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Make Model	Aprilia RS4 125
Year	2011
Engine	Liquid cooled, four stroke single cylinder DOHC 4 valves. Euro 3 homologated
Capacity	124.8
Bore x Stroke	58 X 47 mm
Compression Ratio	12.5 ± 0.5:1
Induction	Electronic injection
ECU	Magneti Marelli MIU G3 32 MM DIAM.
Ignition / Starting	Electronic with CDI capacity discharge / electdric
Clutch	Multiple discs, in oil bath
Max Power	16 hp 11.7 kW) @
Max Torque
Transmission / Drive	6 Speed / chain
Gear Ratio	1st 11/33 (0.33) 2nd 15/30 (0.50) 3rd 18/27 (0.67) 4th 20/24 (0.83) 5th 25/27 (0.92) 6th 23/22 (1.05)
Frame	Aluminum perimeter frame
Front Suspension	41 mm upside down fork, 110mm wheel travel.
Rear Suspension	Asymmetric swingarm with monoshock, 130mm wheel travel.
Front Brakes	Single 300mm discs 4 piston caliper
Rear Brakes	Single 218mm disc 1 piston caliper
Front Tyre	110/80 –17
Rear Tyre	130/70 –17
Seat Height	820 mm / 32.3 in
Wet-Weight	120 kg / 264.6 lb
Fuel Capacity	14.5 Litres / 3.8 gal

Aprilias small supersports bikes have been completely revised. Two models dedicated for young enthusiasts who want their first experience in the motorcycling world to be with a proper bike.

* Aprilia RS4 marked a milestone in the evolution of the 125 cc motorcycle.
* For the first time ever, the sportiest bike available for 16 year olds was a 4-stroke.
* For the youngest riders of all, the Aprilia RS 50 embodies all of Aprilias technology in a genuine racing replica in just 50 cc.

Aprilia has always been the undisputed leader in the 50 and 125 cc supersports segment, pioneering innovative concepts and solutions and setting trends for its rivals to follow.

The Aprilia RS4 125 is the natural successor and most advanced evolution to date of the Aprilia RS 125, the bike that has dominated the 125 cc sports class for years, which set the benchmark for the one-eighth litre sports segment and which is still today the most highly sought after machine among riders competing in the Sport Production category.

Aprilia RS4 125 introduces the highly advanced, all-new 4 stroke powerplant to the sports segment, while adopting styling and technical solutions inherited from the RSV4, the superbike that led Aprilia to victory in the WSBK 2010 championship.

The most significant characteristics of the Aprilia RS 50 and Aprilia RS4 are:

* RS4 125 - single cylinder liquid cooled 125 cc 4-stroke with electronic injection, 4 valves and double overhead camshafts (DOHC)

characteristics in common:

* extremely stiff aluminium perimeter frame derived from racing experience
* 41 mm upside down fork
* front brake with 300 mm disc and radial four piston calliper
* Superbike inspired analogue/digital instrument panel
* fairings derived directly from RSV4 project for total aesthetic coherence with the SBK world champion

DESIGN

The livery and eye-catching forms of the Aprilia RS 50 and RS4 125 echo the looks of the Factory version of the Aprilia RSV4 supersports bike. And the RS 50 and RS4 125 share more than just a family resemblance with the most hardcore street version the bike dominating the world SBK championship.

The design of the fairings and tank, the unique looks of the front end, with the headlights suspended over the gaping air intakes, and the spectacular tapered tail fairing are identical to their counterparts on 1000 cc supersports model that set new standards in terms of style and technical content for the superbike segment.

Extensive aerodynamic studies have minimised surface areas without compromising wind protection, and the fairings showcase the superlative mechanicals of the Aprilia RS 50 and Aprilia RS4 125 rather than conceal them. As a result, the frame and engine are not hidden away but proudly flaunted as fundamental elements of the design of Aprilias new small supersports models. With the triple headlight, the Aprilia RS 50 and RS4 have a decidedly aggressive look that lends a unique character to the entire front end. The LED taillight merges stunningly into the ultra-compact tail fairing and offers excellent luminosity. Even from behind, the Aprilia RS4 125 is absolutely unmistakable.

The product of extensive wind tunnel testing and race experience, the fairing offers excellent wind protection together with superb aerodynamic efficiency. And as well as contributing to the extremely aggressive looks of the bike, the top fairing and tail fairing also maximise performance in terms of speed.

ENGINES

With the new RS 50 and RS4 125, Aprilia confirms its global leadership in the small capacity sports bike segment, creating models that exceed the expectations of even the most discerning rider.

The sophisticated chassis architecture of the Aprilia RS 50 and RS4 125 is complemented by state of the art engines.
The single cylinder 50 cc unit developed by Aprilia for the RS 50 is a water cooled two-stroke with reed valve induction. The lubrication uses a separate mixing system with a variable capacity volumetric pump. The six speed gearbox lets the rider make full use of the performance of this class beating engine.

The Aprilia RS4 is powered by an all new 125 cc water cooled 4 stroke single cylinder engine with four valves and electronic engine boasting a sophisticated double overhead camshaft (DOHC) valve timing system. This state of the art engine produces the maximum power output permitted for the class with a smooth, linear delivery and ecologically - as it meets even the strictest emissions regulations in effect.

With a six speed gearbox allowing the rider to make full use of the power available in all conditions, the Aprilia RS4 offers unbeatable performance in its class not just in terms of absolute power at high engine speeds, but also in terms of usable power band, minimised vibration and outstanding mechanical reliability.

The product of a cutting edge design, the new single cylinder 125 cc unit features dry sump lubrication making it extremely light and compact, allowing Aprilias engineers to develop a class beating chassis layout.

CHASSIS

The RS 50 and RS4 125 stand head and shoulders above the competition for their superlative chassis layout: developed on the basis of Aprilias outstanding successes in WSBK and GP 125, the frame consists of die cast aluminium spars with crossed reinforcement ribs. With its state of the art design, this extremely lightweight structure offers exceptional torsional stiffness.
The front suspension also boasts a class beating layout, with a sturdy 41 mm upside fork, red anodised stanchion clamps and a wheel travel of 110 mm, while at the rear is a monoshock linked directly to the asymmetric swingarm.

Both the Aprilia RS 50 and RS4 125 boast class beating brake systems: each bike uses a 300 mm steel disc at the front, gripped by a four piston radial calliper, and a 220 mm disc at the rear with a single piston calliper.
The 17” wheels are shod with 100/80 rubber up front and a 130/70 tyre at the rear.


STANDARD EQUIPMENT AND FEATURES

The multifunctional analogue/digital instrument panel with LCD display draws directly from Aprilias experience in the Superbike class. The split 6-spoke design of the wheels further emphasises the purposeful character of Aprilias latest small capacity sports bikes.

On Aprilia RS4, one additional detail underscores the level of sophistication of the bike: the exhaust, which is unmistakably inspired by competition machines, is completely integrated within the lower part of the fairing. A solution that is not just visually effective, but which also contributes significantly to the dynamics of the bike by helping to centralise masses.

The passenger saddle is yet another example of the extreme level of sophistication of these new bikes from Aprilia. Instead of fiddly screws, a practical quick release button allows the passenger seat to be exchanged with the tail fairing cover in an instant to transform the bike from two seat to single seat configuration

The livery and crowd pleasing varieties of the Aprilia RS fifty and RS4 a hundred twenty five echo the appearance of the Factory version of the Aprilia RSV4 supersports bike. and also the RS fifty and RS4 a hundred twenty five share quite simply a family resemblance with the foremost hardcore street version the bike dominating the globe SBK championship.

The design of the fairings and tank, the distinctive appearance of the front finish, with the headlights suspended over the gaping air intakes, and also the spectacular tapered tail fairing are a twin of their counterparts on one thousand cc supersports model that set new standards in terms of fashion and technical content for the superbike section.

Extensive aerodynamic studies have minimised surface areas while not compromising wind protection, and also the fairings showcase the superlative mechanicals of the Aprilia RS fifty and Aprilia RS4 a hundred twenty five instead of conceal them. As a result, the frame and engine arent hidden away however proudly flaunted as elementary parts of the planning of Aprilias new little supersports models. With the triple headlight, the Aprilia RS fifty and RS4 have a decidedly aggressive look that lends a singular character to the complete front finish. The LED taillight merges stunningly into the ultra-compact tail fairing and offers wonderful luminosity. Even from behind, the Aprilia RS4 a hundred twenty five is totally unmistakable.

The product of intensive wind tunnel testing and race expertise, the fairing offers wonderful wind protection beside very good aerodynamic potency. And also as contributing to the extraordinarily aggressive appearance of the bike, the highest fairing and tail fairing conjointly maximise performance in terms of speed.

Aprilia RS4 125 undergoing testing at the circuit prime Vairano, Italy. As a result, riding RS4 125, such as motor gush Superbike.

From a distance, the RS4 looks almost exactly like the RSV4 Superbike, where the style is exactly the motor. But if you look closely, and noticed all the space under the fairing, you will realize this bike is a 125cc four-stroke and single cylinder.

Only, the focus of talks about the Aprilia RS4 125 is about four-stroke engine. This motor is strong enough and the same two-stroke engine ever. But once above 9000 rpm the motor is turned out pretty good.

Circuits can dilibas well and good bike handling. Wrapped with Pirelli Super Corsa SC1s, take turns to be very fun either sharp bend or curve flat.

The 2011 KTM 125 EXC Sixday Offroad-Competition starts the new season with even more optimisations. With its well-known powerful engine, new frame design and improved chassis, it faces down the competition in the E1 class. A great example of simple two-stroke technology with superior power and minimal weight. Its never been so easy to be ready to race!

2011 KTM 125 EXC Sixday Offroad-Competition

Engine
The 2011 KTM 125 EXC Sixday models draw their power from two-stroke and four-stroke racing engines which have been optimised down to the finest detail for Enduro racing. Powerful, with perfect power delivery and excellent durability. Pure energy!

Tank
Ergonomic tank for ideal contact with the bike.Special KTM airflow system with ducts beneath the spoilers for anoptimum fresh air supply to the airbox. Another advantage for racing: transparent polyethylene lets you see the fuel level from the outside.

Seat
The seat of the Six-Days bike is supplied with additional pockets and logos. It also has a reduced-weight, optimised foam core for improved comfort and longer service life.



2011 KTM 125 EXC Sixday Offroad-Competition International Specifications
MSRP: See KTM Dealer for prices

Engine type Single cylinder, 2-stroke
Displacement 124.8 cc
Bore x stroke 54 x 54.5 mm (2.13/2.15")
Starter Kickstarter
Transmission 6 gears
Carburetor Keihin PWK 36 S AG
Control Exhaust control
Lubrication Mixture oil lubrication 1:60
Transmission oil Motorex, SAE 15W-50
Primary drive 23:73
Final drive 14:42 (13:50)
Cooling Liquid cooled
Clutch Wet multi-disc clutch, operated hydraulically
Ignition Kokusan


Frame Central double-cradle-type 25CrMo4 steel
Subframe Aluminium
Handlebar Neken, Aluminium Ø 28/22 mm (1.10/0.87")
Front suspension WP USD Ø 48 mm (1.89")
Rear suspension WP PDS shock absorber
Suspension travel front/rear 300/335 mm (11.81/13.19")
Brakes, front/rear Disc brakes Ø 260/220 mm (10.24/8.66")
Rims, front/rear 1.60 x 21"; 2.15 x 18" Excel
Tires, front/rear 90/90-21"; 120/90-18"
Chain X-ring chain 5/8 x 1/4"
Main silencer Aluminium
Steering head angle 63.5°
Wheel base 1471 ± 10 mm (57.91 ± 0.39")
Ground clearance (unloaded) 390 mm (15.35")
Seat height 985 mm (38.78")
Tank capacity approx. 9.5 liters (2.51 gal)
Weight (no fuel) approx. 97 kg (213.8 lbs)


KTM PRESS RELEASE

PERFECTLY POSITIONED: THE KTM OFFROAD MODEL YEAR 2011


KTM’s Mattighofen factory in Austria has invested a huge amount of effort in developing the latest Offroad motorcycles for the 2010 season with the clear aim of improving the advantage on loose ground even more. Star of the KTM model range is the revolutionary MX1 innovation, the 350 SX-F.

The current motorsport season is well underway and the KTM factory riders have already claimed a slew of podiums on the latest “Made in Austria“ Offroaders. Now the sports brand from Austria presents the line-up of brand new motorcycles for the Model Year 2011.

With three high quality and competitive Minicycle variants for the youngest offroad enthusiasts, a total of six uncompromising Motocross motorcycles especially designed for winning races as well as eight versions of Sport Enduros, the Austrian manufacturer presents the perfect line-up for the coming season. In doing so, KTM once again underlines its leading role in the world of Offroad sports activity.

The huge amount of depth of development in the new Offroad model range extends all the way from the 50 cc two-stroke (50 SX) right up to the powerful displacement of the Enduro 530 EXC-R. In between there is a whole range of tailor-made sports machines for every type of offroad riding and for every rider profile, all absolutely true to the KTM “Ready to Race” philosophy. KTM has just the right machine, regardless of whether it’s for the ambitious hobby rider or the ruling world champion.

As well as the huge development effort that the KTM technicians have applied to the entire model range, these new motorcycles still include some very special innovations. This especially applies to the 350 SX-F, which was first exhibited last autumn. This, the first ever 350 cc bike deployed in the MX1 World Championship, has already been mastered by factory riders Antonio “Tony” Cairoli and his Red Bull KTM teammate Rui Goncalves. Cairoli not only won the premiere race for the 350 machine; after his GP victories, he is also leading the championship standings.

In addition to the unique engine concept, the MX lineup for the 2011 also includes a newly developed frame and chassis components.

The Enduro models, which have been similarly decorated with world championship titles all also profit from the massive amount of experience gathered by not less than 176 World Championship titles. This can be seen both in the feather light two-stroke versions as well as the highly modern and performance powerful four-stroke models. With significant improvements in a while range of areas as well as the extensive series equipment, these machines are prepared in the best possible way for the new racing season.

The new Motocross, Enduro and Minicycle models will be delivered to KTM dealers from June of this year.