5 MOTORCYCLE ELECTRIC SYSTEM
5.1 Circuitry
5.1.1 Generator complemented with engine CJ-750 is a positively
grounded DC generator MZF-12, whose rated power is 65w, rated voltage is 6v. The
motorcycle circuitry is given in Fig 14.
5.1.2 Generator MJF-280B complemented with engine CJ-750MIM is a
negatively grounded AC generator, whose rated power is 280w, rated voltage is
12v. The motorcycle circuitry is shown in Fig 15.
5.2 Control Switch Operating
5.2.1 Ignition switch
For daytime operation, insert a key into the switch and turn it counter
clockwise to cut in switch contacts 1and 3.
Then power source supplies power to such electrical parts as ignition switch,
horn pushbutton, turn switch, brake signal switch and starting pushbutton.
For night operation, insert a key into the ignition switch and turn it clockwise
to cut in switch pins 1 to 3. Then power source supplies power to all power
consuming parts.
5.2.2 Three-Position switch
5.2.2.1 Lighting control switch-three-position switch, i.e. HIGH BEAM, LOW
BEAM and FRONT LIGHT. When lighting control switch is set to HIGH only high beam
light comes on. When it is set to LOW, only low beam light comes on. And when it
is set to FRONT LIGHT, only front light comes on.
5.2.2.3 Horn pushbutton
When it is pressed down, the horn operates and when it is released, the horn
stops operating.
5.2.2.4 Turn light switch-when it is turned to left, left turn light
comes on and to rights, right turn light comes on.
5.2.3 Electric starting pushbutton -press down this button is to conduct
electric starting. Attention should be paid not to making continuous starting for
over 3 seconds, otherwise the battery may be damaged.
5.3 Battery Servicing
The battery used on CJ-750 engine powered motorcycle is lead acid battery 3-M-14, whose voltage is 6V. The one used on CJ-750D engine powered motorcycle is dry storage battery 6-MA-28 whose voltage is 12 V.
5.3.1 Make up electrolyte with relative density of 1.28+/-0.01g/cm3 (
measured at 15
) by mixing distilled water or purified
water with pure battery sulphuric acid.
5.3.2 Clean battery surface, take off electrolyte filling cap, make air
vent unblocked and pure the ready-made electrolyte into the battery to a level
of 5-10mm above the plate.
5.3.3 The dry storage battery 6-MA-28, after being charged with
electrolyte, should be put at a standstill for 20 min. before operation. The
exterior of the battery should be cleaned with water and electrolyte filling cap
tightened before operation.
5.3.4 The lead acid battery 3-M-14 should be recharged for 3-5 hours
after filling electrolyte. The current for the first phase of recharging is
0.8A. The current can be changed to 0.4 A when voltage of each cell reaches to
2.4V. The charging can be stopped when charging voltage and electrolyte relative
density keep unchanged for 3 hours.
5.3.5 In charging the positive pole of the battery should be connected to
positive pole of DC power source and the battery negative pole to negative pole
of DC source. At the same time, electrolyte filling cap should be removed to let
gas escape. The charging should not be done near tinder to avoid causing
explosion. If temperature of electrolyte exceeds 45 , the
battery should be cooled and then charged again.
5.3.6 If it is found that the electrolyte level is lower than plate in
charging or using of battery, distilled water or purified water should be added.
5.3.7 On completion of charging, tighten the electrolyte filling cap and
clean exterior of the battery with water.
5.3.8 The battery should be kept at dry and well-ventilated place, Fall, impact
and upside-down store of the battery are strictly forbidden.
5.3.9 The battery plate should be cleaned frequently as it is corrode
easily, the battery wires after being secured should be coated with Vaseline or
grease.
5.3.10 The dry storage battery can keep its dry charge within half a year.
It should be recharged for 20 hours with 3A current if it is kept for over half
a year. The battery should be stored in full-charged state.
Recharge the battery if it has been stored for one month or after being
discharged.
