1997 Aprilia RS 125R

Make Model	Aprilia RS 125 R
Year	1997 - 98
Engine	Single cylinder, two stroke, reed valves induction
Capacity	125 cc / 7.6 cu in
Bore x Stroke	54 x 54.5mm
Compression Ratio	14.5:1
Cooling System	Liquid cooled
Induction	Dell'Orto VHSB 34LD
Ignition	Electronic
Starting	Electric
Max Power	24.8 kW / 34 hp @ 11000 rpm
Max Torque	25 Nm / 2.5 kgf-m / 18.4 lb-ft @ 9000 rpm
Transmission	6 Speed
Final Drive	Chain
Front Suspension	Upside-down forks, Ø 40mm
Front Wheel Travel	120 mm / 4.7 in
Rear Suspension	Monoshock
Rear Wheel Travel	120 mm / 4.7 in
Front Brakes	Single 320 mm discs, 4 piston caliper
Rear Brakes	Single 240 mm disc, 2 piston caliper
Front Tyre	110/70-17
Rear Tyre	150/60-17
Dry Weight	115 kg / 254 lbs
Wet Weight	142 kg / 313 lbs
Fuel Capacity	11.5 L / 3.0 US gal
Consumption Average	5.1 L/100 km / 19.5 km/l / 45.9 US mpg
Braking 60 km/h / 37 mph - 0	13.2 / 43.3 ft
Braking 100 km/h / 62 mph - 0	37.9 m / 124.3 ft
Standing ¼ Mile	14.3 sec / 148.0 km/h / 92 mph
Top Speed	171.3 km/h / 106 mph

Like the firm's RS50, the RS125 has a very high level of equipment, performance and styling for its class. An aluminium alloy perimeter beam frame holds an advanced liquid-cooled two-stroke engine. The 125cc single-cylinder motor uses a ceramic-type coating on the cylinder to cut friction and wear, while modern intake and exhaust designs boost power to over 194kW (260bhp)/litre.

The aerodynamic fairing echoes the designs of Apt-ilia's GP machinery, and there have been various race-replica paint schemes. The RS125 has a high-specification chassis design, with wide, sporty tyres, 40mm (0.8in) upside-down front forks and an aluminium swingarm with adjustable monoshock rear suspension, giving fine handling especially on the track.