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| | | APRILIA SL 750 SHIVER |  Written: 14/11/2006 : 18:42. Read 39538 times (21/day). | THE MEDIUM POWERED NAKED CLASS DISCOVERS THE APRILIA SL 750 SHIVER.
INTUITIVE, POWERFUL, MANOEUVRABLE AND HIGH TECHNOLOGY.
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The brand new 90° V2 produced entirely in-house by Aprilia is extremely compact. Above all, thanks to the advanced electronic management, it can deliver power comparable to four cylinder engines in the same class, but with much more favourable torque at low revs. The innovative mixed trellis/aluminium frame provides standard setting rigidity. All this makes the bike extremely compact, with a dry weight of just 189 kg.
The main characteristics of the Aprilia 750 are:
- 90° V2 engine with four valve cylinder head, double overhead camshaft and liquid cooling.
- Ride by Wire technology for electronic control of the throttle bodies;
- Electronic fuel injection with latest generation injectors;
- Mixed gear and chain valve timing;
- Three way catalytic converter on the exhaust, Euro 3 compliant
- Dismountable trellis/aluminium frame for high torsional rigidity;
- Aluminium swingarm with reinforcement truss and lateral shock absorber;
- 43 mm upside down fork;
- Racing brakes with radial caliper at front;
THE DESIGN
The frame and engine are the foundations of the design and are also, rightly, the main elements characterising the look of the SL 750 Shiver. Each element has been designed to be not just beautiful but also functional. The Aprilia SL 750 Shiver exhaust is also a very distinctive design element.
The tank-seat-tail assembly further emphasises the compactness of the bike. The strongly tapering tail also incorporates the twin exhaust with triangular silencers, a feature which keeps weight distribution highly symmetrical.
The adoption of a side shock absorber not just adds a further distinctive feature to the look of the bike, but also enables the length of the bike.
THE V90 ENGINE
The engine has been designed by the Aprilia Research and Development department. In summary:
- 90° V structure;
- Ride by Wire technology;
- Bore and stroke ratio markedly supersquare;
- Four valves per cylinder;
- Ignition with two plugs per cylinder;
- Double overhead camshaft, controlled by a mixed chain and gear system;
- Electronic fuel injection with two throttle bodies;
- Three way catalytic converter and lambda probe oxygen sensor (Euro 3 compliant).
The timing deserves special mention. Motion is transmitted to the four valves per cylinder and double camshaft by a mixed gear/chain system. This technical application, already adopted by Aprilia in the V60 mounted on the RSV 1000 R, enables the size of the engine to be kept down, while guaranteeing more precise and reliable timing. The chain is shorter, for less overall stress and a longer working life; this makes the engine shorter.
The latest generation injection system uses fine atomising injectors. This, together with the ignition with two spark plugs per cylinder, ensures optimum combustion for an engine which is not just more powerful, but also cleaner.
In the Aprilia SL 750 Shiver, Ride by Wire technology becomes part of the standard equipment of a naked bike for the first time in the history of motorcycling. The electronic accelerator management optimises opening of the throttle bodies according to numerous parameters, including engine speed, gear selected and position of the throttle. The engine is therefore always able to offer optimum performance in acceleration and the lowest possible consumption for a still more fluid and profitable ride.
Thanks to the technology used, the Aprilia V90 manages to deliver exceptionally high power for the engine configuration. 95 HP at 9000 revs and maximum torque of 81 Nm at 7000 revs are excellent for a twin of this capacity.
A latest generation engine management unit controls all engine parameters. All data passes through a CAN (Controlled Area Network) line to the instrument panel, which also acts as a diagnostic terminal. The CAN line uses just two wires to transmit all data. This simplifies the electrical system enormously as well as reducing the total weight of the bike.
The exhaust is made entirely from stainless steel. The manifolds come together under the seat in a single silencer with twin tail pipes. The large volume (10 litres) contributes to perfect engine breathing for excellent efficiency.
THE FRAME
The frame exploits all the knowledge Aprilia has gained in racing and also draws on new studies on mixed structures with the futuristic RXV and SXV, already winners of a number of titles during their debut on the racetrack. The top part of the tubular steel trellis is connected to large side plates by means of special high strength bolts. This creates an extremely rigid lightweight frame.
The reduced longitudinal dimensions of the engine made it possible to design a short, agile bike, helped by the particular side positioning of the shock absorber, not a simple cosmetic mannerism, but a precise technical decision which created valuable space for the exhaust manifolds whose shape and size have been calibrated perfectly to ensure maximum engine efficiency. This enabled the optimum exhaust manifold configuration to be obtained, without too heavily affecting the length of the bike and without exposing the shock absorber, a fundamental element for the ride, to heat stress.
The aluminium swingarm with reinforcement truss has been sized specifically to support the asymmetrical stresses caused by lateral positioning of the shock absorber.
SUSPENSION
The 43 mm upside down fork with forged feet to support the radial calipers provides benchmark smoothness. Whell traveil is 120 mm.
The side shock absorber rests directly on the swingarm, according to the cantilever principle, and provides adjustments for spring preload and hydraulic rebound. Rear wheel travel is 130 mm.
THE BRAKES
The Aprilia SL 750 Shiver is the first medium powered naked with a radial caliper system, a feature emphasising even further (as if it were needed) the sporty personality of the design. The 320 mm front disks are the same as used in the racing flagships, the RSV 1000 and Tuono 1000 R.
At the back, a 245 mm disk with twin piston caliper provides adequate backup for the front circuit.
The front and rear braking circuits both use aeronautical metal braid hoses to eliminate the pressure variations associated with conventional rubber brake lines, guaranteeing maximum braking precision for a top level system.
The Matrix instrument panel
The combined digital and analog instrument panel receives all the data over a CAN line and acts as an integral part of the self-diagnostics system as it also has a memory.
All functions can be switched by means of the handlebar control. The LED backlighting can be adjusted to three levels: white in the analogue zone and red in the digital zone.
The biconical aluminium handlebars are a direct reference to the handlebars of the Tuono: maximum lightness and maximum control.
APRILIA SL 750 Shiver - Technical Specifications
Engine
Aprilia V90 Four stroke longitudinal 90° V twin. Liquid cooling. Double overhead camshaft with mixed gear/chain drive; four valves per cylinder.
Fuel: Unleaded petrol.
Bore x stroke: 92 x 56.4 mm
Total displacement: 749.9 cc
Compression ratio: 11 : 1
Maximum power at the crank: 95 HP at 9000 rpm.
Maximum torque at the crank: 8.25 kgm at 7000 rpm.
Fuel system: Integrated engine management system. Injection with Ride by Wire technology control of the throttle bodies
Ignition: Digital electronic, integrated with the injection, two spark plugs per cylinder
Starting: Electric
Exhaust: Two in one system in 100% stainless steel with three-way catalytic converter and Lambda probe
Generator: 450 W at 6000 rpm.
Lubrication: Wet sump
Gearbox: six speed, transmission ratio:
1° 36/14 (2.57)
2° 32/17 (1.88)
3° 30/20 (1.5)
4° 28/22 (1.27)
5° 23/26 (0.88)
6° 24/25 (0.96)
Clutch: Multi-plate in oil bath, cable operated.
Primary drive: Spur gears, transmission ratio: 60/31 (1.75)
Final drive: Chain
Transmission ratio: 16/44
Frame
Dismountable steel trellis connected with high strength bolts to aluminium side plates. Dismountable rear frame.
Front suspension: 43 mm upside-down fork. 120 mm wheel travel.
Rear suspension: Aluminium alloy swingarm with reinforcement truss. Hydraulic shock absorber adjustable in spring preload and rebound damping. Wheel travel: 130 mm.
Brakes
Front: Double stainless steel floating disc (Ø 320 mm ). Four piston radial calipers. Metal braided brake line.
Rear: Steel disk ( 245 mm) with twin piston caliper. Metal braided brake line.
Wheels
In aluminium alloy, Front: 3.50 X 17" Rear: 6.00 X 17"
Tyres
Radial tubeless;
front: 120/70 ZR 17
rear: 180/55 ZR 17
Dimensions
Overall length: 2066 mm
Overall width: 815 mm (at handlebars)
Overall height: 1132 mm
Seat height: 810 mm
Wheelbase: 1449 mm
Trail: 109 mm
Rake angle: 25.7°
Dry weight
189 kg
Tank capacity
15 lt
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| Comments | |
 bikenut (17-11-2006): i've waited 15 years for a v twin 750 like this to be made by the japs . aprilia comes out of left field and makes 2 750 v twin models !! can't wait to read tests on them ! 2 months ago , and after a 15 year absence from riding i bought a used 2001 speed triple 2 months ago ,it is without a doubt the most fun bike i have ever owned !
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