Aprilia RXV

Aprilia RXV/SXV 4.5-5.5
Manufacturer	Aprilia
Parent company
Production	2007-
Predecessor
Successor
Class	Enduro/Supermoto
Engine	RXV/SXV 4.5: 449 cc twin-cylinder 77° v-twin dry sump water-cooled four stroke with 12.5:1 compression ratio. RXV/SXV 5.5: 549 cc twin-cylinder 77° v-twin dry sump water cooled four stroke with 12:1 compression ratio.
Power	Manufacturer's claim at the crank: 60 hp for the RXV/SXV 4.5, 70 hp for the RXV/SXV 5.5. Rear wheel power measured stock on a Dynojet ATV: 54.3 hp at 11000 rpm for the SXV 4.5, 65.9 hp at 10900 rpm for the SXV 5.5.
Torque	NA
Fuel system	fuel injection, throttle body diameter: 38 mm for RXV/SXV 4.5, 40 mm for RSV/SXV 5.5.
Transmission	5-speed manual with separate gearbox lubrication, final chain drive
Suspension	Front: 48 mm upside down fork with two adjustments. Rear: hydraulic monoshock with compression and rebound adjustment.
Brakes	double oversize disc, wave rotors
Tires	120/70 x 17 inches, 180/55 x 17 inches
Rake trail	NA
Wheelbase	1495 mm (58.86 inches)
Length	2222 mm (87.4 inches)
Width	800 mm (31.5 inches)
Seat height	918 mm (36.1 inches)
Height	1300.5 mm (51.2 inches)
Dry weight	268lb
Wet weight	NA
Fuel capacity	7.8 liters (2.0 gallons)
Related	Husqvarna SM 510R, KTM 690 SMC, Suzuki DR-Z400SM

Aprilia RXV

The Aprilia RXV/SXV series are four-stroke, v-twin, off-road motorcycles produced by Aprilia. They are available in several models, including an enduro (RXV) and supermotard (SXV). The bike was introduced in 2006.

Frame/chassis

The RXV/SXV's frame is made of a combination of tubular steel and aluminum plates. The compact engine fits into the frame in such a way that the air filter sits on top of the engine, below the gas tank, rather than the more traditional under-the-seat location. This allows for a lower distribution of weight.

Engine

The RXV/SXV has a v-twin engine, and is one of the first off-road motorcycles to feature fuel injection. The 4.5 has a displacement of 449 cc, while the 5.5 has a displacement of 549 cc. Each engine has a single-overhead cam and four valves per cylinder. The 77 degree cylinder angle minimizes vibration. Both are dry sump, with a separate oil tank for the gearbox and engine.

The 4.5 produces a claimed Template:Convert/hpTemplate:Convert/test/A at the crank, while the 5.5 produces a claimed 70. Unfortunantly, horsepower measured at the crank is of little use to the average rider; horsepower measurements are much more accurate when taken at the rear wheel with a dynomometer.