Battery dead or other mechanical problem?

[ashelfernando]

Hey everyone. I am a newly licensed M2 rider looking to buy my first bike. I'm looking into a CBR 125. I went to check out a bike but the battery needed to be boosted in order to start the bike. I took it for a 3 minute ride and turned the bike off and tried starting it again but it wouldn't start. I imagine the battery would charge enough to start back up again from a quick ride. After negotiation, the seller agreed to change the battery. Would a new battery solve the problem or should i walk away.

 

[RockerGuy]

Hey everyone. I am a newly licensed M2 rider looking to buy my first bike. I'm looking into a CBR 125. I went to check out a bike but the battery needed to be boosted in order to start the bike. I took it for a 3 minute ride and turned the bike off and tried starting it again but it wouldn't start. I imagine the battery would charge from my 3 minute ride. After negotiation, the seller agreed to change the battery. Would a new battery solve the problem or should i walk away.

Looks like a battery problem. But its hard to diagnose online

Sent from my tablet using my paws

 

[anark]

I'm sorry but why are you retarded?

Please tell me of all the other magical batteries that come back to a workable charge after 3 minutes?

 

[Brian P]

Three minutes is not enough to charge a battery if the battery was *completely* dead.

Check the charging system with a digital multimeter. Measure the voltage across the battery terminals. With the engine off, it should be 12.6 - 12.8 volts for a fully charged battery. With the engine running at 5000 rpm, it should be around 14.5 volts. If it is, your charging system is working and (assuming a new battery was put in) it should be all good. If the voltage is no higher with the engine running than with it off, then the charging system is NOT working, and a new battery will NOT solve the problem.