14.02 volts at idle increase to 5000 rpm voltage drops to 13.51 do i have a problem if so any clue as to what it may be
1984 virago 1000 that at idle is puttting out 14.02 volts .sounds good but when rpm is increased to 5000 reading on meter drops to 13.52.is this ok or do i have a problem
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the voltage should remain at 14.5 volts at all engine speeds above idle 13.9 volts at idle indicates that the alternator is charging but not at set voltage
head lights are the biggest drain that affects charge rate rate and it it maintains and from you description that is not a problem
when you select a gear it indicates a heavy drain which is a high resistance or a dead short in that circuit that is taking out more power than the alternator is charging
There there is nothing in the gear selection that draws such power
the other thing is that when selection a gear the engine rpm is tool low and the alternator stops charging
for auto vehicles , the idle rpm should be at 800-900 rpm dropping to 750-800 in drive
take a voltage indicator, and put the wires of the tool on the batery. each wire one each pole of the batery. Black to black, red to red. Turn on the engine, and increase the idle speed until aprox. 6000 rpm. the voltage indicator should indicate voltage from aprox. 12 Volts to aprox 15 volts. if the volt are not increasing with the engine rpm, is mostly a charging relay issue. At the idle speed, the voltmeter should indicate minimum 12,5 -13 volts. If not, the same issue. The test should be made with the battery charged and in great working condition.
I have a 95 yamaha virago with 12,000 miles on it. The tick is normal... The backfiring is not, back pressure is cuz of the drive shaft. I had a similar problem when cracking the throttle at a high rpm. check you plugs for fouling and gap. clean them and regap to around .030. sand inbetween the electrode and outer pin and the outer pin. if the electrode is shot replace them but remember to gap it. should fix your problem. good luck.
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