APRILIA RS 125 TECHNICAL STATS RS125

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Engine	Liquid cooled, single cylinder two stroke. Aluminium cylinder with Nikasil coated liner. Read valve intake. Separate lubrication. Homologated to Euro 3 standards.
Fuel	Dell’Orto VHSB 28
Bore x Stroke	54 x 54,5 mm
Total displacement	124,8 cc
Compression ratio	12,5 ± 0,5:1
Fuel system	Dell’Orto VHST 28.
Ignition	Electronic CDI ignition.
Starting	Electric
Generator	12V - 180 W
Lubrification	Separate mixing with variable displacement, volumetric pump.
Gear box	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)
Clutch	Multi-plate in oil bath.
Primary drive	Gearbox: 63/19 (3.31).
Final drive	Chain: 17/40 (2.35).
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
Fuel tank capacity	14 litres (3.5 litre reserve).
Carburettor	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.