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Old 02-16-2013, 12:14 PM   #691
MikeMike
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Quote:
Originally Posted by Reaver View Post
"Do what it needs". I've seen it many times. I mean, does anyone take their GS offroad? (2%?) Why build it tough?
Truer words were never spoken.
Though you are being a little bit harsh, I will bet it is more like 8 out of 10 GS owners never take their bikes off road.
Out of the other 20%, it was likely about 75% only road to a campsite or on a connecting fire road because they had to.
Then the from the remaining 25%, about 50% wish they had something much lighter, nimble, and cheaper to fix when dropped.
The remainder are happy go lucky, good off road riders and/or masochists.
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Old 02-16-2013, 01:10 PM   #692
bross
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Oil flow

I mentioned earlier that the Honda CBF1000s (first gen) were known to fry stators. Honda's only change to the engine for the Gen 2 (2010-) models was to add a second oil passage to the alternator. So far I'm not aware of any stator failures on the Gen 2 CBFs, and I've been following the stator threads on the CBF forum. There's a few higher mileage riders with Gen 2's so it looks like Honda may have fixed their stator issues with increased oil volume.
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Old 02-16-2013, 02:25 PM   #693
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Originally Posted by vtbob View Post
Just had another thought

We've been complaining about BMW only selling the upgrade stator with an new rotor/flywheel for $900.
Has any one on this site looked closely and the new rotor/flywheel? Have that added any "fins" or other devices on in to improve air flow/circulation / cooling.

If there is maybe that is why they only sell as a pair?
I don't think there are any fins, but just ventilation .....
Here's an exploded view:

http://www.realoem.com/bmw/showparts...97&hg=12&fg=31

and here's a pretty good set of pictures: http://at.fotoalbum.eu/rubbermuh/a695272/

There is an oil outlet on the very bottom of the engine casting ...

Q1: How does oil ENTER the right side engine area?

Q2: What is the purpose of the big round "hole" at the top of the casting at about 11 o'clock here...
It just seems to be an open cavity in the side cover???
http://at.fotoalbum.eu/rubbermuh/a695272/00000004

Just looking at the flywheel, it is such a tight fit in the housing,
that I think the outside surface of the flywheel must be touching or slightly submerged in the oil at the bottom of the housing .. ...

I'm going to re-suggest a dumb idea I had about 35 pages back...
What if you drilled some holes thru the rim of the flywheel that were not quite "radially" drilled but had a slight leading angle and were countersunk on the outside surface of the flywheel ...

As the flywheel spins perhaps some oil would flow up thru the holes into the stator cavity offering some cooling as it got slung around?
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Old 02-17-2013, 08:43 AM   #694
RedHawk47
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Quote:
Originally Posted by vtbob View Post
Has any one on this site looked closely and the new rotor/flywheel? Have that added any "fins" or other devices on in to improve air flow/circulation / cooling.
On the original design the air surounding the stator was effectively trapped there - the only passage was the gap between the rotor and stator and then between the rotor and the outer case.There might have been some air movement due to hot air rising, but significent.

With the addition of the holes added to the new rotor there will now be turbulance which will cause air movement around the stator and within the entire cavity. This circulation will provide much more cooling because the heated air will be in contact with the entire casing instead of the small area next to the rotor.

This change was enough to convince me to replace the rotor as well as the stator. I expect it to be the last stator I replace thanks to the improved cooling.
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Old 02-19-2013, 12:39 PM   #695
Emmbeedee
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Our new stator from RMStator.com arrived today.

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"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.
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Old 02-19-2013, 02:40 PM   #696
ebrabaek
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Quote:
Originally Posted by Emmbeedee View Post
Our new stator from RMStator.com arrived today.

Are there not supposed to be more epoxy dipping...... ???
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Old 02-19-2013, 02:41 PM   #697
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Originally Posted by ebrabaek View Post
Are there not supposed to be more epoxy dipping...... ???
I figure we'll have better cooling this way.
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"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.
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Old 02-19-2013, 03:02 PM   #698
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Part numbers?

When you replace it with the BMW parts...is this all you ordered?

12 31 8 524 422 GENERATOR
11 11 7 704 757 FILLISTER-HEAD SCREW - 16X35
12 31 7 690 432 WASHER - A17
11 11 7 707 906 GASKET LEFT
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Old 02-19-2013, 03:50 PM   #699
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Quote:
Originally Posted by Emmbeedee View Post
I figure we'll have better cooling this way.
I'm sure cooling is better un-dipped....

The downside is that, due to the AC-current flowing thru the wiring, there may be some induced vibration which could, over time, chafe thru the insulation of the wires ...

For $100 ... it looks ok...

I have an Electrosport unit on the way, I'll post a close-up of it when it gets here
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Old 02-19-2013, 04:32 PM   #700
Emmbeedee
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Quote:
Originally Posted by JRWooden View Post
I'm sure cooling is better un-dipped....

The downside is that, due to the AC-current flowing thru the wiring, there may be some induced vibration which could, over time, chafe thru the insulation of the wires ...

For $100 ... it looks ok...
This isn't the first time I've had a stator where the windings weren't encapsulated. I can't remember having problems with the others, to tell you the truth. As you say, for $100 it looks ok.
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"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.
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Old 02-19-2013, 05:28 PM   #701
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Originally Posted by Emmbeedee View Post
This isn't the first time I've had a stator where the windings weren't encapsulated. I can't remember having problems with the others, to tell you the truth. As you say, for $100 it looks ok.
I'm certain the Electrosport stator is not encapsulated either ..........
but from the picture on their website it does seem to be different in design details!

Not sure how BMW's supplier does it, but the company I worked for at one time, did it under vacuum in order to get full "impregnation" (not motorcycle stators ... transformers) .. which is expensive..............
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Old 02-19-2013, 05:41 PM   #702
Emmbeedee
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Quote:
Originally Posted by JRWooden View Post
I'm certain the Electrosport stator is not encapsulated either ..........
but from the picture on their website it does seem to be different in design details!

Not sure how BMW's supplier does it, but the company I worked for at one time, did it under vacuum in order to get full "impregnation" (not motorcycle stators ... transformers) .. which is expensive..............
Well when we get a few extra bucks, we'll buy a spare just in case they only last a year. It's only a half hour job to change it, if necessary.

I wonder if I could put the quick disconnect, or something similar, inside the engine cover? That way I could get the changing down to 15 minutes.
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Want to know more about the Garmin Montana? See the Wisdom and FAQ Thread.
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"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.
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Old 02-19-2013, 07:04 PM   #703
JRWooden
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Quote:
Originally Posted by Emmbeedee View Post
... I wonder if I could put the quick disconnect, or something similar, inside the engine cover? That way I could get the changing down to 15 minutes.
I just wish it was smaller and lighter ... I really don't mind changing it out that much, but my "tool kit" is starting to get unmanageably large and heavy...............

As an emergency measure do you suppose we could use one of those bicycle-headlight-generators that rub on the sidewall of the tire?
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Old 02-19-2013, 07:06 PM   #704
Emmbeedee
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Quote:
Originally Posted by JRWooden View Post
As an emergency measure do you suppose we could use one of those bicycle-headlight-generators that rub on the sidewall of the tire?
As long as you catch the problem on time - it has to be moving to generate with one of those.
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"The motorcycle, being poorly designed for both flight and marine operation, sustained significant external and internal damage," police noted.
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Old 02-19-2013, 07:08 PM   #705
JRWooden
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Quote:
Originally Posted by Emmbeedee View Post
As long as you catch the problem on time - it has to be moving to generate with one of those.
Indeed ...
If I'm paying attention I "should" have that covered... but I might be having so much fun I don't notice........

This is my monitor:

http://f800riders.org/forum/showthre...mp-GPS-adapter
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