NEVER jump a motorcycle with a car, there is no telling what you fried on the bike. You are lucky the ecm is not toast along with the rectifier and other electrical componets. Replace the battery, it obviously has a dead cell and won't hold a charge.
The battery is definitely a problem. I don't think you did damage to the starter if the bike started right up & you didn't crank and crank on it and overheat the starter. Your charging system seems to be working fine, because if the battery was dead, that is mainly what was keeping the bike running after you started the bike..If you want to be certain the starter is ok...remove it from the bike and "bench test" it with 12 volts...it should spin good without any drag. Be careful if you do that and dont let it jump off the bench or out of your hand.. Your local Autozone or Oreilys could probably test it also, for free. I hope this helps & good luck with your bike.
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SOURCE: I have a 1980 Suzuki
Yes, yes, and no, and I don't know. You could have blown a fuse, but it seems it would be showing other symptoms if you did. THe age of the battery is a good indication of condition, over one year old, suspect, over 2 years old, definitely could be in need of replacement. Check the water in the battery and fill it to the level with bottled water, or rain water, no minerals, then get one of those floaty ball testers and check the electrolyte fluid weight, One dead cell, the battery is shot. Could have been not enough time to charge it back it up. A battery charger needs to run all night. So, check it out, hope this helps.
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It's the battery for sure? Not something else due to the fact that it was jumped by a car? I just don't want to get a new battery and find out that isn't whats wrong.
Thanks for the help. Looks like I'll be shopping for a battery tomorrow.
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