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APRILIA AF1 250 '91 |
Loris Reggiani's machine at Suzuka
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ENGINE TYPE |
two-stroke, water cooled
twin cylinder (90º V formation)
rotary disc valve (2 rotors on the right side)
twin crankshaft (turn in opposite directions): 1 |
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BORE × STROKE |
54 × 54.5mm |
DISPLACEMENT |
249.6cm³ |
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COMPRESSION RATIO |
17:1 |
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EXHAUST DEVICE |
RAVE system
varying ex-port height by pneumatically controlled valve |
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MAX. POWER |
over 84HP at 12,500rpm |
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CARBURETTOR |
2 Dell'Orto VHSB39 flat valve carburettors |
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IGNITION |
CDI digital with battery |
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GEARBOX |
extractable 6 speeds |
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CLUTCH |
dry multiple discs |
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FRAME |
twin spar aluminium |
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SUSPENSIONS |
FRONT |
upside-down telescopic fork (White Power)
inner-tube diameter: ø40mm
adjustable spring pre-load, compression and rebound damping |
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REAR |
swing-arm and mono-shock (White Power) with linkage
adjustable spring pre-load, compression and rebound damping |
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BRAKES |
FRONT |
disc: cast-iron (ø300mm) or carbon-composite (ø275mm)
caliper: Brembo 4 pistons |
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REAR |
disc: ø190mm
caliper: Brembo 2 pistons |
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WHEELS / TIRES |
FRONT |
3.50-17 (Marvic, magnesium alloy) / DUNLOP |
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REAR |
5.00-17 (Marvic, magnesium alloy) / DUNLOP |
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DIMENSIONS |
length × height: 1970 × 1060mm
seat height: 770mm
weight: 91kg
wheel base: 1345mm
caster: 21±1º
fuel tank capacity: 21 litres |