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E. Selenium Rectifier:
As the dynamo mounted on this motorcycle is a six pole type AC
Dynamo with large output, a selenium rectifier with a large area is
used. The three phase bridge all-wave rectifying system is used, so
that charging performance is excellent. As show in the illustration,
the charging current flows in the direction indicated by a solid
arrow during half a cycle and in the next half cycle flows in the
direction indicated by a broken arrow. Charging current always
flows in the same direction and the AC current is rectified most
effectively.
Care must be taken to prevent
high temperatures in the
rectifier, wetting with water
and handling. No trouble from
high temperatures will be
experienced if the rectifier is
mounted in a properly
ventilated position. Take care
not to wet the rectifier when
washing the motorcycle.
If the dynamo operates
with the secondary circuit
(DC side) of the rectifier disconnected and voltage rises too
high, sparks will be generated in the synthetic materials in the
layers of the selenium rectifier.
Spots where sparks are generated will be burned and electrical
current will flow in the reverse direction through the burned
parts so that electrical current from the battery will flow to the
ignition coil when the engine stops. This will decrease the
magnetic power of the generator. Take care not to run the
engine with the selenium rectifier disconnected.
F. Battery:
AC current generated by the AC Dynamo is rectified to DC current by the selenium rectifier and charged
into the battery. All current for operation of the motorcycle flows from the battery. The battery should be
kept in good condition at all times since electricity for all electrical equipment is supplied by the battery.
The capacity of the battery is 12 V-6 AH. The battery should be checked periodically by the rider or the
dealer. (See charging specifications for all models in opposite column.)
G. Headlight:
The headlight includes a 12 V, 35 W main beam and a 12 V, 25 W dim beam. The battery is the electric
source for the headlight. Riding will be dangerous at night if obstacles cannot be seen clearly. As the
headlight of the Bridgestone DT is operated on battery current, it remains bright regardless of engine speed
and riders can enjoy safe riding at night.
H. Spark plugs:
NGK B-8H spark plugs are standard for the Bridgestone 175 DT. Be sure to use the proper spark plugs as
the engine cannot develop 100 percent performance if an incorrect spark plug is used. The spark plug is
proper for the engine when the spark plug insulator is light brown in color. If the insulator is black or
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