Hi guys, i've been riding a Kawasaki 09 ER-6F/Ninja 650r for a year plus now and recently i realise the voltage fluctuates from 13.3 ish to 11.5 ish (plus minus 1-2)
When i turn my ignition on, the voltmeter shows a steady 12.5-12.7 on a normal day and when i crank and engine on idle voltage goes to 13.1-13.4 and when i ride off it drops abit to 12.6-12.9. Sounds normal right?
After riding for awhile like say 10-20 minutes, the voltage while im riding will start to gradually drop to 11.5-12. and then SOMETIMES it will go back up to 12.8-13.2 while riding and then it would drop again and then it would go back up repeatedly, gradually. and let say if i stop to idle after a long 20-30 mins ride, the idling voltage will be around 11.1-11.7. The worst i've seen it go was 10.9.
Usually this happens on long 20-40 mins rides. The voltage fluctuations are not so bad on my daily 10-15 mins ride to work, at most it'll drop to around 11.9-12.2 by the time i reach work.
I also now frequently (once every 1-2 days) idle my bike so as to charge my battery back up because if not i realise my ignition voltage will drop to 12.4-12.5. If i charge, my ignition voltage will be around 12.6-12.8.
Just some additional info:
- my last battery change was around 1 year 6 months ago by previous owner, currently using some lithium battery
- my only electrical accessory is my SPY 2 way alarm, used to have 2 pairs of additional lights but i disconnected them long ago
- recently changed my stock bulbs to Osram night racer
- magnet coil have been changed before in 2011-2012 (previous owner)
Anyone with similar experiences? Maybe time for me to change my battery?
Any opinions and suggestions are GREATLY appreciated!