jer
Scoot Member
Posts: 81
Location: Wyoming-Silicon-Genessee Valleys
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Post by jer on Jan 9, 2019 1:10:06 GMT -5
Before I installed a battery in my CPI, I measured the voltage at the battery leads. The DC voltage was very low and the AC voltage was much higher. This tells me there is something wrong with the Regulator & Rectifier.
I'm wondering if there is a procedure for checking the Reg-Rec?
Thanks
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Post by harleyracer59 on Jan 9, 2019 4:50:37 GMT -5
since im guessing you have a volt meter, start scooter and see what the output of the wires at the plug are with it plugged in.
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Post by 190mech on Jan 9, 2019 5:55:37 GMT -5
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Post by 90GTVert on Jan 9, 2019 9:02:15 GMT -5
I'm not sure if you're the same person, but I've had someone emailing me with the same question and alarmed that DC charging voltage doesn't match the 50VAC that they get from the wires coming from the stator. The regulator/rectifier is there for a reason and you don't want 50 volts headed to your battery. If the battery is good and charged, hopefully you'll see roughly 14-15V charging at the battery when it's revved. If you're seeing charging output and the voltage at the battery is not in that range even revved, then check your battery. www.youtube.com/watch?v=Bw3ikMEGh74
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jer
Scoot Member
Posts: 81
Location: Wyoming-Silicon-Genessee Valleys
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Post by jer on Jan 9, 2019 9:28:49 GMT -5
since im guessing you have a volt meter, start scooter and see what the output of the wires at the plug are with it plugged in. My VOM only goes to 500 volts, and even tho it is a cheapo, I think I'll wait awhile on your suggestion. Oh, and this scooter only has one wire at the plug, like the others I've had contact with, so I wouldn't know which "wireS" you speak of in your reply. Can you elaborate on the "wires at the plug" that you mention?
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jer
Scoot Member
Posts: 81
Location: Wyoming-Silicon-Genessee Valleys
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Post by jer on Jan 9, 2019 9:39:17 GMT -5
since im guessing you have a volt meter, start scooter and see what the output of the wires at the plug are with it plugged in. Why yes, I have a volt meter. Before I installed a new battery in my CPI I measured the voltage at the battery leads. The DC voltage was very low (4.x VDC) and there was AC voltage present that was much higher (14.x VAC.) I know there is not 'sposed to be AC at the battery so that tells me that, at least, the Reg-rec is faulty.
Another reply steered me to the "Resources" section where I ran across a topic about how to check the Reg-rec, which is what I was looking for when I posted. I apologize for asking such a lame-O question.
Thanks for all your replies.
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jer
Scoot Member
Posts: 81
Location: Wyoming-Silicon-Genessee Valleys
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Post by jer on Jan 9, 2019 9:40:41 GMT -5
Oh, and I forgot to say that the scoot doesn't have a battery connected.
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jer
Scoot Member
Posts: 81
Location: Wyoming-Silicon-Genessee Valleys
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Post by jer on Jan 9, 2019 9:46:54 GMT -5
No, that isn't me. I have a firm grasp of the functions of a Regulator and Rectifier whether they are utilized as separate components or combined in the same part.
I did go to the Resources section as you suggested. I'm new at this site and will spend time in that section before posting up topics in the future.
Thanks lots.
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jer
Scoot Member
Posts: 81
Location: Wyoming-Silicon-Genessee Valleys
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Post by jer on Jan 9, 2019 9:54:09 GMT -5
OOPS! It was 190mech that I should thank for the link to the tech section. I believe in giving (and taking) credit where credit is due.
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Post by gsx600racer on Jan 9, 2019 14:06:26 GMT -5
You need to start at your stator. You need to check the voltage that comes off the white wire. Its AC. You will need to use a REAL multimeter the does true RMS. Chepo multimeters will give you a inaccurate reading.
Next you need to get your hands on a service manual to see what the allowable output ranges are(white wire). If that checks out then its probably a good guess that the R/R is bad.
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Post by harleyracer59 on Jan 9, 2019 14:43:15 GMT -5
sorry bud, didn't mean to come off like a smart ass. only lame O question is the one not asked. I was just saying to check the values at the regulator. both the charging circuit and the ac lighting circuit. if you have good values coming in, but no dc coming out, you know its the rectifier. if you have low values coming in to it, then you gotta move down and test the stator and see what its putting out. good luck with the trouble shooting. hope its the regulator and not the stator, because then you gotta pull the flywheel, and the reg/ rec is the cheaper part.
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jer
Scoot Member
Posts: 81
Location: Wyoming-Silicon-Genessee Valleys
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Post by jer on Jan 9, 2019 15:12:42 GMT -5
harleyracer59: Did you mean the R/R plug? Somehow I got the idea that you were referring to the Spark Plug. I'm still not keen about trying to measure Spark voltage.
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Post by harleyracer59 on Jan 9, 2019 20:02:52 GMT -5
I was talking about your r/r plug. id check it both ways plugged in and unplugged. unplugged youllse what the stator/ charging coils are putting out. on honda theyd be yellow and white. you could also ohms test your ground. plugged in you can probe the back of plug and see what its putting out and if the stator/ charging coil are doing anything like a drop in voltage indicating possible short in rec/ reg. honestly though. i'd personally just put a battery in it and see if the d/c battery connected, lined everything out or if everything worked correctly. electricity is weird like that the spark plug has nothing to do with this issue. aslong as its allowing the scooter to run.
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Post by ThomasTPFL on Jan 9, 2019 23:12:46 GMT -5
Since these things usually have a half wave rectifier it will read as an ac current on a voltmeter as it’s effectively swapping from zero to whatever with each turn of the flywheel.
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jer
Scoot Member
Posts: 81
Location: Wyoming-Silicon-Genessee Valleys
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Post by jer on Jan 10, 2019 10:06:52 GMT -5
I was talking about your r/r plug. Right, and that makes sense to me. I couldn't imagine why you wanted me to check spark voltage. It must be my feeble old mind that imagined you wanted me to get the shock of the month while poking up in there with my meter probe.
That bloody reg/rec must be in the leg shield because: 1) I checked everywhere else, and 2) some parts drawings show it there. I wish I could nail down a manual for my model. I was rebuilding manual fuel pumps for Mercedes-Benz's when I was in my teens because Benz's had such great factory manuals, they made it easy. These here scooters are more like detective work than auto-mechanics. Even mopeds have good documentation, but I guess that' the difference between Europe and (some of) Asia.
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