Aprilia RX50 (2010-12) vs Aprilia RX 125C (1993-94) vs Aprilia RX 125 Six Days ModelM (1991-92) vs MV Agusta Brutale 1090 (2015) vs Kawasaki Z-X10R Ninja (2010)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Aprilia | MV Agusta | Kawasaki |
| Model: | RX50 | RX 125C | RX 125 Six Days ModelM | Brutale 1090 | Z-X10R Ninja |
| Years: | 2010-12 | 1993-94 | 1991-92 | 2015 | 2010 |
| Engine: | Single cylinder, two stroke | Single cylinder, two stroke, Rotax 123, Gilardoni 2 cylinder/head | Single cylinder, two stroke, Rotax 123 with Gilardoni 2 cylinder/head | Four stroke, transverse four cylinder. DOHC, 4 radial valves per cylinder | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 49.9 cc / 3.04 cu in | 124.8 cc / 7.6 cu in | 124.8 cc / 7.6 cu in | 1078 cc / 65.7 cu-in | 998 cc / 60.9 cu-in |
| Bore x Stroke: | 39.9 x 40 mm | 54 x 54.5 mm | 54 x 54.5 mm | 79 x 55 mm | 76 x 55 mm |
| Compression Ratio: | 11.5:1 | 12.5:1 | 11.5:1 | 13.0;1 | 12.7:1 |
| Induction: | Dell'Orto PVHA 17.5 carburetor | VHSB34 LD carburetor | VHSB34 LD carburetor | Engine management system Magneti Marelli IAW 5SM ignition - injection integrated system with Mikuni throttle body; induction discharge electronic ignition; sequential timed "Multipoint" electronic injection | DFI with 43mm Keihin throttle bodies with oval sub-throttles, two injectors per cylinder |
| Starting: | Kick | Kick | Kick | Electric | Electric |
| Transmission: | 6 speed | 6 Speed | 6 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain | #520 Chain, 12T to 17T pinion gear, 49T spur gear | #520 Chain, 12T to 17T pinion gear, 49T spur gear | Chain | Sealed chain |
| Front Suspension: | Hydraulic fork, Ø 40 mm | Marzocchi upside down fork | Marzocchi upside down fork | 50mm Marzocchi "UPSIDE - DOWN" telescopic hydraulic fork with external and separated adjustment of rebound and compression damping and of spring preload Travel on leg axis | 43mm inverted fork with DLC coating, adjustable rebound and compression damping, spring preload adjustability and top-out springs |
| Rear Suspension: | High strength steel swingarm, hydraulic monoshock | Swingarm with single shock absorber, Aprilia Progressive System with fully adjustable Boge Sachs shock absorber | Swingarm with single shock absorber, Aprilia Progressive System with fully adjustable Boge Sachs shock absorber | Type Progressive, single shock absorber with rebound damping and spring preload adjustment Single sided swing arm: material Aluminium alloy | Bottom-Link Uni-Trak® with top-out spring, stepless, dual-range (high/low-speed) compression damping, stepless rebound damping, fully adjustable spring preload |
| Front Brakes: | Single stainless steel disc, Ø 260 mm, floating caliper | Single Ø 250 mm disc | Single disc, 250 mm | 2x 310mm discs 4 piston caliper | 2x 310mm discs 4 piston calipers |
| Rear Brakes: | Single disc, Ø 180 mm, floating caliper | Single Ø 220mm disc | Single disc, 220 mm | Single 210mm disc 4 piston caliper | Single 220 mm disc 1 piston caliper |
| Front Tyre: | 90/90-21 | 90/90-21 | 90/90-21 | 120/70 ZR 17 | 120/70 ZR17 |
| Rear Tyre: | 110/80-18 | 120/80-19 | 120/90-18 | 190/55 ZR 17 | 190/55 ZR17 |
| Fuel Capacity: | 7 L / 1.85 US gal | 11.5 L / 3.o US gal | 9 L / 2.4 US gal / 2.0 Imp gal | 23 Litres / 6.0 U.S. gal | 17 Litres / 4.4 us GAL |