Aprilia SL 750 Shiver (2015-16) vs Aprilia SMV 900 Dorsoduro (2018) vs Aprilia RC 125 (1977-82) vs Aprilia RS4 125 (2019-20) vs Aprilia RX 125 Six Days ModelM (1991-92)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Aprilia | Aprilia | Aprilia |
| Model: | SL 750 Shiver | SMV 900 Dorsoduro | RC 125 | RS4 125 | RX 125 Six Days ModelM |
| Years: | 2015-16 | 2018 | 1977-82 | 2019-20 | 1991-92 |
| Engine: | Four stroke, longitudinal 90°V twin, DOHC, 4 valves per cylinder | Four stroke, longitudinal 90°V twin, DOHC, with mixed gear/chain timing system,4 valves per cylinder | Single cylinder, two stroke | Four stroke, single cylinder, DOHC, 4 valves | Single cylinder, two stroke, Rotax 123 with Gilardoni 2 cylinder/head |
| Capacity: | 749 cc / 45.7 cu-in | 896.1 cc / 54.6 cu-in | 125 cc / 7.6 cu in | 124.8 cc / 7.6 cu in | 124.8 cc / 7.6 cu in |
| Cooling System: | Liquid cooled | Liquid cooled | Air cooled | Liquid cooled | Liquid cooled |
| Induction: | Integrated engine management system. Injection with Ride by Wire technology control of the throttle bodies | Integrated engine management system. Injection with 3-map Ride- by-wire throttle valve opening management (Sport, Touring, Rain) | Carburetor | Magneti Marelli M3G ø 32mm ECU | VHSB34 LD carburetor |
| Starting: | Electric | Electric | Kick | Electric | Kick |
| Max Power: | 69.3 kW / 95 hp @ 9000 rpm | 70.0 kW / 95.2 hp @ 8750 rpm | 17.2 kW / 23 hp @ 10 000 rpm | 11.7 kW / 16 hp @ 10500 rpm | 25.7 kW / 34.5 hp @ 10800 rpm |
| Transmission: | 6 Speed | 6 Speed | 6 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain Transmission ratio: 16/44 | Chain | Chain | Chain: 60/13 (4.61) | #520 Chain, 12T to 17T pinion gear, 49T spur gear |
| Front Suspension: | Ø43 mm upside-down fork. | Upside-down fork, stanchions Æ 41 mm. Adjustable hydraulic rebound damping and spring preload. | Telescopic fork | Ø41 mm Upside down fork | Marzocchi upside down fork |
| Rear Suspension: | Aluminium alloy swingarm with reinforcement truss. Hydraulic shock absorber adjustable in spring preload and rebound damping. | Aluminum alloy swingarm. Hydraulic shock absorber with adjustable extension and spring preload | Swingarm, dual shocks with coil springs | Asymmetric swingarm with monoshock | Swingarm with single shock absorber, Aprilia Progressive System with fully adjustable Boge Sachs shock absorber |
| Front Brakes: | 2 x Ø320 mm discs, 4 piston caliper | 2 x 320 mm discs, stainless floating discs. Radial, four-piston callipers. Metal braided brake hose | Drum | Single 300 mm disc, 4 piston caliper | Single disc, 250 mm |
| Rear Brakes: | Single Ø245 mm disc, 2 piston caliper | Single 240 mm disc, Single piston calliper. Metal braided line. | Drum | Single 218 mm disc, 1 piston caliper | Single disc, 220 mm |
| Front Tyre: | 120/70 ZR17 | 120/70 ZR17 | 21 in | 110/80 17 | 90/90-21 |
| Rear Tyre: | 180/55 ZR17 | 180/55 ZR17 | 18 in | 130/70 17 | 120/90-18 |