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Bridgestone 90 - All Models

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78
considered faulty. If this test was normal, check the other half of the rectifier by using the red post and
touching the yellow, blue, and white and proceed as above.
If no positive conclusion can be made from this test, substitute another rectifier and test as in #2.
7. If the charge reading is still below the 3-5 amp with the high-low charge switch in the on position and
operating the high-low charge switch from on to off does not change the charge rate (at half to full
throttle), suspect a faulty switch and connect the brown wire from the generator to the white post of the
rectifier; if charging is then correct, replace the charge switch.
8. Generator Test. The generator Can be checked with a test light. A battery operated test light should burn
when connected to any two of the yellow, blue or brown wires. The test light should not light from any
wire, (yellow, blue or brown) when the other test lead wire is grounded to the generator frame.
9. It all components seem to test satisfactory and charging is still below standard, the generator magnets
may be weak and replacement would be necessary.
10. When checking the charging system always check the terminals on the wires’ ends to make sure they
have good contact.
11. For the proper readings, always use a charged battery when testing.
12. If the charge rate is found satisfactory and battery becomes discharged, the battery may be defective
and will not hold a charge. Check the battery after fully charging it and, if the specific gravity of the
fluid is not above 1.240, the battery is probably defective. If the gravity is above 1.240 but will drop to
below this reading in 24 hours without connecting it in the cycle, the battery is defective.
13. If both the battery and the charge rate are satisfactory, suspect that the customer is running at too slow
an average speed and suggest that he operate the cycle in a lower gear to keep the engine turning faster
(especially for very slow speed city driving).
14. In some cases it has been found that a customer may ride with his foot on the brake pedal so that the
stop light burns continuously. It is recommended that the cycle not be allowed to idle more than the
normal amount necessary in operating the cycle. These practices help run the battery down and the
customer should be instructed against them.
ALL MODELS
Most troubleshooting will involve bulb replacement:
1. Head light bulb burned out ?
2. Tail light bulb burned out ?
3. Lights on in the speedometer head ?
Check the neutral gear switch by grounding the terminal screw to any convenient ground. The neutral gear
light should light when the key switch is in the 1
st
or 2
nd
position.
It's important that the spring be connected between the break light switch and the pedal. If it is necessary
to adjust the throw of the brake light switch, loosen the two adjusting nuts and move the switch either up
or down.
The horn on the B/S machines is located directly below the fuel tank. Do not adjust by turning the nut in
the center of the diaphragm on the front of the horn. The adjusting screw is located on the back of the horn.
This is the only screw or nut on the horn which should be turned.
Make certain the battery is filled properly and charged. The charge should be checked with a hydrometer.

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