1993 VFR won't charge the battery

Hi,
My 1993 VFR won't charge the battery. 17k miles on it so far.
I put in a new battery and charged it up, then changed to a new Rectifier/Regulator,
still no output from the alternator.
Battery voltage stays at about 12.6 no matter what the motor RPM is.

I ohmed out the yellow wires going into the alternator, all read between 2 and 4 ohms, which is more than the factory manual says it should be.

Put an AC volt meter on the yellow alternator outputs and it shows .8 VAC between the
yellow conductors. Does not make more voltage w/ more RPM.

I did not try measuring AC voltage between yellow and ground.

Anyway, do I need a new stator?

Thanks,
fish

 

You might go over to VFRD and look at Tightwad's posts - he's known for having many answers to these questions and has been making posts there for a long time. He may also be here - I'm not sure. He makes retrofit wiring kits for VFR's to deal with many of the VFR's charging and weak wire harness issues. He's very friendly and helpful. You can check out his website at wiremybike.com.

 

It can only be one of two things now, stator or wiring. Check both. Wiring visually, usually at the plug. Stator test method in the manual.

Larry

 

Hi,
Fixed!
The OEM stator w/ 17k miles and 17 years on it was the problem.
The insulation just flaked off, it was baked and carbonized.
One of the wires going to the coils was melted in half.
I think the stator was done in by me.
I found the battery terminal + and - bolts loose.
The poor connection probably somehow caused excessive current draw, overheating the windings.
The engine oil was also baked and burned smelling from the stator BBQ party.

 

Hi,
I want to avoid being stranded by a dead charging system again.

My old VFR has no indicators or gauges to tell me about the voltage.

So I bought a small, narrow, horizontal-scale DC volt meter and
installed it on the ledge between the windscreen and the top of the dashboard.

Allied Electronics ? Electronic Parts and Components Distributor

Allied part number 698-3108

The meter movement is not damped, so the needle jumped all over from vibration.
I installed a 15 microfarad capacitor between the + and- terminals on the back of the meter, no more jumping.

Now I can determine if I have the correct volts & amps at a glance!
Hope this idea helps someone else.
fish