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Cbf1000 charging problems

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Beans
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Cbf1000 charging problems

Post by Beans » Sun Jan 12, 2020 8:08 pm

The cbf1000 isn't charging. Again.
I've been looking at the reg rec and stator with a multimeter. First thing I thought was stator as the biffer is notorious for it.

Test 1
Charged battery overnight. Measured voltage at battery. Started bike, rode around for 20 minutes at high revs. Measured voltage at battery again, below 12v.

Test 2 ALTERNATOR CHARGING COIL INSPECTION
• It is not necessary to remove the stator coil to make this test.
Remove the following:
– Left side cover (page 3-4)
– Left rear cowl (page 3-8)
Remove the wire band and disconnect the alternator 3P (White) connector.
Check the resistance between three Yellow terminals of the alternator side connector.
STANDARD: 0.1 – 1.0 Ω (at 20°C/68°F)
Check for continuity between each terminal and ground.
There should be no continuity.
If resistance is out of specification, or if any wire has continuity to ground, replace the alternator stator.


This test passed all values were consistent.

Test 3 Regulator rectifier harness
Green wire: Grounds the system to the frame (may have two wires). Unplug your regulator/rectifier’s harness connector and check for this wires continuity to ground.

• Set your meter to Ohms/resistance (Ω).

• Place one lead on the wire and the other lead to a solid ground.

*Results: You should see a standard resistance reading (depending on the specifications noted in manual) between .001 Ω up to .9 Ω. Typically a standard circuit wire has at least .01 Ω of resistance. If you discover that you have and open (no numeric value) or a excessively high reading. Check the harness for breaks, rusty corroded frame ground, or loose connections (battery terminals included)


Display of multimeter goes off. Suggests that this reading isn't right.
Now what
?
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Re: Cbf1000 charging problems

Post by Stu » Sun Jan 12, 2020 8:38 pm

Check the lettering on the tank!!!

This normally finds that its a honda and the reg/rec is probably fried as usual :lol: :lol: :lol:

Seriously

Forget resistance tests first of all as they can show a good reg/rec when its dead once warmed up!

Check the output from the generator/alternator/stator whatever you want to call it

Then plug it in to the reg/rec and check the output at the wiring closest to the reg/rec

If this fails to give the answer then dig deeper in to resistance/continuity checks
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Re: Cbf1000 charging problems

Post by Beans » Sun Jan 12, 2020 8:45 pm

I wish I had not bought it
Stu wrote:
Sun Jan 12, 2020 8:38 pm
Check the output from the generator/alternator/stator whatever you want to call it
How? Engine running, stick multimeter in alternator harness and rev it?
Then plug it in to the reg/rec and check the output at the wiring closest to the reg/rec
How?
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Re: Cbf1000 charging problems

Post by MrPickwick » Sun Jan 12, 2020 8:53 pm

Rec Reg.JPG
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Re: Cbf1000 charging problems

Post by Beans » Sun Jan 12, 2020 8:55 pm

MrPickwick wrote:
Sun Jan 12, 2020 8:53 pm
Rec Reg.JPG
That seems fine so the problem appears to be either the stator (but the continuity tests on stator passed) or the harness side of the reg rec wiring
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Re: Cbf1000 charging problems

Post by Stu » Sun Jan 12, 2020 9:02 pm

Beans wrote:
Sun Jan 12, 2020 8:45 pm
I wish I had not bought it
Stu wrote:
Sun Jan 12, 2020 8:38 pm
Check the output from the generator/alternator/stator whatever you want to call it
How? Engine running, stick multimeter in alternator harness and rev it?
Step 1. Set the multimeter to AC volts.

Step 2. With the ignition off, measure between the coils/phases by connecting the multimeter's leads to the three terminals in the stator's electrical connector. Measure between phases 1 and 2; between 2 and 3; and between 1 and 3. There should be no reading between the terminals.

Step 3. With the ignition on and the engine running, measure between the coils/phases by connecting the multimeter's leads to the three terminals in the stator's electrical connector. Measure between phases 1 and 2; between 2 and 3; and between 1 and 3. There should be a positive reading between the terminals.

Step 4. With the ignition on and increasing the engine's RPM, measure between the coils/phases by connecting the multimeter's leads to the three terminals in the stator's electrical connector. Measure between phases 1 and 2; between 2 and 3; and between 1 and 3. The reading between the terminals should increase as the RPM increases.

If the voltage readings don't change from when the ignition was off to when the engine was running, the stator is faulty and will need to be replaced. Watch the video above to see the full process of how to do a dynamic stator test.
Beans wrote:
Sun Jan 12, 2020 8:45 pm
Then plug it in to the reg/rec and check the output at the wiring closest to the reg/rec
How?
there should be a connector where you can stick the multimeter in to attached to the reg/rec
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Re: Cbf1000 charging problems

Post by MrPickwick » Sun Jan 12, 2020 9:02 pm

This check if you like is generic ,Use the readings from your manual, and take the Voltage AC , as in the second half of this PDF
stator_check.pdf
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Re: Cbf1000 charging problems

Post by fastbob » Sun Jan 12, 2020 9:12 pm

Stu wrote:
Sun Jan 12, 2020 8:38 pm
Check the lettering on the tank!!!

This normally finds that its a honda and the reg/rec is probably fried as usual :lol: :lol: :lol:

Seriously

Forget resistance tests first of all as they can show a good reg/rec when its dead once warmed up!

Check the output from the generator/alternator/stator whatever you want to call it

Then plug it in to the reg/rec and check the output at the wiring closest to the reg/rec

If this fails to give the answer then dig deeper in to resistance/continuity checks
When I was in the bike parts trade I remember that pattern Rec Regs ( Electrex ) for Honda's outsold those for other makes by a considerable margin especially those for CBR 's

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Re: Cbf1000 charging problems

Post by Beans » Sun Jan 12, 2020 9:17 pm

We'll pick this up tomorrow if that's ok as I had best not be revving up now but thanks for the guidance so far
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Re: Cbf1000 charging problems

Post by oldgrump » Mon Jan 13, 2020 9:52 am

fastbob wrote:
Sun Jan 12, 2020 9:12 pm
Stu wrote:
Sun Jan 12, 2020 8:38 pm
Check the lettering on the tank!!!

This normally finds that its a honda and the reg/rec is probably fried as usual :lol: :lol: :lol:

Seriously

Forget resistance tests first of all as they can show a good reg/rec when its dead once warmed up!

Check the output from the generator/alternator/stator whatever you want to call it

Then plug it in to the reg/rec and check the output at the wiring closest to the reg/rec

If this fails to give the answer then dig deeper in to resistance/continuity checks
When I was in the bike parts trade I remember that pattern Rec Regs ( Electrex ) for Honda's outsold those for other makes by a considerable margin especially those for CBR 's
Hi @Beans as @Stu already said if its a Honda then probably the rec/reg, in fact my Vfr's stopped working this weekend, but I must admit it's done over 60000 miles, and only the second one on bike at 95300 miles!
But as @fastbob said use the [Electrex] one, which has lasted 60000 miles and will be ordering new one today from them.
Bit more expensive than cheap Chinese rubbish but last a lot longer, have brought stators also from them for Vfr400 nc30's and other stuff.
No faults with what they sell. Also check out there information about rec/reg and batteries!!
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Re: Cbf1000 charging problems

Post by Beans » Mon Jan 13, 2020 8:16 pm

Stu wrote:Then plug it in to the reg/rec and check the output at the wiring closest to the reg/rec
Beans wrote: How?
there should be a connector where you can stick the multimeter in to attached to the reg/rec
I don't understand this one @Stu if the reg rec is disconnected, the only thing I can test is continuity. There's no voltage going to it -it's disconnected
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Re: Cbf1000 charging problems

Post by Stu » Mon Jan 13, 2020 8:23 pm

Beans wrote:
Mon Jan 13, 2020 8:16 pm
Stu wrote:Then plug it in to the reg/rec and check the output at the wiring closest to the reg/rec
Beans wrote: How?
there should be a connector where you can stick the multimeter in to attached to the reg/rec
I don't understand this one @Stu if the reg rec is disconnected, the only thing I can test is continuity. There's no voltage going to it -it's disconnected
Is there only one plug on the reg/rec? some have one some have two

with it all connected up and the bike running you should be able to get the probe from multimeter in to the output side of the reg/rec to see what its putting out

Doing this eliminates all the wiring from the reg/rec to the battery
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