Help, looks like we have similar problems. Went riding this past weekend
and after riding about 100 mi. came upon some construction so I shut off
Bike ('85 Max) and when I went to restart about 10 min. later it just
grunted but would not turn over. Push started bike and finished ride.
Got home and connected battery to "taper" type charger and slowly
charged battery for ~24hrs, checking specific gravity and voltage
frequently. Now battery is about 3 years old and I will replace anyway
but it did charge up to 14vdc and specific gravity was good on all but 2
cells (3 of 4 ballls floating in hydrometer on those 2 cells). Now bike
will start just fine but charging voltage is only 12 vdc whereas service
manual, (yes I have one) says that generator voltage should be 14.5
+-0.5vdc. I checked the stator winding to winding resistance and it is
definitely within spec (manual says 0.42ohm +-15% at 68 deg F), mine
indicates close to 0 on x1 scale for a small analog multimeter. I also
checked rectifier per manual and it checked ok (all manual checks here
is whether any 1 of 6 diodes are bad, not sure if it could fail another
way). Will a weak battery (terminal voltage on battery now 12vdc after a
couple of starts) cause the generator output voltage to be low? I also
checked the stator resistence to ground and it indicated 0 resistance
(complete circuit) on all 3 sets of windings but I'm not sure if that is
bad or not since the service manual does not address resistance to
ground readings (should they be 0 or infinity?). The bike is a stock
'85 Max with stock exhaust, and I have cleaned all possible suspect
connectors and also have added ground wire to rectifier. I'm sorry for
the long post but I wanted to include as much info as possible.
Thanks,
Mark Smith
'85 Max
'99 Nomad
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