Another alternator hits the dust and not under warranty

[BMW_BIKER_KEITH]

There was no real definitive anwser other than the Stator wiring is suspect. The author noted that a call to BMW for parts yielded a cost of over $900 large as it was a complete charging system... but all that is needed is a Stator.

The good news is that he found a Stator only at Ricks Motorsports Electrics for $165 !!!

http://www.ricksmotorsportelectrics.com/

Hope this helps!

[motoman59]

That part from Ricks is available from Parts Unlimited too. Same price. Read the article and agree, nothing not discussed here.

Not sure where the $900 comes from. There may be some parts you need besides the two mentioned. Both the gasket for the cover and the generator comes to just under $800. The warranty from BMW is 2 years. Not sure about the Ricks warranty. Probably at least 1 year. I would bet that the stator will be available soon from BMW as a single part.

Part Number Description lb Qty Each Total 11147670688 GASKET RIGHT 0.01 12317690427 GENERATOR 10.24 Total Weight:lbs ub Total: Additional Shipping Charges:

11147670688 Gasket $15.00
12317690427 Generator $778.66

Total $793.66

[JRWooden]

Originally Posted by motoman59

... Not sure where the $900 comes from.

I'm pretty sure that included in the $900 price you get a new flywheel that you don't need

Somewhere recently it was rumored that BMW would start selling the stator separately in the near future....

[LukasM]

Originally Posted by JRWooden

I'm pretty sure that included in the $900 price you get a new flywheel that you don't need

Somewhere recently it was rumored that BMW would start selling the stator separately in the near future....

Yeah in post #67 of this thread...

[TheCowboy]

I am not an engineer, just a dumb shade tree mechanic who looks at stuff without counting the binary numbers. When I pulled my dead stator at 50,000 miles all the windings were black and it smelled like fried electrics. I had it re-wound... and that didn't work (bad winding job or somthing). Bought Ricks stator and am using it now. Look at the placement of the exhaust tubes.... too damn close to the alternator for my taste. You know that exhaust tube gets MIGHTY damn hot.... tell me it does not effect the alternator. I suggested heat wrap on the exhaust around the alternator area - but have been too busy to try it.... it might be a simple fix.

TheCowboy

[BMW_BIKER_KEITH]

Damn good idea Cowboy... damn good observation.

[JRWooden]

It sure as hell can't hurt ....
I was in O'Reilly auto parts the other day and they had the stuff hanging on the shelf ...
I think I'll go back and get some...

It looks like it will require removing the headers to do the wrapping....
We'll need a pair of new gaskets P/N: 18217672804 to go between the pipes and the cylinder head?

[Gangplank]

If I was going to go that far I'd get mine jet-hot coated.
http://www.jet-hot.com/coatings/

Reduces heat, looks good & comes in various colors. Looks better than a wrapping.

[flying.moto]

Jet hot sounds like a good idea. I had been wrapping my header pipe on the dirtbike and it's been great! No burned leg/pants when i get pinned to it. BUT it clogs up with mud too easy and the mud soaks right through, not to mention moisture/water. Some said it will breed corrosion. At the end of it all i took it off and learned to ride better. It may be a solution for those who don't venture in a lot of mud/water... But then, caked on mud... Bad idea or just bad looks+weight?

[motoman59]

What about a simple exhaust pipe heat shield of SS on the upper (closer) pipe to deflect the heat away from the cover. Won't absorb water like the wraps. Besides, there is not enough room to wrap only the upper pipe. You would have to wrap both. The distance between the pipes is not large enough to get the wrap between.

A Ti cover would look good but CF would disipate heat better.

[ebrabaek]

Originally Posted by motoman59

What about a simple exhaust pipe heat shield of SS on the upper (closer) pipe to deflect the heat away from the cover. Won't absorb water like the wraps. Besides, there is not enough room to wrap only the upper pipe. You would have to wrap both. The distance between the pipes is not large enough to get the wrap between.

A Ti cover would look good but CF would disipate heat better.

Carbon fiber would be a great isolator..... But we would need some input from the know how's...... That this would in fact work..... Before making a shield.......

Erling

[FredRydr]

Originally Posted by Gangplank

If I was going to go that far I'd get mine jet-hot coated. Reduces heat...

But how can a thin coating reduce heat radiance? I'm no engineer.

Fred

[JRWooden]

I wonder if a layer or two of this stuck to the bottom part of the stator side cover would be worthwhile:

http://www.thermotec.com/products/14...mo-shield.html

Note that this particular product is NOT meant for wrapping exhaust pipes!
But this company does sell that stuff as well....

[Gangplank]

Originally Posted by FredRydr

But how can a thin coating reduce heat radiance? I'm no engineer.

Fred

Here ya go - article about plasma sprayed ceramic coatings: http://www.gizmag.com/spray-on-ceram...eratures/6642/

"One motorcycle racing team that employed the system used a laser-guided thermometer and found that while the exhaust can have an internal temperature of around 150 degrees Centigrade, the outside temperate can be low enough for the exhaust pipe to be removed WITHOUT using gloves."

"Lower temperatures also increase the durability and effectiveness of engine and transmission oils, improve engine cooling and help to protect ancillaries such as starters, regulators, wiring and modern alarm and ignition systems from the degrading affects of excessive heat."

Starting to think about doing this.

[Hucker]

Originally Posted by Gangplank

Starting to think about doing this.

Me too...