larrydr Posted March 13, 2021 Share #1 Posted March 13, 2021 I did install the upgraded stator ..Altenator ...and new battery I did notice that at about 2000 rpm charging voltage was at 13 volts . I found that current draw on the battery from the rad cooling fans was drawing more power than charging system was putting back into the battery . There no fuses that blew which makes think that charging system is failing . I will re-test the rectifier / regulator ... Am I missing something ?? Link to comment Share on other sites More sharing options...
Marcarl Posted March 13, 2021 Share #2 Posted March 13, 2021 1 hour ago, larrydr said: I did install the upgraded stator ..Altenator ...and new battery I did notice that at about 2000 rpm charging voltage was at 13 volts . 13v is not enough I found that current draw on the battery from the rad cooling fans was drawing more power than charging system was putting back into the battery .That is normal, but it depends on how much. There no fuses that blew which makes think that charging system is failing . I will re-test the rectifier / regulator ... Yep, that might be the issue. Check the connections by taking them apart. Am I missing something ?? Link to comment Share on other sites More sharing options...
cowpuc Posted March 13, 2021 Share #3 Posted March 13, 2021 At 2 grand you might still be below the R's needed to trigger the regulator. Put your meter back on it or watch the dash meter and rev the R's a little higher and see if the Volts pop up higher. Did you test the Alternator windings with an ohm meter before you pulled it out? Link to comment Share on other sites More sharing options...
larrydr Posted March 14, 2021 Author Share #4 Posted March 14, 2021 (edited) Thanks cowpuc & Marcarl ...The old windings were shorted to ground .. The guy I bought the 83 from said he had the same problem . He took it on 6500 mile trip and often ended up with a dead battery , he carried a spare battery with him . I would like to replace the rectifier ..regulator , the only problem is finding a exact replacement ...any rpm above does not change it to above 13 volts Any order from Yamaha takes 90 days to get here , I may try a alternate from another bike .. I Will have to check the AC volts coming from the stator I have several in stock from other Yamaha models . Edited March 14, 2021 by larrydr Link to comment Share on other sites More sharing options...
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