Aprilia RX50 (2010-12) vs Aprilia RX 125C (1993-94) vs Aprilia RX 125 Six Days ModelM (1991-92)
Comparison technical specifications
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| Make: | Aprilia | Aprilia | Aprilia |
| Model: | RX50 | RX 125C | RX 125 Six Days ModelM |
| Years: | 2010-12 | 1993-94 | 1991-92 |
| 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 |
| Capacity: | 49.9 cc / 3.04 cu in | 124.8 cc / 7.6 cu in | 124.8 cc / 7.6 cu in |
| Bore x Stroke: | 39.9 x 40 mm | 54 x 54.5 mm | 54 x 54.5 mm |
| Compression Ratio: | 11.5:1 | 12.5:1 | 11.5:1 |
| Induction: | Dell'Orto PVHA 17.5 carburetor | VHSB34 LD carburetor | VHSB34 LD carburetor |
| Starting: | Kick | Kick | Kick |
| Transmission: | 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 |
| Front Suspension: | Hydraulic fork, Ø 40 mm | Marzocchi upside down fork | Marzocchi upside down fork |
| 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 |
| Front Brakes: | Single stainless steel disc, Ø 260 mm, floating caliper | Single Ø 250 mm disc | Single disc, 250 mm |
| Rear Brakes: | Single disc, Ø 180 mm, floating caliper | Single Ø 220mm disc | Single disc, 220 mm |
| Front Tyre: | 90/90-21 | 90/90-21 | 90/90-21 |
| Rear Tyre: | 110/80-18 | 120/80-19 | 120/90-18 |
| 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 |