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FIRST LOOK: APRILIA MXV450 |
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Wednesday, 22 November 2006 |
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Page 2 of 2
The salient specifications of the 45.2 engine
on the new MXV:
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Electronic fuel injection.
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Dry sump lubrication with the oil tank
integrated inside the crankcase. Separate lubrication for gearbox and engine
ensures that the engine oil is not contaminated by clutch plate particles, and
remains fully efficient for far longer.
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Single overhead cam, titanium valves.
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Single-piece crankshaft.
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Cylinders integrated in crankcase, wet liners.
- Single radiator.
CHASSIS: LIGHTER THAN EVER
With the MXV’s engine setting new standards
for motocross powerplant, the chassis has had to keep pace. Not only have the
dimensions of the perimeter frame have been optimised for motocross use, but the
entire frame has been developed to complement the engine. Its design is unique
among motocross frames. A tubular steel trellis is interference fitted to pressed
aluminium side plates to form an extremely rigid structure. The engine also forms
an integral part of the chassis, acting as a load-bearing element and
contributing to exceptional overall rigidity.
The variable section aluminium swingarm is
another example of brilliant industrial design. Far more than just an element
of style, this is the most rigid swingarm on any motorcycle of this type.
Rising rate linkages operate a racing monoshock calibrated specifically for
motocross.
The Marzocchi upside down fork has 50 mm
stanchions and is also calibrated for motocross. The fork is fully adjustable,
so that you can set up your own suspension action exactly as you want it.
BRAKES
The unrivalled technology and performance of
the chassis are supported by a fantastic braking system. The MXV is equipped
with Magura calipers and super-lightweight wavy discs (270 mm at the front),
for unrivalled braking control in even the most challenging conditions.
A 240 mm rear disc and single piston Magura
caliper provide the perfect balance between stopping power and ease of control.
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Aprilia MXV – Technical specifications
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Engine
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77° V twin four stroke. Liquid
cooled. Single overhead cam with rocker operated exhaust valves, chain timing
drive, 4 valve heads, titanium valves.
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Fuel
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Lead-free petrol.
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Bore x stroke
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76 x 49.5 mm.
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Total displacement
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449 cc.
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Compression ratio
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12.5:1.
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Fuel system
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Integrated engine management
system controlling ignition and fuel injection.
Throttle body: 38 mm.
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Ignition
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Electronic.
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Starting
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Kick-start.
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Alternator
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220 W.
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Lubrication
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Dry sump with oil tank integrated
inside engine. Separate gearbox lubrication.
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Gearbox
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5 speed. Motocross gear ratios:
1st 14/29
2nd 14/25
3rd 15/23
4th 18/24
5th 21/25
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Clutch
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Multi-plate in oil bath, cable
operated.
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Primary drive
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Spur gears. Transmission ratio:
23/65.
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Final drive
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Chain. Transmission ratio: 14/49.
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Frame
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Steel perimeter frame with alloy
members.
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Front suspension
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Ø 50 mm upside down hydraulic
fork, double adjustment.
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Rear suspension
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Box section aluminium swingarm
with cast body.
Hydraulic monoshock with
compression and rebound adjustment.
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Brakes
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Front: Ø 270 mm stainless steel
disc with floating caliper.
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Rear: Æ 240 mm stainless
steel disc with floating caliper.
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Wheels
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Light alloy.
Front: 1.60 x 21”
Rear: 2.15 x 19”
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Tyres
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Front: 80/100 x 21”
Rear: 110/90 x 19”
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Dimensions
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Overall length: 2,232 mm
Overall width: 800 mm
Ground clearance: 396 mm
Seat height: 996 mm
Wheelbase: 1,505 mm
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Fuel tank
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Capacity 7.8 litres
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