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post #1 of 27 Old 07-19-2018, 02:20 PM Thread Starter
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Jump starting

Portable tire pumps like the Slime 40001 Motorcycle Tire Inflator come with multiple connection options, one being a cord with a pig-tail and alligator clips to connect to the battery.

Question: If you had two motorcycles and one's battery was dead, could you use this pig-tail connector to jump start the bike?
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post #2 of 27 Old 07-19-2018, 03:04 PM
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Not ideal, because typically you want the vehicle getting a jump to only get the positive lead and the negative should go to ground. BUT.. loads of people do it wrong and connect + to + and - to -... after some sparks, the jump does work. So.. while I wouldn't use that approach, I am guessing that yes, it can be done.
Has anyone tried?
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post #3 of 27 Old 07-19-2018, 03:47 PM
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Can you jump start with only 15 amps or so? These SAE battery connectors are not very heavy. kfh000
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post #4 of 27 Old 07-20-2018, 10:11 AM
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I would say no. The wires are too small. Just look at the wire from the battery to the starter solenoid and that is only running 1 foot.
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post #5 of 27 Old 07-20-2018, 10:19 AM
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I wouldn't jump with less than 6ga wire, 4 ga preferable, there's a lot of amps, even a 6ga wire will get hot if it has to crank more than 2 seconds

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post #6 of 27 Old 07-20-2018, 10:21 AM
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No longer can one wire the positives together, then touch bumpers to achieve circuit.
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post #7 of 27 Old 07-20-2018, 11:06 AM Thread Starter
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Thanks for everyone's input!
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post #8 of 27 Old 07-20-2018, 04:27 PM
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Quote:
Originally Posted by Lrobby99 View Post
No longer can one wire the positives together, then touch bumpers to achieve circuit.
Bumpers made of plastic now. I was kind of hoping a motorcycle starter would not take quite the amps that even small cars take.

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post #9 of 27 Old 07-20-2018, 04:40 PM
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yeah likely melt the small gauge wires.

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post #10 of 27 Old 07-20-2018, 04:48 PM
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Aren't starters on bikes drawing anywhere from 50-100 amps when they're turning the engine over? That's a lot of amperage running through an 18 or 22 gauge wire that's several feet long (which is what a lot of those wires are in things like a small air compressor). I checked my amp rating chart, and a 12 volt, 50 amp load on a wire that's 7 feet long requires 12 gauge wire. Seven feet of wire at 100 amps and 12 volts would require 10 gauge.
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Last edited by RCinNC; 07-20-2018 at 04:58 PM.
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