Most motorcycle problems are caused by the nut that connects the handlebars to the saddle.

Reg/rec testing

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Jameshambleton
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Location : Bedale, North Yorkshire

Reg/rec testing

Post by Jameshambleton on Sat 30 Apr 2016, 1:54 pm

I believe that my reg/rec has fried and I'm 80 miles from home. How can I test the reg/reg, I have a multimeter and the bike won't start because of the low voltage. 
The battery is on charge using a optimiser at the moment. 

the battery is reading  13ish volts, attempt to start and it drops to 7 and then 4. So I think the reg/reg has dumped 50v ac across my battery and fried it or at least kills a couple of cells.


Heated grips this week have been pretty weak too so this may have been a sign of something wrong.
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Jameshambleton
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Re: Reg/rec testing

Post by Jameshambleton on Sat 30 Apr 2016, 2:18 pm

I've just tested the diodes in the reg/reg and it seems ok with similar readings across all the terminals and no shorts so, the reg/rec should be fine right?
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arrison
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Re: Reg/rec testing

Post by arrison on Sat 30 Apr 2016, 3:06 pm

Depends how accurate the meter is youre testing it with. Mine seemed fine using my el cheapo maplins meter, but when I tested it with my Fluke meter from work, it was actually knackered. The haynes manual has test instructions for it. Hang on and Ill take a pic and post it

EDIT: pic of the test specs from Haynes



Last edited by arrison on Sat 30 Apr 2016, 3:13 pm; edited 1 time in total
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Jameshambleton
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Re: Reg/rec testing

Post by Jameshambleton on Sat 30 Apr 2016, 3:09 pm

Stator is shorting out I believe , am I doing the testing right?
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eternally_troubled
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Re: Reg/rec testing

Post by eternally_troubled on Sat 30 Apr 2016, 6:03 pm

Looks like you are doing the stator resistance test correctly i.e. three connections, A, B and C. Measure resistance A-B, B-C and A-C. It shouldn't matter which way round you do it (i.e. A-B is equivalent to B-A).

Sadly *it looks like* two of your stator coils are open a circuit or you've got a wiring fault... they should all be a similar low resistance (say less than an ohm, ish).  While you are there you should test the resistance between each of the three contacts and ground - it should be open circuit (infinite resistance).

Plus, you should change the battery on your meter - having a knackered battery will effect the resistance readings (not much, but...).
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Jameshambleton
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Re: Reg/rec testing

Post by Jameshambleton on Sat 30 Apr 2016, 10:13 pm

Got home, I don't use my heated grips and just my low beam,keep my revs about 6K (70mph) my battery charges up so I'm fairly happy for now.

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