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Post by b on Feb 16, 2017 16:40:28 GMT -5
I have a Roketa MC54B 250. I tried to replace my battery. I accidentally put it in backward (connected positive to negative and negative to positive).
I reversed it and tried to start it . Now all I get is one click when I try to start it.
How do I get it going again? |
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Post by cyborg55 on Feb 16, 2017 20:14:54 GMT -5
Did you get the death smoke?
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Post by b on Feb 16, 2017 21:10:27 GMT -5
I don't remember any smoke. The fuse on the solenoid blew and I heard it. I have replaced the fuse and now when trying to start it I only get the single click.
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Post by spandi on Feb 16, 2017 22:45:00 GMT -5
You might want to run a voltage check on the battery to see if it's getting the proper charge, other than that check if the starter is OK. I had the same problem, turned out it was a grounding issue.
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Post by b on Feb 17, 2017 10:06:13 GMT -5
I measured the battery voltage and it is 13.2 volts.
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Post by b on Feb 17, 2017 10:07:07 GMT -5
How did you fix your grounding issue?
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Post by dollartwentyfive on Feb 17, 2017 13:27:52 GMT -5
voltage checks with a voltmeter will not reveal dead cells.
a battery can read full charge on a voltmeter, but yet still be bad.
reversing the polarity will not burn out your starter, or the solenoid.
there are only 2 other components (regulator and CDI), but they aren't connected to the start circuit.
do a load test on the battery or test it with a hydrometer.
if you don't know how, then take the battery to NAPA or some other parts store and ask them to do a load test on it.
clean the terminals/ connections at the battery, the solenoid, and the starter.
if none of the above helps, then test the solenoid to see if it is actually closing.
remove both of the big wires from the screw terminals, press start button, and check with an ohmmeter.
should read zero ohms.
if you have made it this far, then there is a problem with the starter wires (the 2 big wires going to the starter), or the starter itself.
there is however the possibility that the engine is locked up.
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Post by b on Feb 17, 2017 14:18:09 GMT -5
I hooked the battery directly to the starter and the starter won't turn over. Thinking the starter was bad I pulled the starter. I then connected the scooter wiring to the starter turned the key on pushed the start button and it turned over.
I am really confused. What would make my starter not turn over when in the housing but work when not inserted? How could this be related to the reversed battery? Isn't the starter clutch all mechanical? The only other thing I can think of is that reversing the connections fried my brand new battery and it doesn't have enough oomph to turn it over. My battery voltage is 13.2 volts.
Any ideas?
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Post by dollartwentyfive on Feb 17, 2017 14:46:37 GMT -5
I hooked the battery directly to the starter and the starter won't turn over. Thinking the starter was bad I pulled the starter. I then connected the scooter wiring to the starter turned the key on pushed the start button and it turned over. I am really confused. What would make my starter not turn over when in the housing but work when not inserted? How could this be related to the reversed battery? Isn't the starter clutch all mechanical? The only other thing I can think of is that reversing the connections fried my brand new battery and it doesn't have enough oomph to turn it over. My battery voltage is 13.2 volts. Any ideas? do a quick check of the engine by trying to turn the engine over with a socket and ratchet on the variator nut. remove the spark plug, and give the engine a few turns, should turn relatively easy. if the engine turns over, then the problem is with the battery, the start circuit connections, or the starter, or solenoid. go through the steps i outlined in my previous post. reversing the battery did not damage the start circuit, although it might have damaged the regulator/ CDI, (doubtful), but neither of these are in the start circuit. |
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Post by spandi on Feb 17, 2017 15:16:04 GMT -5
I hooked the battery directly to the starter and the starter won't turn over. Thinking the starter was bad I pulled the starter. I then connected the scooter wiring to the starter turned the key on pushed the start button and it turned over. I am really confused. What would make my starter not turn over when in the housing but work when not inserted? How could this be related to the reversed battery? Isn't the starter clutch all mechanical? The only other thing I can think of is that reversing the connections fried my brand new battery and it doesn't have enough oomph to turn it over. My battery voltage is 13.2 volts. Any ideas? All I can tell you is what happened to me. I ended up pulling the starter just as you did and it turned over as well. Would you believe it was caused by one lousy black wire that was not making proper contact? (At least you know the starter works) |
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Post by b on Feb 17, 2017 16:00:17 GMT -5
The engine turns over easily by hand.
The new battery is sealed. I guess for a load test I would need to take it to an auto parts store.
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Post by b on Feb 17, 2017 16:04:45 GMT -5
The starter motor turns when it isn't mounted and the start button is pressed. Doesn't that indicate that the solenoid is working?
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Post by b on Feb 17, 2017 16:15:19 GMT -5
I just checked and right now the battery is producing 12.45 volts and the starter has 12.25 volts when the start button is pressed. If there is only a 0.20 volt drop across the wiring through the solenoid and to the battery doesn't that indicate that the connections are good?
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Post by b on Feb 17, 2017 17:26:50 GMT -5
Good news. I thought about Spandi's comments about grounding the starter. I don't see a ground wire for mine. I took a jumper cable and connected the body of the starter to the negative terminal on the battery. Then I tried to start it and it turned over. My next step will be to buy a grounding cable and install it. I think that will fix it but you don't know for sure until it is done.
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Post by spandi on Feb 17, 2017 17:58:01 GMT -5
Good news. I thought about Spandi's comments about grounding the starter. I don't see a ground wire for mine. I took a jumper cable and connected the body of the starter to the negative terminal on the battery. Then I tried to start it and it turned over. My next step will be to buy a grounding cable and install it. I think that will fix it but you don't know for sure until it is done. Hmm, usually the motor is grounded by it's own metal base in contact with the bike. But at least there is now light at the end of the tunnel. I also had additional grounding issues when I installed a second battery (and battery isolator) I ended up buying a thick grounding cable, filing a bolt mount on the frame down to "clean" metal and using a slightly longer stainless steel bolt. (Let us know when you're on the road again.) |
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