Aprilia has always been the undisputed leader in 125 cc supersports, a market segment in which Aprilia has pioneered new concepts and advanced solutions, and developed technology that others have struggled to follow. Like all Aprilia motorcycles, the RS 125 has benefited from the sophisticated technology that has been developed over years of success in GP racing, and quickly transferred into production. Over the years, the RS 125 has forged a reputation as the standard setter for sports 125’s. Sales success has come naturally too, with the RS 125 topping the sales tables on major European markets. The RS 125 is the inevitable choice of riders entering Sport Production racing. And rightly so, because when the competition gets tough, there is simply no other bike like the Aprilia RS 125. The Aprilia RS 125 offers young riders the best in components and equipment, and a concentration of technical refinements worthy of a flagship supersport.

Engine: Liquid cooled, single cylinder two stroke. Aluminium cylinder with Gilnisil coated liner. Read valve intake and exhaust port valve. Separate lubrication. Homologated to Euro 2 standards
Bore by stroke: 54 x 54.5 mm
Displacement: 124.8 cc
Compression ratio: 12.5 ± 0.5:1
Carburettor: Dell’Orto PHBH 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: 40/17 (2.35)
Clutch: Multi-disc in oil bath
Frame: Cast aluminium, reinforced box section, sloping twin-spar frame
Front suspension: Upside down hydraulic fork, Ø 40 mm. Wheel travel 120 mm.
Rear suspension: Cast aluminium box section swingarm with asymmetric members. Hydraulic monoshock with adjustable spring preload. Wheel travel 120 mm.
Brakes:
Front: Floating Ø 320 mm disc. Radial caliper with four different 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)