The Aprilia RX 125 Six Days ModelM was a motorcycle produced from 1991-1992. It had a single cylinder, two-stroke Rotax 123 engine with a Gilardoni 2 cylinder/head and a capacity of 124.8 cc. The compression ratio was 11.5:1 and it was cooled by liquid. The six-speed transmission drove a #520 chain with 12-17T pinion and 49T spur gears. It had a Marzocchi upside down fork and a swingarm with single shock absorber in the rear that was fully adjustable with an Aprilia Progressive System Boge Sachs shock absorber. The front and rear brakes were single discs. The front tyre measured in at 90/90-21 and the rear at 120/90-18. The wet weight of the motorcycle was 110 kg with a fuel capacity of 9 L. The fuel consumption rate averaged at 5.5 L/100 km. In terms of braking, the 60 km/h-0 stopping distance was 14.8 meters and the 100 km/h-0 stopping distance was 43.1 meters. The standing quarter-mile time was 15.2 seconds with a top speed of 132.2 km/h. Motosprint 1990 Group Test conducted a road test on the motorcycle.
Make Model: Aprilia RX 125 Six Days ModelM
Year: 1991 – 92
Engine: Single cylinder, two stroke, Rotax 123 with Gilardoni 2 cylinder/head
Capacity: 124.8 cc / 7.6 cu in
Bore x Stroke: 54 x 54.5 mm
Compression Ratio: 11.5:1
Cooling System: Liquid cooled
Induction: VHSB34 LD carburetor
Starting: Kick
Max Power: 25.7 kW / 34.5 hp @ 10800 rpm
Max Torque: 20.6 Nm / 2.1 kgf-m / 15.2 lb-ft @ 10500 rpm
Transmission: 6 Speed
Final Drive: #520 Chain, 12T to 17T pinion gear, 49T spur gear
Front Suspension: Marzocchi upside down fork
Rear Suspension: Swingarm with single shock absorber, Aprilia Progressive System with fully adjustable Boge Sachs shock absorber
Front Brakes: Single disc, 250 mm
Rear Brakes: Single disc, 220 mm
Front Tyre: 90/90-21
Rear Tyre: 120/90-18
Wet Weight: 110 kg / 243 lbs
Fuel Capacity: 9 L / 2.4 US gal / 2.0 Imp gal
Consumption Average: 5.5 L/100 km / 18.2 km/l / 42.8 US mpg / 51.4 Imp mpg
Braking 60 km/h / 32 mph – 0: 14.8 m / 48.6 ft
Braking 100 km/h / 67 mph – 0: 43.1 m / 141.4 ft
Standing 1/4 Mile: 15.2 sec / 131.4 km/h / 81.6 mph
Top Speed: 132.2 km/h / 82.1 mph
Road Test: Motosprint 1990 Group Test
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