BSA Winged Wheel W1 Instruction Manual page 38

Occasionaiiy clean the contacts by inserting a
dry smooth piece of paper between them and
withdrawing while the contacs are in the closed _
position. Do not allow the engine to run with oil
or petrol on the contacts or they will start to burn
and blackcn. If they do. lightly polish with a
piece of smooth emery cloth. and wipe clean.
Adjustment of Contact Breaker Points.
Turn the engine over until the breaker points are
seen to be {11in open through the aperture A in the
flywheel (Fig. 15), and measure the gap with a
[eeler gauge. It should be .018in. II the point:
need adjusting, loosen the screw 3 which lacks the
breaker plate and move the latter, to give the
proper point setting, by turning the eccentric
headed screw C. Then lack the plate securely
again by tightening screw B. The breaker plate
moves abOut the axis of the breaker arm stud and
thus ensures proper alignment 0! the contact surface.
The breaker point setting should only be adjusted
in the manner described and AT NO TIME SHOULD
THE FIXED CONTACTS BE LOOSENED OR
THE BREAKER ARMS BENT TO PROVIDE
ADJ USTMENI'.
The moving contacts are integral With the
breaker arms. If the contact points need replacing
it is recommended that both the fixed and movable
points be replaced at the same time.
If the magneto reqmres any attention beyond
that described above, it is recommended that the
complete machine should be sent to u: or to an
authorised WIPAC srrvice station.
MILLER ELECTRICAL EQUIPMENT.
It may be lound that a magneto of Miller menu-
{acture is fitted. A special instruction booklet is
37