2008 crf230l electrical charging issue

kens · 05-19-2019, 01:06 AM

Soooo I have a 2008 Honda crf230l motorcycle that the charging system works perfect IF the head lamp is disconnected and charges at 13.5 at the battery. If the headlamp is connected the dc output at the battery cannot exceed 12.3 volt...... been such a small battery it eventually leads to a battery that won’t start the bike.
ohm test of the stator seems good, ac output from all 3 legs of the stator are equal and within proper voltage, I did substitute a new bulb in place and no change, ground from headlamp plug is good.

I googled all day looking for any knowing issues and found nothing of note.

Any ideas of what is the cause? I’m leaning towards the regulator but definitely looking for information.

Weldangrind · 05-28-2019, 11:05 AM

The regulator would be my next step.

humanbeing · 05-28-2019, 06:04 PM

Battery isn't in OK condition (ie. Can't holds enough charge) meets what u say. Do a load test on the battery 1st. Stock lamp is rated 60/55W which draws ~5A

...
Manual said 0.188 kW @ 5000 rpm. DC clamp meter is a helpful tool in such case.

05-19-2019, 01:06 AM	#1
kens Join Date: Sep 2008 Location: Golden BC Posts: 123	2008 crf230l electrical charging issue Soooo I have a 2008 Honda crf230l motorcycle that the charging system works perfect IF the head lamp is disconnected and charges at 13.5 at the battery. If the headlamp is connected the dc output at the battery cannot exceed 12.3 volt...... been such a small battery it eventually leads to a battery that won’t start the bike. ohm test of the stator seems good, ac output from all 3 legs of the stator are equal and within proper voltage, I did substitute a new bulb in place and no change, ground from headlamp plug is good. I googled all day looking for any knowing issues and found nothing of note. Any ideas of what is the cause? I’m leaning towards the regulator but definitely looking for information. __________________ 2016 RX3 2009 shineray gy7 1988 BMW K75c 1987 the original TW200
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05-28-2019, 11:05 AM	#2
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	The regulator would be my next step. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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05-28-2019, 06:04 PM	#3
humanbeing Join Date: Mar 2008 Posts: 2,436	Battery isn't in OK condition (ie. Can't holds enough charge) meets what u say. Do a load test on the battery 1st. Stock lamp is rated 60/55W which draws ~5A ... Manual said 0.188 kW @ 5000 rpm. DC clamp meter is a helpful tool in such case. __________________ Last edited by humanbeing; 05-28-2019 at 09:24 PM.
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