Clinician
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Joined: Dec 31, 2012 10:39:35 GMT -6
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Post by kenneth36laughlin on Jan 5, 2013 10:25:03 GMT -6
Hey, I finally found a place to answer. Fri morning I removed all forward shrouding to get to voltage reg and rectifier. checked all plugs, then started scooter in the dark to check for a possible arcing. This was negative so started the testing of each of the magneto wires. I tested them by removing bayonet part from plug, so remaining two leads would still be connected. These results were 21 to 24v idle, and 40-42v at 4K. Measuring between two of the yellow leads while running gave 30-40v ac. I had checked the diode with an ohm-meter before, shows open one way. short the other. Voltage running at the diode- Idle 12v line side, 13.7 battery side, and at 5K 11v line side and 14.7v bat side. Needless to say, the voltage across bat terminals now was 14.2v. Good news and bad news. Battery is charging fine now, but I haven't a clue why. With the voltage meter still attached and motor running, I tried everything I could to find bad connection. It is all back together now and is going down to a lot with a FOR SALE sign. Thank you for the suggestions, and help.
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Clinician
Currently Offline
Posts: 4
Likes: 0
Joined: Dec 31, 2012 10:39:35 GMT -6
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Post by kenneth36laughlin on Jan 3, 2013 15:26:13 GMT -6
Finally got the wife to hold throttle at 4K. Readings are 50v ac between each of the three yellows, plus or minus 1or 2 volts. Continuity of each lead to ground is neg. This would indicate to me that maybe I should pull all the shrouding so I can get to all electrical plugs and check the voltage at the battery while checking all the plugs, maybe a bad connection, which I did find earlier on the red wire from the "monostat", which I assume is the regulator and/or rectifier. the diode at the red line at the battery pos terminal checks OK.
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Clinician
Currently Offline
Posts: 4
Likes: 0
Joined: Dec 31, 2012 10:39:35 GMT -6
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Post by kenneth36laughlin on Dec 31, 2012 14:24:52 GMT -6
I'm a new member with a Roketa 79-250 with a charging problem. Checking the three yellow wires in series like this: I get 40v -40v- 36v. I get 12.2v, plus or minus .5v, across the black and red battery wires disconnected from the battery with motor running. It is apparently is enough to keep the motor running, but the bat slowly runs down. I strongly suspect the magneto. Appreciate your opinion. thank you. |
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