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| | | 2007 APRILIA RS 125, The champion maker |  Written: 30/03/2007 : 14:14. Read 63222 times (36/day). | The RS 125 is the undisputed leader among 125 cc supersports. Aprilia has always led the field in lightweight sports bikes, pioneering new concepts and advanced solutions, and developing technology.
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The 2007 Aprilia RS 125 is designed and built for technical supremacy and has the looks to match. Its graphics are totally new and based entirely on those of the bike that dominated the 2006 250 GP world championship.
The Aprilia RS 125 gives young riders the best the market has to offer in terms of components and equipment, with a concentration of technical refinements that are not found on many superbikes.
The following are just some of the main features of the MY 2007 Aprilia RS 125.
-Tried and tested yet extremely sophisticated Rotax two stroke engine.
-Super-rigid aluminium frame and swingarm derived from Aprilia’s vast GP experience.
-Upside down fork.
-Front brake with radial caliper and four opposed pistons.
-RSV 1000 R style fairing, windshield and tail.
-RSV Factory style, crossed spoke wheels.
-Analog/digital instrument panel with multi-functional computer.
-RSV Factory style, forged steering yoke.
-Oval section racing silencer with riveted end plates.
ENGINE
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.
CHASSIS
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. 
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 2007 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.
EQUIPMENT
The world’s top racing 125 obviously deserves top quality equipment.
The Aprilia RS 125 benefits from the compact and lightweight, latest generation instruments that are derived from those of the RSV 1000 R and include an analog rev counter and a multifunctional digital display incorporating an on-board computer that can be operated directly from the handlebars. 
POWER KIT
A power kit, designed exclusively for racetrack use, is also available as an optional accessory to achieve the full potential of this amazing two-stroke engine.
The kit includes:
-racing expansion chamber exhaust
-complete racing exhaust valve
-control unit and solenoid for racing exhaust valve
-needle, main jet and atomiser for full power carburation
-racing spark plug
It is a real small Bomb on road, the little mosquito ready to beat any over-confident Hornets...
But performance has a price... 5 490,00 € (7.307$)
APRILIA RS 125 TECHNICAL SPECIFICATIONS
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.
Displacement1 : 24.8 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 Black, Aprilia White, Spain’s N. 1
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