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TECHNICAL SPECIFICATIONS APRILIA RS 125
Engine Liquid cooled, single cylinder two stroke. Aluminium cylinder with Nikasil coated liner. Read valve intake. Separate lubrication. Homologated to Euro 3 standards.
Bore by stroke 54 x 54.5 mm.
Displacement 124.8 cc.
Compression ratio 12.5 ± 0.5:1.
Carburettor Dell’Orto VHST 28.
Ignition Electronic CDI ignition.
Starting Electric.
Alternator 12 V – 180 W
Lubrication Separate mixing with variable displacement, volumetric pump.
Gearbox 6 speed.
1st 10/30 (0.33)
2nd 14/29 (0.48)
3rd 17/27 (0.63)
4th 19/25 (0.76)
5th 21/24 (0.87)
6th 22/23 (0.67)
Primary drive Gearbox: 63/19 (3.31).
Final drive Chain: 17/40 (2.35).
Clutch Multi-plate in oil bath.
Frame Sloping twin-spar frame in thin wall box section cast aluminium, with reinforcement cross-ribbing.
Front suspension Upside down hydraulic fork, Ø 40 mm. Wheel travel 120 mm.
Rear suspension Swingarm with asymmetric members in thin wall box section cast aluminium. Hydraulic monoshock with adjustable spring preload. Wheel travel 120 mm.
Brakes
Front: Floating Ø 320 mm disc. Radial caliper with four differential diameter pistons, Ø 32 mm – Ø 27 mm.
Rear: Single Ø 220 mm disc. Caliper with two Ø 30 mm pistons.
Wheels Aluminium alloy. Front 3.00 x 17”; rear 4,00 x 17”.
Tyres Tubeless radial. Front 110/70 17”; rear 150/60 17”.
Dimensions Overall length 1955 mm
Overall width (at handlebars) 720 mm
Overall height (at windshield) 1100 mm
Seat height 805 mm
Wheelbase 1345 mm
Tank 14 litres (3.5 litre reserve).
Colours Aprilia GP Black, Aprilia GP White, Spanish GP Replica.
The 21 kW RS 125 (sold on the German market) is still equipped with a Dell’Orto PHBH 28 carburettor and is homologated to Euro 2 standard.