Ongoing Charging Issues By cirnobyl (Read 1,352 times)

[cirnobyl]

I have a 2006 Viva Roadster, at least I think so since it had yellow tape spelling the word viva on it. I'm pretty sure it does NOT have a CF250 engine. It has a CN250 because when I went to replace the clutch with one made for a cf250, it didn't fit. The people who sold it to me told me I likely had a CN250. Tried the CN250 clutch and it worked. Other things to know: It has 30w HID lights installed, a performance CDI, new stator and thats all thats pertinent to my problems. I don't think the lights are my ultimate problem though. Even when I had the OEM stock lights it gave me this issue, it just lasted a little longer between charges.

So the problem is If I run it for over a hour, it comes home with a drained battery that won't start again till its charged. I even keep a battery charger under my seat so I won't get stranded. Here is what I know: three yellow wires run from the engine case to the regulator. Each shows a voltage of 16.5 volts AC when idling. It does not seem to fluctuate when I gun it. At the battery, I see a idling voltage of 12.08 volts. Again gunning the engine doesn't seem to help. Also this is with a near dead battery, not fully charged. Lastly disconnecting the lights caused the voltage to go up by .4.

I'm sort of suspicious of the stator I put in because I noticed one of the copper wires that was running from one post to another was touching the silvery metal base. I tried to bend it out but the copper is very stiff and brittle and I didn't want it to snap. The old stator put out 14-15 volts AC with more irregularity which is why I replaced it. The stator I bought was meant for a CF250 though. Maybe the CN250 requires a different stator? They looked identical except the orignal had a longer wire. As far as replacing the regulator, which one should I get? I can't find a site that lists my parts by model so I have to go by engine type.

[damin69]

Well you came to right place for Charging issuses. There have been a few of us that have had issues with this same style motor. Now what has me a bit worried about your issue is the 16.5 volts AC at the 3 yellow from stator while idling. You should have closer to 60 Volts AC between each of the yellow wires. Refere to this www.thegsresources.com/garage/gs_statorfault.htm
Also this link here might help also.
www.scooterdoc.proboards.com/index.cgi?board=electrical&action=display&thread=168

Also if the Viva Roadster is anything like the YY250T with the radiator behind the gas tank there it is possible that you have the same fan that we have and it pulls close to 6 amps when it is running. But we can cross that path when we get to it. I would run through that Stator Fault chart first and see what you end up with.


Good luck,
Todd

[cirnobyl]

It's not the fan. I don't have the thermostat in and I have a...interesting bit of ducting work to keep it cool when going down the highway. Works pretty good, as it never overheats. Besides all of my tests are done at idle way before it comes on. As for the AC voltage, idk anymore...that chart is for a different bike then mine. The fact is with my old stator I had 14-15 volts and the new one gets me a stable 16. All the OHM resistance tests checked out OK too.

Anyway, Update. I bought a new RR and put it in. Doing some tests I noticed the wires coming from the stator, near the connector were pretty hot, especially with the old RR. With the new RR I gained .3 volts, going from (with lights off and battery charged) 13.00 to 13.3 voltage. However, revving the engine still does NOTHING. I did a lot of the tests on that flow chart, the only issue I could find was high resistance between the output wire of the RR and the battery, roughly .7 volt difference. Testing along the path I found .25 of that comes from the fuse, the rest seems to be coming from some where behind the kickboard...maybe the ignition switch? Still I don't think .7 volt difference would stop the charge from going up when I rev the engine.

Can the Magneto go bad?

Anyone have any ideas?

EDIT: Also I think I do have a CF250, just someone put the wrong clutch assembly on the back. I replaced the whole pulley/clutch assembly with a standard CF250 one and it went right on.

[cirnobyl]

Ok, let me clarify...

I get 16 volts AC on each of the three yellow wires from the stator. Those are also the wires that are getting warm/hot.

With the new RR, I get 13.3 volts DC idle with the lights and fan off. Reving does nothing.

It seems to be a cfmoto 244.

So not sure what I can do about those wires, other then cutting the plugs off and splicing the wires.

[damin69]

16 volts AC. wow If I am not mistaken you should be around 60 VAC between each one. I think your problem seems to be at the Stator.

[tvnacman]

so guys I think what we maybe missing here , Cir might be reading ac voltage from one yellow wire at a time to ground , perhaps we need to measure ac yellow to yellow . Now another thing I would like to point out is that at idle , that the RPM's will be different from engine to engine . If your battery is discharged it will suck the voltage down (starting the engine will discharge the battery ) . I would like to double check the a/c voltages at idle and reved up . I would like to know what the battery voltage is one hour after a full charge ?
John