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Information: Aprilia AF1 Futura2 - Technical features
Motor
Type : 2 stroke single-cylinder with lamellar inlet and valve on the exhaust port.
Liquid cooling. Separate lubrication by means of an automatic mixer (variable 0.9-2%).
Cylinder ......................................................................Light alloy with GILNISIL surface coating
Bore and stroke ..........................................................54 x 54.5mm
Compression ratio .......................................................13.6:1
Port diagrams
- inlet ..........................................................................174°
- transfer .....................................................................120°
- exhaust .....................................................................164.2° Rave valve closed
- exhaust .....................................................................187.8° Rave valve open
Carburettor
Model .........................................................................Dell''Orto VHSB 34 LD
Choke tube dia. ...........................................................34mm.
Max. jet .......................................................................148
Min. jet ........................................................................36
Atomizer ......................................................................DP 266
4th nocht needle ...........................................................K56
Gas valve .....................................................................40
Air screw .....................................................................1 turn
Starting jet ...................................................................60
Float ............................................................................9 gr
Ignition
Electronic .....................................................................SEM
Spark advance refence .................................................12° at 10,000 rpm
Spark plug ...................................................................NGK B 10 EG
Fuel
Fuel tank
capacity .......................................................................14.5 lt. of which 3 lt. electric reserve and 1 mechanical reserve.
Oil tank capacity for mixture .........................................1.5 lt. of which 0.35 lt. reserve.
Lubrication
Gearbox & transmission ................................................1.000 cc oil
Cooling circuit capacity .................................................800 c.c. (mixture of water and 30% liquid antifreeze, minium working temperature -17°C).
Starting
Electric by means of a pushbutton on the right-hand side.
Clutch
Multiple disc in an oil bath.
Gears
6 speed unit
Gear ............................................................. No. teeth
1st - 3,4 ......................................................... 10:30
2st - 2,308 ..................................................... 14:29
3st - 1,688 ..................................................... 17:27
4st - 1,316 ..................................................... 19:25
5st - 1,142 ..................................................... 24:21
6st - 1,045 ..................................................... 23:22
Transmission
Primary .........................................................................with gears, ratio 3.2 (Z = 20/64)
Secondary .....................................................................5/8" x 1/4" chain
Frame
Double cradle aluminium load-bearing structure.
Swing-Arm
Rectangular section steel mounted on roller-bearings.
Suspension
Front ............................................................................"Upside-down" fork with central pin x40, travel 120mm. 350cc in each tube.
Rear .............................................................................A.P.S. (Aprilia Progressive System) with hydraulic single shock-absorber
Brakes
F
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