firefly
Well-Known Member
Having an on board voltmeter is a must on max with its lousy harness & charging issues, a volt meter gives a good idea of what's happening with charging & is early warning for pending failures.
I noticed that when the fan comes on volts drop a little (0.15) at idle but above 1500 RPM it has very little effect on voltage, the headlight is a current hog, its the most current draw in the entire bike a 0.30 volt drop is common even above 1500RPM.
a volt meter also shows if the battery is on its way out since you can monitor how well the battery holds the charge & how much voltage drop happens during starting, less than 10 volts means up coming battery trouble enough warning time to order a battery & not get stranded with a dead one away from home.
During long storage a battery should not be allowed to drop below 12 volts or else it goes into deep discharge which many batteries can't handle well & will never get fully charged again.
http://www.cyclemaxohio.com/inc/sdetail/4231
I noticed that when the fan comes on volts drop a little (0.15) at idle but above 1500 RPM it has very little effect on voltage, the headlight is a current hog, its the most current draw in the entire bike a 0.30 volt drop is common even above 1500RPM.
a volt meter also shows if the battery is on its way out since you can monitor how well the battery holds the charge & how much voltage drop happens during starting, less than 10 volts means up coming battery trouble enough warning time to order a battery & not get stranded with a dead one away from home.
During long storage a battery should not be allowed to drop below 12 volts or else it goes into deep discharge which many batteries can't handle well & will never get fully charged again.
http://www.cyclemaxohio.com/inc/sdetail/4231