Aprilia RX 125 Six Days ModelM (1991-92) vs Yamaha XVS 650 V-Star Silverado (2009-10)
Comparison technical specifications
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| Make: | Aprilia | Yamaha |
| Model: | RX 125 Six Days ModelM | XVS 650 V-Star Silverado |
| Years: | 1991-92 | 2009-10 |
| Engine: | Single cylinder, two stroke, Rotax 123 with Gilardoni 2 cylinder/head | Four stroke, 70°V-twin cylinder, SOHC, 2 valve per cylinder |
| Capacity: | 124.8 cc / 7.6 cu in | 649 cc / 39.6 cu-in |
| Bore x Stroke: | 54 x 54.5 mm | 81 x 63mm |
| Compression Ratio: | 11.5:1 | 9.0:1 |
| Cooling System: | Liquid cooled | Air cooled |
| Induction: | VHSB34 LD carburetor | 2x 28mm Mikuni BDS28 CV carburetors |
| Starting: | Kick | Electric |
| Max Power: | 25.7 kW / 34.5 hp @ 10800 rpm | 40 hp / 29.2 kW @ 6500 rpm |
| Max Torque: | 20.6 Nm / 2.1 kgf-m / 15.2 lb-ft @ 10500 rpm | 50.9 Nm / 37.5 lb-ft @ 3000 rpm |
| Transmission: | 6 Speed | 5 Speed |
| Final Drive: | #520 Chain, 12T to 17T pinion gear, 49T spur gear | Shaft |
| Front Suspension: | Marzocchi upside down fork | 41mm forks |
| Rear Suspension: | Swingarm with single shock absorber, Aprilia Progressive System with fully adjustable Boge Sachs shock absorber | Adjustable link Monocross |
| Front Brakes: | Single disc, 250 mm | Single 298mm disc |
| Rear Brakes: | Single disc, 220 mm | 200mm Drum |
| Front Tyre: | 90/90-21 | 130/90-16 |
| Rear Tyre: | 120/90-18 | 170/80-15 |
| Fuel Capacity: | 9 L / 2.4 US gal / 2.0 Imp gal | 16 Liters / 4.2 US gal |