If its not a sealed battery, when you fell off, the acid inside the battery could have leaked out.. there is a tube to allow this to happen on the side of your battery. If this has happened, your battery's ability to retain charge will be compromised. If a lot of acid has been lost, then the battery will have lost more of its power. You can refill such a battery using distilled water.
9.3 volts is way too low, it's flat. Either something is grounded and is draining the battery (that usually blows a fuse though) or the charge circuit isn't working. Charge the battery up, make sure it's got about 12.5v on it, put it in the bike and try to start it. If it starts and runs measure the voltage at the battery terminals, it should be about 14v esp with a couple of thousand rpms. If you're not getting at least that something's up with the charge circuit, either the rec/reg or the stator or the wiring between them all.
If the battery won't charge to +12v then it's knackered and you'll need a new one.
Good luck.
Is it a sealed battery, or one where you can top it up through plugs in the top? Also how old is the battery? Finally the battery could be ok, but your charging system is not working correctly. allowing the battery to discharge as you ride it. In that case after a few miles the battery won't have enough power to run your bike.
A quick google shows t needs filling when new, but then says its sealed once done. You see that black strip on the top of the battery, you should be able to left it off and see the level of acid inside each cell of the battery. The acid should cover the lead plates within each cell. At the moment we don't know if the problem is the battery or the charging system. A new BS battery is £35 btw.
That makes sense, but be aware that once you fit the new battery, your bike should start and run ok, but if the charging system is not working after an hour or two of riding the same problem will reoccur. It may not, but if it does, then you know the problem is with the charging system and not the battery.
How would I diagnose an issue with the charging system? What would cause the system to randomly fail after not having an issue before. Is it something that just happens, or are there gradual symptoms that worsen over time?
You can check the output from the rectifier if you have a multimeter, which can measure voltage, amps, resistance etc. You can buy one for 20 quid. Or once you've fitted a new battery, ride it for an hour or so, then check to see if its fully charged or if it takes a lot of charge when on your battery charger. If the latter, then that suggests the charging system has a problem. The alternator, which creates the electric power and the rectifier which converts that power from AC to DC before it goes to the battery, they are usually reliable. Its possible your crash somehow pulled out a connector in your wiring. something to check. Given the problem only occurred after your minor crash, then its likely that's the cause of the problem.
The display uses very little power, your lights use a lot of power, filament bulbs are very power hungry, they need a lot of current (a few amps) while your computer needs relatively little (milliamps). Your indicator and lights have relays to activate them, the relays may be trying to activate and the system is not wired to say "these are working" it is saying "the system has activated and thinks they are working". Your little display lights use so much less current than actually making the lights work.
So this is all normal with low power in your bike's system. What's weird is how your voltage is so low. So you may want to see if your battery terminals have been dislodged or if your regulator has been unplugged or something with the charging system has been affected. If you have a smart charger, some of those won't even attempt to charge a low voltage battery. The dumb chargers will charge them ok though.
You need a multimeter and after charging your battery, see if the bike is producing 14V with the engine on to make sure it is charging it during riding.
If its not a sealed battery, when you fell off, the acid inside the battery could have leaked out.. there is a tube to allow this to happen on the side of your battery. If this has happened, your battery's ability to retain charge will be compromised. If a lot of acid has been lost, then the battery will have lost more of its power. You can refill such a battery using distilled water.
I took the battery home. It's not broken in any way, but it's only reading a 9.3 voltage stand still.
9.3 volts is way too low, it's flat. Either something is grounded and is draining the battery (that usually blows a fuse though) or the charge circuit isn't working. Charge the battery up, make sure it's got about 12.5v on it, put it in the bike and try to start it. If it starts and runs measure the voltage at the battery terminals, it should be about 14v esp with a couple of thousand rpms. If you're not getting at least that something's up with the charge circuit, either the rec/reg or the stator or the wiring between them all. If the battery won't charge to +12v then it's knackered and you'll need a new one. Good luck.
Is it a sealed battery, or one where you can top it up through plugs in the top? Also how old is the battery? Finally the battery could be ok, but your charging system is not working correctly. allowing the battery to discharge as you ride it. In that case after a few miles the battery won't have enough power to run your bike.
[Photo 1](https://cdn.discordapp.com/attachments/1066827082530836490/1251987999630164059/20240616_205227.jpg?ex=6670942f&is=666f42af&hm=64de4a80566f372e0d5e4fce9fbf1565f6789454f1f7db8c1f56ce5d87703f1c&) [photo 2](https://cdn.discordapp.com/attachments/1066827082530836490/1251988000091541675/20240616_205232.jpg?ex=66709430&is=666f42b0&hm=9854c678a55425f82bf39dfaff7debdda34013fce917b80caf4562576a4214ec&)
A quick google shows t needs filling when new, but then says its sealed once done. You see that black strip on the top of the battery, you should be able to left it off and see the level of acid inside each cell of the battery. The acid should cover the lead plates within each cell. At the moment we don't know if the problem is the battery or the charging system. A new BS battery is £35 btw.
id rather buy a new battery than mess around with the leadacid. It looks tattered anyway.
That makes sense, but be aware that once you fit the new battery, your bike should start and run ok, but if the charging system is not working after an hour or two of riding the same problem will reoccur. It may not, but if it does, then you know the problem is with the charging system and not the battery.
How would I diagnose an issue with the charging system? What would cause the system to randomly fail after not having an issue before. Is it something that just happens, or are there gradual symptoms that worsen over time?
You can check the output from the rectifier if you have a multimeter, which can measure voltage, amps, resistance etc. You can buy one for 20 quid. Or once you've fitted a new battery, ride it for an hour or so, then check to see if its fully charged or if it takes a lot of charge when on your battery charger. If the latter, then that suggests the charging system has a problem. The alternator, which creates the electric power and the rectifier which converts that power from AC to DC before it goes to the battery, they are usually reliable. Its possible your crash somehow pulled out a connector in your wiring. something to check. Given the problem only occurred after your minor crash, then its likely that's the cause of the problem.
The display uses very little power, your lights use a lot of power, filament bulbs are very power hungry, they need a lot of current (a few amps) while your computer needs relatively little (milliamps). Your indicator and lights have relays to activate them, the relays may be trying to activate and the system is not wired to say "these are working" it is saying "the system has activated and thinks they are working". Your little display lights use so much less current than actually making the lights work. So this is all normal with low power in your bike's system. What's weird is how your voltage is so low. So you may want to see if your battery terminals have been dislodged or if your regulator has been unplugged or something with the charging system has been affected. If you have a smart charger, some of those won't even attempt to charge a low voltage battery. The dumb chargers will charge them ok though. You need a multimeter and after charging your battery, see if the bike is producing 14V with the engine on to make sure it is charging it during riding.
So you think it's a battery issue and not let's say a blown fuse?
#justchinesebikethings
\*german
My bad
Buy a multimeter. Check all fuses and throw a new battery in it. Once it's running bat voltage should be 13.5-14.5v. If not, inspect charging system