I have a 97 CBR 600 F3 which has been having some electrical issues lately. I am unable to start it due to it having a dead battery. I just have a couple questions I hope someone might know. How much voltage should I see being dumped into the battery and should I test the output at a certain RPM? If there is no voltage being dumped into the battery, what might be causing it besides a bad stator? Thanks for any suggestions!

- Courtney

 

could be an altinator problem also.

 

no charge going into the battery can be a shot battery, especially if the plates have shorted.. others will tell you to change the rectifier, but this is the cheapest and easiest check to do 1st before jumpin in at the deepend and making work for yourself... if you can get hold of another battery to borrow with some charge in it put it on the bike and see if you have got somewhere near 14.5V going into it at 5000rpm.. also check the acid in the battery too if it's bone dry it's f**ked,, Im sure this is your problem. If this hasn't helped i'll post the checks for the stator on rectifier for you..

 

Thank you SO much for the tips!! I know the battery is good cause I took it to a shop and it charged up and holds the charge under a load. So, I took your advice and check the output of the charging system at 5K rpm... 13.58 V. I was sloooooooowly climbing though. It is probably a sign that my alternator is on it's way out. Are you aware of any continuity tests that can be done on the rectifier?

 

unplug the voltage rectifier and you will see 3 yellow wires all going to into the plug..
1. set multi meter to A/C Volts.
2. connect Red lead (pos +) to any of the yellow terminals in the plastic plug, connect the Black (Neg -) to any oter yellow terminal in the plug.
3. Start the engine up, you should have between 40 ~ 50V A/c @ between 3000 - 5000rpm
4 continue to check all the other terminals with the Red untill you have checked all 3 yellow wires from the stator..

If you have between 40~50V A/C on all 3 wires your stator is ok and you dont need to worry. If it's any less you need to change it.