Curtis87
CB750 Enthusiast
My dad has an 80 custom, he has a voltmeter installed and is getting 15.1v reading anytime he is on the throttle after 2000rpm. At idle it is fairly normal around 12.5. Any ideas ? Thanks guys
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Help for my dad! Voltage 1980 custom
- Thread starter Curtis87
- Start date
amc49
CB750 Guru
Could be simple voltmeter variance. Try more than one reading device. If anything the systems don't charge rather than too much. And 12.5 is NOT normal, the charging volt must always be HIGHER than the battery volts, being the same means there is a problem. Looking for closer to 14 there, it will run all day long like that. At 12.5 all the time the battery will run down in short order. They generally stay happy at 13.5 volt or higher averaged out. 13.5 to 14.5 is happyland, I don't care for 15 but it could work if it never goes any higher than that. Why I say check with something else.
The early DOHC does not fully charge at idle, it only does enough to stave off battery running down about 2000-2500 rpm, the crossover point. Why you don't idle for long periods.
The early DOHC does not fully charge at idle, it only does enough to stave off battery running down about 2000-2500 rpm, the crossover point. Why you don't idle for long periods.
amc49
CB750 Guru
http://www.cb750c.com/publicdocs/charging_system/genesound_charging_system.html
Go to 'testing instructions' lower down and 1c and 1d. Read as well in there about 'perfect world' results.
Go to 'testing instructions' lower down and 1c and 1d. Read as well in there about 'perfect world' results.
