TECHNICAL SPECIFICATIONS (550 cc engine specifications in brackets)

Engine
77° V twin four stroke. Liquid cooled. Single overhead cam with rocker operated exhaust valves, chain timing drive, 4 valve heads, titanium valves.

Fuel
Lead-free petrol.

Bore x stroke
76 x 49.5 mm (80 x 55 mm)

Total displacement
449 cc (549 cc).

Compression ratio
12.5:1 (12:1).

Fuel system
Integrated engine management system controlling ignition and fuel injection.
Throttle body: 38 mm. (40 mm)

Ignition
Electronic.

Starting
Electric starting.

Alternator
340 W.

Lubrication
Dry sump with external oil tank. Separate gearbox lubrication.

Gearbox
5 speed. Enduro gear ratios:
1st 12/31
2nd 13/25
3rd 15/23
4th 19/24
5th 21/22

Clutch
Multiple discs in oil bath, cable operated.

Primary drive
Spur gears. Transmission ratio: 22/56.

Final drive
Chain. Transmission ratio: 15/48.

Frame
Steel perimeter frame with alloy vertical members.

Front suspension
Ø 45 mm upside down fork, double adjustment.

Rear suspension
Box section aluminium swingarm with cast body.
Hydraulic monoshock with compression and rebound adjustment.

Brakes
Front: Ø 270 mm stainless steel disc with floating caliper.
Rear: Æ 240 mm stainless steel disc with floating caliper.

Wheels
Light alloy.
Front: 1.60 x 21”
Rear: 2.15 x 18”

Tyres
Front: 90/90 x 21”
Rear: 140/80 x 18”

Dimensions
Overall length: 2,222 mm
Overall width: 800 mm
Ground clearance: 396 mm
Seat height: 996 mm
Wheelbase: 1,495 mm

Dry weight
262.3 lbs (119 Kg)

Fuel tank
Capacity 7.8 litres

Colours
Aprilia Black / Fluo Red