″ | 3.00-18 | 120/90-18 64M |
| Fuel Capacity: | 7.9 L / 2.1 US gal | 21 Litres / 5.5 US gal | 11.5 Litres / 3.0 US gal | 9.8 Litres / 2.6 US gal |