Aprilia RS 660 / Factory (2025) vs Indian Springfield Special Edition (2025)
Comparison technical specifications
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| Make: | Aprilia | Indian |
| Model: | RS 660 / Factory | Springfield Special Edition |
| Years: | 2025 | 2025 |
| Engine: | Four stroke, forward facing parallel twin, DOHC with silent chain drive on the right side, four valves per cylinder | Thunder Stroke 116, 49˚ V-Twin |
| Capacity: | 659 cc / 40.2 cu-in | 1890 cc / 115 cub in |
| Bore x Stroke: | 81 x 63.93 mm | 103.2 x 113 mm |
| Compression Ratio: | 13.5: 1 | 11.0:1 |
| Exhaust: | Akrapovič - for race use only | Split dual exhaust with crossover |
| Induction: | Airbox with front air intake. 2 x 52 mm throttle bodies, Ride-By-Wire management | Electronic fuel injection, closed loop, 54 mm bore |
| Starting: | Electric | Electric |
| Clutch: | Wet, multi-plate, slipper | Wet, multi-plate |
| Transmission: | 6 Speed, Aprilia Quick Shift (AQS) System up and down (available as optional accessory) | 6 Speed |
| Final Drive: | Chain, with drive ratio: 17/43 | Belt, 152 tooth |
| Frame: | Twin-spar aluminum half frame | High tensile steel, monoshock |
| 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 | 46mm Telescopic forks |
| Front Wheel Travel: | 120 mm / 4.7 in | 119 mm / 4.7 in |
| 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 | Single shock with air adjust |
| Rear Wheel Travel: | 130 mm / 5.1 in | 114 mm / 4.5 in |
| Front Brakes: | 2x 320mm Brembo radial calipers with 4 horizontally opposed 32 mm pistons. Radial pump and metal braided brake hose | 2 x 300mm Floating rotor, 4 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) | Single 300mm floating rotor, 2 piston caliper |
| Front Wheel: | 3.5 x17 | Cast 17″ x 3.5″ Machined highlights |
| Rear Wheel: | 5.5 x17 | Cast 16″ x 5.0″ Machined highlights |
| Front Tyre: | 120/70 ZR 17 | 130/60B19 65H Metzeler Cruisetec |
| Rear Tyre: | 180/55 ZR 17 | 180/60R16 80H Metzeler Cruisetec |
| Rake: | 24.3? | 25? |
| Trail: | 104.1 mm / 4.1 in | 133 mm / 5.2 in |
| Wheelbase: | 1382 mm / 54.4 in | 1701 mm / 67 in |
| Seat Height: | 822 mm / 32.3 in | 660 mm / 26 in |
| Fuel Capacity: | 15 Litres / 4.0 US gal | 20.8 Litres / 5.5 US gal |