Honda cbr 600fw not charging or is running off battery as bike died when riding at night with lights on

With a voltmeter check to see if terminals show several volts higher than battery specs when bike is running. If so then replace battery. If not have charging system checked out.

You could load test the battery ,to see if its good ,if it is good or new,it may be your stator,or charging system.You could check the voltage of the battery while its running to see if its charging. I found ,they dont like not being started,or sitting for awhile. Ive installed a battery tender ,that keeps my battery fully charged even if you let the bike sit for extended periods of time. Its a very low amp charging system ,then turns itself on and off,to keep your battery fully charged. Sometimes there called Float chargers too.

Perhaps it will run for a few seconds or minutes but it will die eventually. Stock bikes cannot run just with their battery. You need to have your stator repaired.

It sounds like a problem with the charging circuit. You should be able to ride with your lights on!
The first thing to do is put a multimeter set to DC Volts across the battery with the engine running. Are you seeing more than 13.5 volts? If not there is a charging problem. It could be the regulator/rectifier or the stator windings, or just loose electrical connections if you are very lucky. I have a manual for the 900 Fireblade (I used to have a 98 Blade) so let me know if you need anymore help.

i think i had the same problem there, it does`nt charge the battary unless ur doing over 5 revs

Hope this helps

Cheers
Martin

how old is the battery in the bike? i just worked on a bike recently that wouldn't run right until i installed a new battery. have you ever changed out the plugs? also, make sure your air filter element is clean.

batteries do lose charge if connected and not running for a while. when in storage you should disconnect the battery. specially if the storage area isn't heated.


hope this helps.

FI means fuel injection and your bikes computer is picking up a problem and letting you know that maintenance has to be performed for peak efficiency. you can go to the dealer and have them read the codes and you can decide whose going to do the repairs. or just try some Seafoam, buy it at Autozone pour 1/3 to 2 gallons fuel, it wont hurt it, and ride it around getting on every once in awhile, for about 10 to 15 miles, then you might have to disconnect the battery to reset the light...these are just the cheapest things to try. let me get some feedback on this thanks!

To clarify.... Have you had it on a trickle charge? Do you ride it all the time? Alarm? Sounds to me (with out being there) like a common problem....But I would need to hear it. Does it run sluggish just before it stalls or dies? If yes to most or all of those it may be that your battery isnt hold a charge. You have to run your bike at high RPM for it to properly charge. Just starting it in the garage from time to time dosnt really charge the battery. Take it to autozone and get a good charge on it if you havnt already. It take 3 hours to charge that battery fully. Also another 2 things strike me as well. 1.It could be the tilt sensor isnt operating properly. 2. The kick stand sensor or kick stand loose. I would try those first. Let me know.

Almost certainly a bad battery. Put a voltmeter on the battery and check it while trying to start the bike. If it drops to less than 10v the battery is dead.