Motorcycle Repair: 1994 Honda Shadow 1100 vt, honda shadow 1100, regulator rectifier


Question
After being on holiday and my bike breaking down, the Honda shop found
that my stator and rectifier were bad causing it to kill my battery ultimately.
The honda shop replaced the stator, rectifier, battery, and re-checked
voltage/amp outputs which were deemed to be fine. Three weeks later and
1000 miles put on the bike, my bike would not start one morning. Upon
checking and removing the battery there was absolutely no water left in the
battery. ( I made sure it was full of water/acid and charged at the shop) HELP!!
what do you think is causing my charging system woes?

Answer
Morgan,

you have a serious overcharging problem there.
I suspect the problem is either a faulty new
regulator or the engine ground wires need
to be cleaned and/or re-attached to a better
place on the engine. The regulator/rectifier
needs a solid ground to operate.
Get a multimeter, check the battery voltage
with the engine revved up, it should
not go over 14 to 14.8 volts at the most.
(Thats around 22 amps and 329 watt output.)
If it goes over this, start cleaning the
rectifier connectors and grounds on the engine.
Make sure battery is good and cables tight.
Check the main fuse for a clean connection.
There are 3 yellow wires coming up from
the stator, make sure the connector is
good and clean.
If grounding doesn't help, I would
suspect the new rectifier may be faulty
or it's wiring damaged.