battery not holding a charge
 

I got a 93 cbr 600 f2, the battery is not holding a charge, and the headlights is always in high beam. was wondering if the headlights draining the battery or could it be something else. I already changed the rectifier and the bike is still not charging the battery. wanted to know if this is a easy fix

How old is your battery?

This is from memory, so bear with me and correct me if I'm wrong...

With the bike off, unhook the negative battery cable. Take an multimeter (set to amps) and connect one end to the negative battery terminal and the other end to the negative battery cable. If the reading isn't really close to 0, you have a draw somewhere. Next would be the fun part of testing all the wiring/components for a short. :D

Best way to test for a short would be to continuing doing the test above, but pulling fuses until the amperage goes down. Then you've found your trouble component.

i got a new battery on it, when i first put it on it ran fine but now its not charging

what made you change the rectifier? Was it bad? or was it just a guess that it may be bad?

My next step would be to test the stator. unlpug it from the rectifier and test across all three leads. 1and2,2and3, and 1and3. they should all be close th the same resistance in ohms, probably around .6 or .7. If one is out compared to the others, then your stator is bad. You can .1 and sometimes even .2 out and the stator will still work, but they should all be within .1 across all three. any more than that, its bad.

Another posibility is your rectifier was bad, you changed it, but kept the same battery. If your rectifier went bad, chances are pretty good it ruined your battery. If your new battery was being charged by the bad recifier, it was recieving the wrong voltage and potentially is now bad. the rectifiers job is to turn AC power into usable DC power. When that doesnt happen, its very hard on a battery and wont take long at all to fry it.

Same thing happened to my bike. Its in the shop right now as I write you. Have the bikes Alternator (stator) checked. If thats it it will cost you around 400 bills to replace. and get yourself some new headlights cause if the wrong ones are in there then you can be stuck with just high beams. And yes the lights can drain the battery and keep it from holding a charge esspecially if you have those after marked blue ones...