1982 R65LS mystery battery/charging problem

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Sun Jun 14, 2015 9:24 am

If you require rotors check out motorworks https://www.motorworks.co.uk/vlive/Shop ... Q=ELR44642
New and s/hand parts for bmw bikes.
Thanks for the link, DD.
2015 F800GT - Oct 2018
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Honda NT700VA-8 Deauville - Feb 2015
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Honda CX500 - 1981
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Galactic Greyhound
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Re: 1982 R65LS mystery battery/charging problem

Postby Galactic Greyhound » Sun Jun 14, 2015 3:19 pm

OK - Back home!

In the following diagram, check that your B+ wire is connected to the Diode Board (likely a thick Red wire).
CAUTION: Disconnect the Battery earth terminal before removing the engine front cover to avoid shorting the Diode Board to earth.

You might also usefully measure the voltage on the Diode Board B+ TERMINAL to the Diode Board Earth point (not to a frame/engine earth). It should be around 14.5v at 2000rpm. This is because the Diode Board is usually earthed via the earthed heat sink mounting point to the front casing and back to the Main Frame Earth via the engine casing screws. If there is a poor connection between the Diode Board Earth point and the Main Frame Earth you will get little or no charging. It is sometimes advocated to run a heavy gauge wire (brown) between the Battery 12v- terminal (earth) and the Diode Board Earth point for this reason.

You should also check that the Diode Board mountings are intact and that the nuts are tight (especially on the earthed heat sink point). Some Diode Boards have solid metal mountings with insulating washers for the positive heat sink, others use rubber mounts which can fall apart. Check the mountings and how it is earthed carefully:

Click to Enlarge/Save As
Airhead Charging Circuit.jpg
Diode Board Layout.jpg
Also check that you have a wire connected to the Diode Board 'Y' terminal (Alternator earth).
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Last edited by Galactic Greyhound on Sun Jun 14, 2015 3:23 pm, edited 1 time in total.
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" - It works!

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Sun Jun 14, 2015 3:23 pm

Great stuff, GG, thanks.

I'm planning to isolate the regulator and test the diode board on Monday.

Will report back.

Cheers

NoB
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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Galactic Greyhound
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Re: 1982 R65LS mystery battery/charging problem

Postby Galactic Greyhound » Sun Jun 14, 2015 3:28 pm

Hi,

Before getting in too deep on the Diode Board, check that all the terminals have the correct wires connected to them and that the mountings have not failed so causing earthing problems.

Here is an excellent article on testing the Diode Board by one of our members; Rob Frankham,:
http://www.frankhams.freeserve.co.uk/te ... _board.htm
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" - It works!

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Sun Jun 14, 2015 3:31 pm

Ok, will do, but nothing's been touched under the front cover in years, if ever, so unlikely that wires are misconnected.

Thanks for the article link. Will check it out.

NoB
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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Galactic Greyhound
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Re: 1982 R65LS mystery battery/charging problem

Postby Galactic Greyhound » Sun Jun 14, 2015 3:49 pm

A bit more info on the Diode Board:

Click to Enlarge/Save As
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Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" - It works!

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Sun Jun 14, 2015 7:37 pm

Didn't you send me that one already, or is there something different/extra about this one?
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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Galactic Greyhound
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Re: 1982 R65LS mystery battery/charging problem

Postby Galactic Greyhound » Sun Jun 14, 2015 7:56 pm

That last one is the electrical schematic of the Diode Board with some additional notes about the mounting systems used.

It's got some wire colour info as well which may or may not be applicable to yours. :grin:
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" - It works!

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Sun Jun 14, 2015 8:13 pm

Got it.

Thanks.
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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george baker
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Re: 1982 R65LS mystery battery/charging problem

Postby george baker » Mon Jun 15, 2015 7:37 am

Hi
I am just passing a terminal with Internet connection-- Off towards Edinburgh on the way to Orkney tomorrow-- but read all of this, a great write up Ced==I am following it with interest but wondered
1 if it could be a Big diode on the board?
2 how the OP knows nothing has been done under the front cover--has he removed it?

George
Member 21, R100R, and an under used K75

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Mon Jun 15, 2015 8:09 am

Hi
I am just passing a terminal with Internet connection-- Off towards Edinburgh on the way to Orkney tomorrow-- but read all of this, a great write up Ced==I am following it with interest but wondered
1 if it could be a Big diode on the board?
2 how the OP knows nothing has been done under the front cover--has he removed it?

George
Hi George.

Yes, had front cover off to do some testing of alternator rotor and inspect brushes. I am only guessing about disturbance because everything looks original. On the other hand, brushes appear to have plenty of life left in them and yet bike has done 116k miles. Apparently brushes are good for about 80k miles, so bike could be on its second set. I know present owner rides pretty steadily, keeping revs low, so maybe......

Going to go back in and check out regulator and diode board next, hopefully today.

NoB
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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george baker
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Re: 1982 R65LS mystery battery/charging problem

Postby george baker » Mon Jun 15, 2015 8:19 am

Hi Nick
where are you based? Please put it in your profile

If you are local to me I have a spare board here in Manchester if it need to swap one out later to test but will be away until the end of the month.

George
Member 21, R100R, and an under used K75

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Mon Jun 15, 2015 8:21 am

North Norfolk, George, but thx for the offer, much appreciated.

Nick is the bike's owner, I am Peter.

Cheers
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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george baker
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Re: 1982 R65LS mystery battery/charging problem

Postby george baker » Mon Jun 15, 2015 8:23 am

Hi
BUGGER, I was there (well Central) last night

George
Member 21, R100R, and an under used K75

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Mon Jun 15, 2015 8:24 am

Hi
BUGGER, I was there (well Central) last night

George
Never mind - could've been handy, but I shall persevere!
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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Galactic Greyhound
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Re: 1982 R65LS mystery battery/charging problem

Postby Galactic Greyhound » Mon Jun 15, 2015 9:18 am

Thas a rummun - keep a troshin! :grin:
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" - It works!

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Mon Jun 15, 2015 9:36 am

Yarp, there's a fair bit of troshin in these parts!
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Mon Jun 15, 2015 6:30 pm

Well, today's tests show pretty conclusively that both the regulator *and* diode board are knackered.

With the regulator bridged out charge lamp still went out but i could get voltage at battery to rise to 14-15-16-17 volts no problem, just by opening the throttle (just for a few secs; didn't want to fry the battery!).

Took the diode board out and ran through the test sequence and none of the big diodes passed, so the board's knackered. Tried with two different meters, several times each, same every time.

So I guess the charging circuit has been up the creek for some time and it's only been a fat new battery and no long trips >100 miles that have saved my friend from being stranded! His bike developed a gearbox problem at Dover last year while waiting for the ferry for a trip around the Alps. The bike had not wanted to re-start by the time this happened, so the gearbox problem probably saved him from being stranded somewhere in the Pas de Calais with a flat battery.

Should add that he plugs the bike into an Optimate every night, that's why the battery has got a nice fat charge on it every day.

New bits all ordered - uprated regulator and diode board, plus a few other worn out bits and pieces.

Fingers crossed the new stuff does the business. Will report back when it's fitted and tested

In the meantime, and in anticipation of a successful outcome, huge thanks to Galactic Greyhound for his fantastic help and support and thanks, too, to all who chipped in, much appreciated.

NoB
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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Goldbug101
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Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Wed Jun 17, 2015 7:25 pm

All the bits arrived from Motorworks.co.uk today. Ordered uprated regulator and diode board. All fitted in without any problems.

Fired her up, boom - 14.5v right out of the box. All seems to be running sweet as a nut. Hope to go on a test run tomorrow and will take a meter to see how battery state holds up.
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

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Galactic Greyhound
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Re: 1982 R65LS mystery battery/charging problem

Postby Galactic Greyhound » Wed Jun 17, 2015 8:25 pm

That's encouraging! =D> :grin:
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" - It works!

User avatar
Goldbug101
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Posts: 373
Joined: Thu Jun 11, 2015 5:46 pm
Country of Residence: UK
Location: North Norfolk, UK

Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Wed Jun 17, 2015 8:49 pm

That's encouraging! =D> :grin:
Yes, we are very encouraged. Hopefully after we've racked up a few miles I can put the meter on the battery again and see how the charge is holding up.
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978

User avatar
Goldbug101
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Posts: 373
Joined: Thu Jun 11, 2015 5:46 pm
Country of Residence: UK
Location: North Norfolk, UK

Re: 1982 R65LS mystery battery/charging problem

Postby Goldbug101 » Thu Jun 18, 2015 5:30 pm

Counted my chickens waaaay too soon.

My friend rang me up this morning to say the engine turns over, but won't fire!

I've started a new thread as it's a different problem.
2015 F800GT - Oct 2018
2015 R1200RT LE LC - Oct 2015 & G310R - 2018
2003 R1150RT - Sept 2015
Honda NT700VA-8 Deauville - Feb 2015
Honda ST1100 Pan European - 2003
Honda CX500 - 1981
Honda CB250N Superdream - 1979
Honda CB200 - 1978


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