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History
End of the line...Apparently because of Suzuki's ceasing production of the VJ22 RGV250 engine, due to tightened emissions regulations, Aprilia stopped making RS250s in 2003, and the bikes were no longer allowed to be sold as new in Europe as of early 2004.
Models
According the the Aprilia parts catalogues, the second generation RS250 was produced with several different color schemes, on average two color schemes per model year:
| Year | Color 1 | Color 2 |
| 1998 (W) | Aprilia black | Trial red/Cosmos blue |
| 1999 (X) | Aprilia black | Fumi blue/Fluo red |
| 2000 (Y) | Aprilia black | Nik grey |
| 2001 (1) | Diablo black | |
| 2003 (3) | GP1 | |
| (Challenge version USA) |
Model letters used by Aprilia appear to correspond with the VIN model letters used in the United States since the early 1980s. (Here is a bit more about VINs.) As a result, bikes manufactured in 1998 carry the model letter "W", 1999 bikes are "X" models, 2000 bikes are "Y" models, 2001 bikes are "1" models, and 2003 bikes are "3" models. (The letters "I", "O", "Q", "U" and "Z" are not used in the VIN system.)
Specifications
| Item | Technical specifications | |
| Sizes and Weights: | Maximum length | 1,975mm ('94-'97: 1,980mm) |
| Maximum width | 690mm | |
| Maximum height (front cowling) | 1,180mm ('94-'97: 1,090mm) | |
| Height (seat) | 810mm | |
| Wheelbase | 1,360mm ('94-'97: 1,370mm) | |
| Minimum ground clearance | 135mm | |
| Turning circle | 4,090mm | |
| Weight (wet) | 167kg | |
| Maximum load (driver + passenger + luggage) | 160kg | |
| Seats | 2 | |
| Engine: | Type | 90-deg. V, 2-cylinder, 2-stroke with laminar suction and exhaust valve. Separate lubrication with variable automatic mixer (0.9/2%). Liquid cooling. |
| No. cylinders (V 90-deg.) | 2 | |
| Cylinder lettering |  |
|
| Total displacement | 249.25cm³ ('94-'97: 249cm³) | |
| Bore x stroke | 56.0mm x 50.6mm | |
| Compression ratio | 12.00 (+/- 0.7) : 1 | |
| Starting | kick-start | |
| Carburetors: | Carburetor type | 2 MIKUNI TM 34 SS |
| Choke tube | 34mm dia. | |
| Air filter | With polyurethane filter element | |
| Lubrication system | Oil pump with separate circuit | |
| Engine oil recommendation | IP MAX 2T COMPETITION, or any high-quality oil meeting the ISO-L-ETC++ or API TC++ specifications | |
| Cooling system | Liquid with pump | |
| Transmission: | Clutch | Oil bath, multiple-disc, with lever control on handlebars |
| Gear box oil recommendation | IP FC, SAE 75W-90, or any high-quality oil meeting the API GL-4 specification | |
| Gear box | 6-speed, direct drive | |
| Gear change | With pedal (L), 1st low, other 5 high | |
| Primary reduction | Z = 23/59 (1 : 2.565) | |
| Final reduction (chain) | Z = 14/42 (1 : 3.000) | |
| Gear ratio, 1st | Z = 11/27 (1 : 2.454) | |
| Gear ratio, 2nd | Z = 16/26 (1 : 1.625) | |
| Gear ratio, 3rd | Z = 17/21 (1 : 1.235) | |
| Gear ratio, 4th | Z = 22/23 (1 : 1.045) | |
| Gear ratio, 5th | Z = 24/22 (1 : 0.916) | |
| Gear ratio, 6th | Z = 25/21 (1 : 0.840) | |
| Chain | Sealed, jointless, DID 520 V6 | |
| Refuelling: | Fuel tank capacity (including reserve) | 19.5 liters ('94-'97: 16.5 liters) |
| Reserve | 3.6 liters ('94-'97: 3.5 liters) | |
| Type of fuel | Lead-free petrol, R.O.N. minimum 95 | |
| Fork oil | 431cc (each fork tube) ('94-'97: 420cc (left tube with spring); the right tube with hydraulic damper must be filled to 6cm from the top (with stanchion fully compressed and cartridge fitted)) | |
| Fork oil recommendation | IP FA 5W or IP FA 20W (which can be mixed to create 10W or 15W, if needed) | |
| Gear oil | 0.7 liters | |
| Oil mixer (including reserve) | 1.6 liters | |
| Oil mixer reserve | 0.3 liters ('94-'97: 0.6 liters) | |
| Coolant | 1.9 liters (0.95 liters distilled water + 0.95 liters coolant) | |
| Chassis: | Type | Double-beam with cast and stamped sheet elements |
| Caster angle | 25-deg 30' | |
| Trail | 102mm | |
| Front suspension | adjustable telehydraulic fork with helical spring and upside-down tubes, travel 120mm | |
| Rear suspension | Rocker arm with adjustable hydraulic single shock absorber, stroke 64mm ('94-'97: wheel travel 130mm) | |
| Front brake | Twin disc, 298mm dia., with hydraulic circuit | |
| Rear brake | Disc, 220mm dia., with hydraulic circuit | |
| Wheels (light alloy) | Front: 3.5 x 17 in. ('94-'97: 3.0 x 17 in.); rear: 4.5 x 17 in. | |
| Front tyre | 120/60-ZR17 ('94-'97: 110/70-ZR17) | |
| Rear tyre | 150/60-ZR17 ('94-'97: or 160/60-ZR17) | |
| Inflation pressure (cold) | Front: 190 kPa (1.9 bar); rear: 220 kPa (2.2 bar) | |
| Inflation pressure (cold, with passenger) | Front: 190 kPa (1.9 bar); rear: 240 kPa (2.4 bar) | |
| Ignition: | Type | C.D.I. |
| Spark advance | 10-deg (+/- 2-deg.) B.T.D.C. ('94-'97: 14-deg. B.T.D.C. @ 1,300rpm) | |
| Spark plug (standard) | NGK BR9ECM | |
| Spark plug (racing) | NGK BR10ECM | |
| Spark plug (cold climate) | NGK BR8ECM | |
| Spark plug gap | 0.7-0.8mm | |
| Idle speed | 1,300 rpm (+/- 100 rpm) ('94-'97: 150 rpm | |
| Electric system: | Battery | 12v 4Ah |
| Fuses | 20 - 15 - 7.5A | |
| Generator | 12v-180W | |
| Lamp | Dipped beam | 12v-55W H1 |
| High beam | 12v-55W H3 | |
| Parking light | 12v-5W | |
| Turn indicators | 12v-10W | |
| Rear parking/number plate/brake | 12v-5/21W | |
| Numberplate light ('94-'97 only) | 12v-5W | |
| Tachometer light | 12v-2W | |
| Multifunction computer display | 12v-2W | |
| Warning lights | Neutral | 12v-3W |
| High beam | 12v-3W | |
| Stand down | 12v-3W | |
| Turn indicators | 12v-3W | |
| Oil mixer level | Red LED | |
| Redline | LED | |
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Copyright © VSource.org 1999-2011 [Source: Aprilia Workshop Manual 945W (2nd edition, 10.98, includes 1998 model year update pages), pn. 8140159] |