- single cylinder two stroke
- Dell’Orto VHST 28
- 124 cc
The 2012 version of the Aprilia RS 125 is powered by a single cylinder, two stroke, Rotax-Aprilia engine. Needless to say that the engine is fitted with all the modern technologies expected from a top manufacturer and is reliable to the core.
Among the technical features offered by the 124,8 cc unit, you’ll find a crankcase reed valve intake, liquid cooling, an anti-vibration balancer shaft and an automatic mixing system. The unit is also fitted with a catalytic converter and precision carburation which helps it meet the Euro 3 emission regulations.
The Aprilia’s RS 125 frame is made from cast aluminum alloy with cross ribbing reinforcement. Aprilia developed the RS 125’s frame using its experience in the GP 125 racing so you can expect to first class build quality. Despite its extremely light weight, this advanced structure achieves amazing tensional rigidity.
Hit the jump for more information on the 2012 Aprilia RS 125.
The powerful but reliable, single cylinder, two stroke, Rotax-Aprilia engine needs no introduction. Over the years it has won a reputation for being unbeatable on the track and dependable on the road.
Still today, this engine boasts technical solutions that are state-of-the-art for two strokes, including a crankcase reed valve intake, liquid cooling, an anti-vibration balancer shaft, and an automatic mixing system. The RS 125’s engine has been constantly updated over the years to keep in line with the latest emission control legislation without penalising performance. A catalytic converter and precision carburation has won Aprilia’s single cylinder two stroke homologation to Euro 3 standards. And the amazing thing is that this has been achieved without losing out on performance: the Aprilia RS 125 engine remains the reference point for all 125 cc powerplants.
Without a doubt, the most advanced single component on the RS 125 is its frame. Developed from Aprilia’s vast experience in GP 125 racing, the RS 125 frame is made from cast aluminium alloy with cross-ribbing reinforcement. Despite its extremely light weight, this advanced structure achieves amazing torsional rigidity, setting the standards for Aprilia’s competitors.
The box section, aluminium alloy swingarm has the highest torsional rigidity of all production 125 cc swingarms. Differential side members enable the exhaust to follow a path that maximises engine performance and enables more acute angles of lean to be achieved on bends without risking dangerous contact with the asphalt.
The suspension too plays a fundamental role in ensuring not only the RS 125’s performance, but its safety and comfort too. The RS 125 can rely on an upside-down fork that has been optimised for maximum performance on the racetrack while also delivering a more satisfying ride on public roads.
The rear suspension features rising rate linkages based on Aprilia’s 125 GP racing technology, for excellent traction and superb comfort even over uneven road surfaces. The hydraulic monoshock that provides the damping for the swingarm is also adjustable in spring preload.
Like any self-respecting supersport motorcycle, the RS 125 has to have the best when it comes to components. The braking system is the best available, and designed for maximum efficiency under competitive riding conditions. The front brake is a genuine state-of-the-art, high performance system with a radial caliper and four opposed pistons. In addition to the 320 mm front disc, the system also incorporates a radial master cylinder and aeronautical hoses for maximum precision and unrivalled braking power. The rear disc is 220 mm in diameter and is also equipped with metal braided hoses for perfectly balanced, high performance braking.
The mean, cutting edge look of the new RS 125 tells you that this is a professional racing machine. The styling of the RS, like that of all Aprilia sports bikes, is the result of painstaking aerodynamic research.
The fairing, for example, was perfected by extensive wind tunnel testing, to guarantee great wind protection and minimum drag for maximum racetrack efficiency. The fairing, windshield and tail not only look mean and aggressive, but allow the RS 125 to reach a blistering top speed, eliminating all turbulence around the rider and allowing man and machine to become one.
The latest generation twin halogen headlight also adds to the mean look of the new RS 125, and delivers a high power light beam for enhanced visibility and safety at night. The sleek tail looks exactly like the tail of a GP racer. Thanks to the effort put into the design of the RS 125’s tail, not even the passenger seat disturbs the bike’s impeccable lines.
The crossed spoke wheels are not only lighter and more stylish, but safer and more reliable too.
The Aprilia RS 125 is packed with prestige components. Compact and impressively light in weight, the instruments include an analog rev counter and a multifunctional digital display with an on-board computer that can be operated from the handlebars. The speedometer, rev counter, coolant temperature gauge and exclusive racing chronometer put you in total control. The on-board computer even has provision for interfacing with the optical finishing systems used on racetracks.
|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 VHST 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.|
|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.|