- make sure your battery has a full charge...how did you rewire your bike...what changes have you made
- its a long time since ive had to do anything with original charging systems as i run an rd permag...this is just off the top of my head so it would pay to double check the desired specs in your manual
- first check the brushes-should be min 9mm or 3/8"
- with key/kill on check voltage at the hot brush...if none then check that the + from batt to reg is live...if live and no voltage at brush then reg is '*'&$§ed...
- check rotor with key/kill on (power to the rotor)-should pull a .003 feeler gauge into it when held by the rotor nut
- from the alternator comes a 6 pin connecter with 3 white wires, there is also a single connecter with a yellow wire
-using lowest resistance scale on a multimeter check each pair of white to white-3 pairs(1-2,2-3,1-3)-depending on the year they should read around 0.5 or 1.0 ohms
-measure yellow to any white...0.7 ohms
-measure from white to engine casing...infinite
-remove both brushes...measure resistance from slipring to slipring...5.0 ohms
-measure resistance slipring to rotor body at high resistance scale...infinite
- check the rectifier-it changes ac to dc-with a multimeter ground one lead and touch the other to each pin...reverse the leads-if the measurements are the same you need a new rec...these have 1 way diodes in them so should only pass a current 1 way-by reversing the leads you are checking both directions