Specification Motorcycles 2009 Aprilia RXV 5.5 Motocross Edition| ENGINE | |
| ENGINE | 77° V-twin 4-stroke, single overhead cam with rocker operated exhaust valves, chain timing drive, 4-valve heads, titanium valves |
| DISPLACEMENT | 549 cc |
| BORE X STROKE | 3.1 x 2.2 in. (80 x 55 mm) |
| COMPRESSION RATIO | 12:1 |
| FUEL SYSTEM | Integrated engine management system controlling ignition and fuel injection Throttle Body: 1.6 in. (40 mm) |
| STARTING | Electric |
| CLUTCH | Multiple disc in oil bath, cable operated |
| COOLING | Liquid |
| IGNITION | Electronic |
| LUBRICATION | Dry sump with external oil tank, separate gearbox lubrication |
| DIMENSIONS | |
| LENGTH | 87.5 in. (2,222 mm) |
| WIDTH | 31.5 in. (800 mm) |
| WEIGHT | 262.3 lbs. (119 kg) |
| GROUND CLEARANCE | 15.6 in. (396 mm) |
| WHEELBASE | 58.9 in. (1,495 mm) |
| FUEL CAPACITY | 3.3 gal. (12 l) 95 RON lead-free |
| SEAT HEIGHT | 37 in. (941 mm) |
| DRIVETRAIN | |
| TRANSMISSION | 5-speed |
| PRIMARY DRIVE | Spur gears Transmission Ratio: 22/56 |
| FINAL DRIVE | Chain Transmission Ratio: 15/48 |
| GEAR RATIOS | Enduro 1st: 12/31 2nd: 13/25 3rd: 15/23 4th: 19/24 5th: 21/22 |
| SUSPENSION | Front: 45 mm upside-down fork w/ 2 adjustments Rear: Aluminum swingarm with cast body & hydroformed members, hydraulic monoshock w/ compression & rebound adjustment |
| OTHER | |
| FRAME | Steel perimeter frame with alloy vertical members |
| BRAKES/WHEELS/TIRES | |
| BRAKES | Front: 270 mm stainless steel disc with floating caliper Rear: 240 mm stainless steel disc with floating caliper |
| WHEELS | Light alloy Front: 1.6 x 21 in. Rear: 2.15 x 18 in. |
| TIRES | Front: 90/90 x 21 in. Rear: 140/80 x 18 in. |