i've checked two rectifiers and they appear ok .ie diodes appear to be allowing one way current only
both the red and black wire have continuity on the rectifier.
The two red wires on the bike loom going to the rectifier go to the main 40 amp fuse
the two black next to them are earth.
disconnected from the rectifier, the alterator produces about 28 /30ish AC current rising to 50 odd ac if blippping throttle.
Switched off engine ,keeping the rectifier earthed , disconnected all wires apart from those from the alternator and then restart taking an AC reading and it now reads only about 3v AC , at the connector block (3 yellow) from the alternator to rectifier.
Switch engine off , disconnect alternator lead to rectifier. Restart and alternator giving out proper AC voltage .
Engine off , 3 contacts on alternator plug check out ok with ohm meter and no shorts to ground.
I'm wondering if the stator can pump out AC power but then when a load is applied (connecting to rectifier 3 yellow wires ) fail under load
update
tested three different rectifiers and all appear to be within values . I.E DIODES one way current only , values on meter all similar.
Tested spare alternator off the bike and get same ohm readings as the one on the bike
Bike battery with ignition off reads about 12.6v across terminals dropping to 11.9/12v when ignition switched on and lights drawing load but bike not running.
earth ground for rectifier checks out ok
So i'm stuck ? every time i connect a rectifier, the alternator connector to the rectifier drops from 28v at idle to 3v all AC CURRENT.
What kind soul
would like to set their multimeter to ac and give me the readings of the bike at idle , at the connector of 3 yellow wires going to the rectifier