Aprilia RS 660 / Factory (2025) vs Velocette Venom Scrambler (1958) vs Kawasaki Z 650 (2022)
Comparison technical specifications
Add bike |
Remove bike |
Remove bike |
Remove bike |
| Make: | Aprilia | Velocette | Kawasaki |
| Model: | RS 660 / Factory | Venom Scrambler | Z 650 |
| Years: | 2025 | 1958 | 2022 |
| Engine: | Four stroke, forward facing parallel twin, DOHC with silent chain drive on the right side, four valves per cylinder | Four stroke, single cylinder | Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 659 cc / 40.2 cu-in | 499 cc / 30.5 cub in | 649 cc / 39.65 cu-in |
| Bore x Stroke: | 81 x 63.93 mm | 86 x 86 mm | 83 x 60 mm |
| Compression Ratio: | 13.5: 1 | 8.75:1 | 10.8:1 |
| Cooling System: | Liquid cooled with radiator and water-oil heat exchanger | Air cooled | Liquid cooled |
| Lubrication: | Wet sump | Dry sump | Wet sump |
| Starting: | Electric | Kick start | Electric |
| Max Power: | 105 hp / 73.5 kW @ 10500 rpm | 28.7 kW / 39 hp @ 6200 rpm | 50.2 kW / 67.3 hp |
| Transmission: | 6 Speed, Aprilia Quick Shift (AQS) System up and down (available as optional accessory) | 4 Speed constant mesh, close ratio | 6 Speed |
| Final Drive: | Chain, with drive ratio: 17/43 | Chain | Sealed chain |
| Frame: | Twin-spar aluminum half frame | Tubular cradle, rear sub-frame detachable | Trellis, high-tensile steel |
| Front Suspension: | RS: ? 41 mm Kayaba USD fork, rebound and preload adjustable RS Factory: 43mm ?hlins NIX 30 fork, spring preload, rebound and compression damping adjustable | Telescopic fork with hydraulic damping and an offset wheel spindle | 41 mm hydraulic telescopic fork |
| Rear Suspension: | RS: Kayaba monoshock, rebound and preload adjustable?hlins STX rear shock, spring preload, rebound and compression damping adjustable RS Factory: ?hlins monoshock, fully adjustable | Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling | Horizontal Back-link with adjustable preload swingarm |
| Front Brakes: | 2x 320mm Brembo radial calipers with 4 horizontally opposed 32 mm pistons. Radial pump and metal braided brake hose | 7 x 1 in. drum | 2x 300mm petal-style discs, 2 piston calipers |
| Rear Brakes: | Single 220mm disc; Brembo caliper with two 34 mm separate pistons. Master cylinder with separate reservoir and metal braided hose Multimap ABS (Cornering ABS available as optional accessory) | 7 x 1 in. drum | Single 220mm petal-style disc |
| Front Tyre: | 120/70 ZR 17 | 3.25 x 19 in or 3.00 x 21 in knobbies, Avon or Dunlop | 120/70 ZR17 |
| Rear Tyre: | 180/55 ZR 17 | 4.00 x 19 in knobbies, Avon or Dunlop | 160/60 ZR7 |
| Wheelbase: | 1382 mm / 54.4 in | 1365 mm / 53.75 in | 1410 mm / 55.5 in |
| Seat Height: | 822 mm / 32.3 in | 838 mm / 33 in | 790 mm / 31.1 in |
| Fuel Capacity: | 15 Litres / 4.0 US gal | 11.35 L / 3 US gal | 15 Litres / 4.0 US gal |