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Author Topic: replacement of the alternator rotor  (Read 1640 times)

30yearredbike

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replacement of the alternator rotor
« on: November 05, 2011, 03:44:54 PM »
I have been struggling with the replacement of the alternator rotor in my '81 R65.  Since the original died, I have tried to install 3 others, none of which have fit properly.  The problem is excessive length, not diameter.  Side by side, the original is  approximately 1 -4 millimeters shorter than the replacements.  Rick Jones has been very helpful and patient, even going so far as to install rotor #3 in his own bike with no problem.  After carefully installing that one in my bike this a.m., I am still unable to turn over the engine.  I'm stumped.
« Last Edit: November 06, 2011, 05:39:48 PM by Rob_Valdez_79_R65 »
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Offline wilcom

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Re: replacement of the alternator rotor
« Reply #1 on: November 05, 2011, 04:31:32 PM »
Quote
After carefully installing that one in my bike this a.m., I am still unable to turn over the engine.I'm stumped.  

Does that mean that there is "binding in the alternator parts keeping the motor from turning over? or does it mean there is no Battery to the starter and it won't turn over?
« Last Edit: November 06, 2011, 05:40:05 PM by Rob_Valdez_79_R65 »
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Joe Wilkerson
Telephone man with a splash of Data
Menifee, CA

Present:
1984 BMW R65LS "Herr Head"
past:
1982 BMW R65LS
1979 R65
1980 R65
1982 R80RT
1974 R90/6
1972 R75
1964 R50/2
19xx R27
ZX-11

Offline Bob_Roller

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Re: Thread Degradation
« Reply #2 on: November 05, 2011, 06:17:13 PM »
Red Bike, why don't you start a separate thread on your problem, it's kinda 'buried' here .

If you can post a few pictures, it may be helpful, you've got an uncommon issue there .
« Last Edit: November 06, 2011, 05:40:37 PM by Rob_Valdez_79_R65 »
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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Rob Valdez 79 R65

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Re: Thread Degradation
« Reply #3 on: November 06, 2011, 05:39:26 PM »
[movedhere] BMW Technical Q&A, Primarily R65 [move by] Rob Valdez 79 R65.
« Last Edit: November 06, 2011, 05:41:05 PM by Rob_Valdez_79_R65 »
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tvrla

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Re: replacement of the alternator rotor
« Reply #4 on: November 07, 2011, 10:56:06 AM »
One millimeter is about .040". Four mullimeters is about an eighth of an inch. I have a difficult time understanding where that minimal extra length could cause a problem.

Was anything else changed?
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