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Aprilia RS 250

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Make Model

Aprilia RS 250

Year

1998 - 99

Engine

Two stroke, 90° V twin-cylinder, with laminar suction and exhaust valve. Separate lubrication with variable automatic mixer

Capacity

249 cc / 15.2 cu in
Bore x Stroke 56 x 50.6 mm
Cooling System  Liquid cooled
Compression Ratio 12.0:1 (+/- 0.7)
Lubrication Oil pump with separate circuit

Induction

2 x Ø34 mm Mikuni 34 SS flat side carburetors
Fuel Type Lead-free petrol, R.O.N. minimum 95
Engine Oil Recommendation IP MAX 2T COMPETITION, or any high-quality oil meeting the ISO-L-ETC++ or API TC++ specifications

Air Filter

With polyurethane filter element
Ignition CDI
Battery 12V 4Ah
Starting Kick

Max Power

52.9 kW / 72.5 hp @ 11900 rpm

Max Power Rear Tyre

47.2 kW / 64.3 hp @ 10400 rpm

Max Torque

40 Nm / 4.08 kgf-m / 29.5 lb/ft @ 10750 rpm
Clutch Oil bath, multiple-disc, with lever control on handlebars

Transmission 

6 Speed, direct drive
Gear box oil Recommendation IP FC, SAE 75W-90, or any high-quality oil meeting the API GL-4 specification
Final Drive Chain, sealed, jointless, DID 520 V6
Gear Change With pedal (L), 1st low, other 5 high
Final Reduction 14:42 (1:3.0)

Gear Ratio

1st 11:27 (1:2.454) / 2nd 16:26 (1:1.625) / 3rd 17:21 (1:1.235) / 4th 22:23 (1:1.045) / 5th 24:22 (1:0.916) / 6th 25:21 (1:0.840)

Primary Reduction 23:59 (1:2.565)

Front Suspension

Ø40 mm Inverted fork with adjustable rebound and compression damping.
Front Wheel Travel 120 mm / 4.7 in

Rear Suspension

Magnesium alloy swingarm. Monoshock with resevoir, adjustable extension, compression and spring preloading.
Rear Wheel Travel 130 mm / 5.1 in

Front Brakes

2 x Ø298 mm discs, 4 piston calipers

Rear Brakes

Single Ø220 mm disc, 2 piston caliper
Front Wheel 3.50 x 17
Rear Wheel 4.50 x 17

Front Tyre

120/60-17

Rear Tyre

150/60-17
Rake 25°
Turning circle Ø 4.09 m / 13.4 ft
Dimensions Length: 1880 mm / 74.0 in
Width:    690 mm / 27.2 in
Height: 1080 mm / 42.5 in
Wheelbase 1370 mm / 53.9 in
Seat Height 810 mm / 31.9 in
Ground Clearance 135 mm / 5.3 in

Dry Weight

141 kg / 309 lbs
Wet Weight 167 kg / 368 lbs

Fuel Capacity 

16.5 Litres / 4.4 US gal
Reserve 3.5 Litres / 0.9 US gal

Braking 60 km/h / 37 mph - 0

12.9 m / 42.3 ft

Braking 100 km/h / 62 mph - 0

36.8 m / 120.7 ft

Standing ¼ Mile  

12.50 sec / 172.5 km/h / 107.2 mph

Top Speed

209.5 km/h / 130.2 mph
Road Test Tuttomoto Test

Bimota V-DUE vs Suzuki GSX-R750WT vs Aprilia RS250

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The RS250 was designed by Aprilia to resemble their GP250 bike to celebrate their success in the championship. The Aprilia RS250 is powered by a modified Suzuki RGV250 (VJ22) engine which is prepared by Aprilia, changes include a revised ECU, Aprilia-designed expansion chambers, barrels and airbox. The twin 34 mm flat slide Mikuni carburettors are retained from the RGV.

Chassis

The frame is a cast twin spar aluminium/magnesium alloy with thin-walled monocoque reinforcements, with the engine as a fully stressed member manufactured by Benelli for Aprilia. The banana swingarm is made out of the same polished aluminium alloy as the rest of the frame. The reason for the swingarm's banana shape is to allow the expansion chambers to run unobstructed under the engine to improve ground clearance in turns.

The forks are 41 mm Showa (on the MY98+ models) inverted units and are adjustable compression and rebound, the rear suspension is a Sachs mono-shock which is adjustable for preload, compression and rebound. The front brakes of the RS 250 are Brembo dual 298 mm discs with Brembo Oro four-piston calipers. The rear brake is a single 220 mm disc with a Brembo twin-piston caliper.

The front & rear rims are lightweight, 5 spokes, cast aluminum rims are 3.50x17 up front (3.0x17 on the older models) and 4.50x17 out back that require tires of 120/70x17 and 160/60x17, respectively.

Instrument panel

The RS gauges feature a digital instrument panel that gives the rider a variety of information. It will display maximum and average speed readings in kilometers or miles per hour, an adjustable rev limiter warning zone indicator, water temperature in choice of scale, battery charge indicator, a clock, and a chronometer that can remember up to 40 lap times.

Revision

In 1998, Aprilia released an all new look for the RS250, also referred to as RS250GP1 to celebrate Aprilia's victory in the 250 cc GP racing class. Its appearance is similar to Marco Melandri's RSWGP250 bike, with the same engine and frame as the pre-1998 model. The bike has a dummy ram-air intake. Changes include:

- Revised overall bike styling with more modern senses.
- New Showa front forks and adjustable rear ride height
- New style instrument panel with new functionality.
- New rims and tyres: the front rim is now a 3.5x17, instead of 3.0x17 as used on pre-1998 model. The front tire is a 120/60x17 instead of the 110/70x17 mounted on the pre-1998

Source Wikipedia