BSA Winged Wheel W1 Instruction Manual page 5

HOW TO FIT A B.S.A. WINGED \VHEEL
TO YOUR BICYCLE.
u is quite likely that the dealer from wham'you
purchase the B.S.A. WINGED WHEEL will do
this work for you, but some users may prefer to fit
the unit themselves, 'in which case the following
notes will be 01 some help.
This work is carried out in three separate stages
which are as follows:—
Fitting the actual unit to the frame.
Installing the petrol tank.
Fixing the three control levers to the handle-
bars.
Since the machine will be ridden at much higher
speeds than when used as a normal bicycleuit will
be subyected to conSIderably greater road shocks.
It is strongly advxsed that the adjustment of the
head and front wheel bearings are carefully checked.
and that such attachments. as mudguards are made
secure. The use of spring mixers is advised.
Fitting the Unit to the frame.
The overall width of the B.S.A. \VINGED "'HEEL
i5 4vllll6' between the face 01 the cone locking
washer and the spindle locknut. This mans that
the unit will fit directly between the fork end: of a
standard bicycle. There may be a slight variation
as between one bicycle and another. amounting to
about one-eighth inch mote or less than this figure.
but the fork ends will easily spring to this extent.
If the width between the fork ends is appreciably
Ins than 4-11/16', it will not be possible to fit the
B.S.A. 'VINGED WHEEL conveniently, but if.
on the other hand. the width is somewhat grrater
than this dlmcnsivn, thnc the distam'e may be taken
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