is my battery or charging system broken? O.o By racerx125 (Read 2,316 times)

[racerx125]

Well I noticed my lights dimming when I start accelerating and come back when I am idling so I checked my battery using a multimeter and when key is closed it reads 13.10 Volts, with engine idling says 12.20, when revving engine to where lights dim a little 6.10 Volts! O.o After i let accelerator go comes back to 12 Volts and lights come back bright. So is my battery or charging system broken?
Battery: Duralast 12V 9Ah
Headlight bulbs are 2 35/35 watt light bulbs

Any ideas? or is my Multimeter crazy?

[scot]

it sounds like you rr voltage regulater rectifyer,could be bad i guess alot of guys have replace them ,i am sure others will chime in an help ,the cdi as well ,sounds like your battery is fine though ,,,there is few diffrent things to check ,i could be negative wire loose to the frame ,try starting it ,then take battery out ,if it stops running probley rr ,i think they say its on right side behind the plastic ,need to test it to ,an check for any loose wireing

[racerx125]

well I removed the negative battery cable and and positive cable fuse and it still stayed on but with flickering lights which I assume is normal right?

[ellpee]

That says the Stator/RR/CDI system is functioning, but what happens under those conditions if you rev the engine? If everything works as it should, lights stay bright, engine revs smoothly, then time to start looking for loose connectors, bad grounds. If, with battery disconnected like that, the lights dim or the scoot stumbles or dies when revving, then what's coming out of that charging system is inadequate or intermittent or both for some reason. There too, it could just be a loose connection or poor ground somewhere, no need to assume from jump that one of the gizmos needs to be replaced. You didn't way what scoot you have, on my 2011 Roketa all that charging stuff is under the right side plastic (or was until I relocated it to the under-seat compartment).

[scot]

someone had said could be the ground to the frame ,as if it was painted may not be getting a good ground ,check it ,an remove any paint put back on an see

[racerx125]

I finally finished cleaning and rewiring harness and connectors on the entire motorcycle its a DF250RTC Brand Dong Fang
and still headlights and instrument lights dim while brake lights and turn signals stay same. I also found that when lights are dimmed during acceleration that if I press the brake handle brake light brights up and so do the headlights

[scot]

your rideing it ,an the battery has not gone dead ,then I would check the cdi,not sure whear it is on that bike

[alleyoop]

Jan 19, 2014 15:01:24 GMT -6 racerx125 said:

I finally finished cleaning and rewiring harness and connectors on the entire motorcycle its a DF250RTC Brand Dong Fang
and still headlights and instrument lights dim while brake lights and turn signals stay same. I also found that when lights are dimmed during acceleration that if I press the brake handle brake light brights up and so do the headlights

That symptom points to the R/R being bad.
Alleyoop

[ellpee]

Alley: for doofuses like me, can you maybe explain WHY it points to the R/R? If it runs with the battery completely out of circuit, clearly the R/R must be putting out juice. Brightening of headlights and instrument lights when he squeezes the brakes seems completely counter-intuitive, as if adding the brake circuit into the "mix" is somehow REMOVING a current leak from the picture, but how the heck can that be? On the road, is the R/R intended to handle all current demands as part of its normal functioning? Or is the R/R just supposed to carry the steady-state load, with the battery picking up the difference when extra gizmos are turned on? Looking at the fusebox and my wiring diagram, I see that "all lights" are supposedly fed from the R/R when the engine is running, but on the other hand there are individual fuses for various lights and gadgets that feed off the battery. Just trying to learn more here, and it's all relevant to my own ongoing charging system issues. Headlights on or off, brights on or off, fan on or off, all are players in my own situation, so I continue trying to get my mind around how all this works.

[racerx125]

Jan 21, 2014 10:06:49 GMT -6 ellpee said:

Alley: for doofuses like me, can you maybe explain WHY it points to the R/R? If it runs with the battery completely out of circuit, clearly the R/R must be putting out juice. Brightening of headlights and instrument lights when he squeezes the brakes seems completely counter-intuitive, as if adding the brake circuit into the "mix" is somehow REMOVING a current leak from the picture, but how the heck can that be? On the road, is the R/R intended to handle all current demands as part of its normal functioning? Or is the R/R just supposed to carry the steady-state load, with the battery picking up the difference when extra gizmos are turned on? Looking at the fusebox and my wiring diagram, I see that "all lights" are supposedly fed from the R/R when the engine is running, but on the other hand there are individual fuses for various lights and gadgets that feed off the battery. Just trying to learn more here, and it's all relevant to my own ongoing charging system issues. Headlights on or off, brights on or off, fan on or off, all are players in my own situation, so I continue trying to get my mind around how all this works.

ellpee its true the R/R keps my motorcycle running but without battery in the circuit at the same time with R/R the entire lighting system flickers and dim and my engine almost wants to stall but its bearly hanging.
I forgot to emntion that during the months my my motorcycle was left outside parked for harness problems the cover I put on slipped off and it had no fairings and R/R was uncovered when raining started pouring. Could that may affected my R/R?

[ellpee]

I have no idea whether this will add anything to the diagnostic process, but have you put your multimeter on the "out" side of the R/R (wire that goes to battery+ by way of the diode or relay) to see what voltage is being passed thru? If I'm remembering correctly I did that recently with mine and was seeing 13+, a little upward variation but not all that much when I revved the engine. I posted that here and nobody said it was a bad reading, so I'm assuming it was good.

I daresay getting rained on was probably not a good thing in general, but on mine the R/R is pretty much a sealed unit except for the connections.

[racerx125]

Jan 22, 2014 9:45:37 GMT -6 ellpee said:

I have no idea whether this will add anything to the diagnostic process, but have you put your multimeter on the "out" side of the R/R (wire that goes to battery+ by way of the diode or relay) to see what voltage is being passed thru? If I'm remembering correctly I did that recently with mine and was seeing 13+, a little upward variation but not all that much when I revved the engine. I posted that here and nobody said it was a bad reading, so I'm assuming it was good.

I daresay getting rained on was probably not a good thing in general, but on mine the R/R is pretty much a sealed unit except for the connections.

I will try and check the R/R using a multimeter and my R/R is those black finned sealed units with 3 yellow and 3 different colors so 6 wire

[scot]

the voltage regulater RR ,is there to keep electrical currants even ,from surgeing or diping Allyoop is right,its sounds like diping,the cdi compastitor discharge ignition ,is made up of a transformer a rectifier compasitor,an a number of circuits ,capable of making high spark.for strong combustion ,it needs good flow of power from the scooters battery. wich is fed to different components on the scooter ,the stator ,wich is made up of many metal wires wound together ,that give power back to the battery the magnets spin generateing power thoughout the scooter ,wich is attached to the crankshaft .is housed within the stator,as the flywheel spins it produces an alternating current that is fed back to the battery making up the scooters charging system.often the rr was to weak from china so alot of guys are replaceing them ,so one thing at a time ,if the rris good then next check the stator,its also helps to check youtube an get the info I got above ,how it works ,so we are all learning together

[racerx125]

Before my harness got fried my lighting was perfect and bright after my harness got burned and my motorcycle was left parked outside opened up for nature to play with it and when I finally fixed everything my lights where not as bright as before and my headlights are just bright enough to lights 1 meter in front of me on the darkest streets, but before replacing my R/R I will check it because my pockets are currently running low until next month

[scot]

it sounds like checking everything possible before buying parts is right ,an yes leaveing outside could have very well not helped ,keep us updated