rotor- electrical

[DWightSperber]

Anyone know how to test to see if a rotor is good?

[Ruffles]

I used this trouble shooting guide to diagnose mine.  

http://www.electrosport.com/technical-resources/library/diagnosis/fault-finding-guide.php

[evilcb750]

check the resistance between slip to slip ring should read 3.6 ohms to 6.0 ohms

[BullMagnum]

does the battery have to be installed to get those readings?
I tested my rotor with the battery out and only got 1 ohm.

[Marcus Binkley]

If you aren't getting from about 4.2. 5.0 ohms between the rings the rotor is bad. Perform the test with the rotor stone cold (motorcycle has not been run in about a full day)  to be sure your readings are good.  The stator yellow leads should have a resistance from yellow wire to yellow wire of around 6 ohms, give or take an ohm or so.  Resistance from each or the 3 yellow and the single black and white wires to ground should have no continuity (sp) means infinite ohms meaning no connection whatsoever.  If the rotor reads 1.0 ohms or so it's gone, replace it.  If the stator doesn't test as described, replace it.  For those of us who are already poor from replacing components on our CB750Ks it's easy to tell you to take the same route to the 'poor house',  Good luck.