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View Full Version : k75 (1995) - Alternator spec.s ??

walterdaniel
11-10-2005, 10:14 PM
:banghead
I would like to find the specifications on my k75 (1995) alternator. i.e. volt output, watts. and amp potential.
Belg
11-10-2005, 10:50 PM
:banghead
I would like to find the specifications on my k75 (1995) alternator. i.e. volt output, watts. and amp potential.

This might help:

http://www.ascycles.com/history_k75_s_data.aspx

Alternator 12 V 460 W

Not sure what the formulae is for amps, but... that's out there too...
kbasa
11-11-2005, 12:36 AM
I moved this over to Kbikes.
kioolt
11-11-2005, 04:26 AM
I'm 99.9% sure that the atlernator on a 95 K75 would be 700 watt, 50 amp, 14 volt.
bmwmick
11-11-2005, 07:54 AM
I'm 99.9% sure that the atlernator on a 95 K75 would be 700 watt, 50 amp, 14 volt.

Correct, 14V 50Amps for all K75's after 07/1993. The K1100's went to the 50A alternator after 09/1992.
cjack
11-11-2005, 08:03 AM
This might help:

http://www.ascycles.com/history_k75_s_data.aspx

Alternator 12 V 460 W

Not sure what the formulae is for amps, but... that's out there too...

I think BMW uses 14 volts...or maybe 13.6 volts when calculating the amps or power. That is...divide 460 by 14 to get the amps.
Belg
11-11-2005, 08:20 AM
I think BMW uses 14 volts...or maybe 13.6 volts when calculating the amps or power. That is...divide 460 by 14 to get the amps.

Hmmm... be interesting to find out if my bike has a 460 or a 700. It's a 90 or a 91 (I forget offhand, no coffee yet...) but it was bought in 94 after a rebuild (previous owner laid it down, had A&S fix and sell). Probably a 460, I can't imagine the alternator needed replacement, but... I never thought there was possibly higher.

Any way to test that?

Belg
bmwmick
11-11-2005, 08:37 AM
Hmmm... be interesting to find out if my bike has a 460 or a 700. It's a 90 or a 91 (I forget offhand, no coffee yet...) but it was bought in 94 after a rebuild (previous owner laid it down, had A&S fix and sell). Probably a 460, I can't imagine the alternator needed replacement, but... I never thought there was possibly higher.

Any way to test that?

Belg

Belg,
Plug in the last 7 digits of your VIN here: http://www.realoem.com/bmw/select.do
and you will see your bike's birthdate. As for what they rebuilt yours with, you can remove the little cover over the alternator and read the label with a dental mirror. :) One telltale is the way the large red wire connects to the alternator. If it's a ring terminal, it's a 50A. The 32A used a spade connector.
Belg
11-11-2005, 08:41 AM
Belg,
Plug in the last 7 digits of your VIN here: http://www.realoem.com/bmw/select.do
and you will see your bike's birthdate. As for what they rebuilt yours with, you can remove the little cover over the alternator and read the label with a dental mirror. :) One telltale is the way the large red wire connects to the alternator. If it's a ring terminal, it's a 50A. The 32A used a spade connector.

Nice, Thanks. Bookmarked. It's a 1990, made if I read this right, in September of 89... which would make this bike's birthday right around my 19th...

You Have Selected: M K59 ohne K75S USA 19890900
Production Code: 0572, batch ID: 47908

ANy way of pinning that down (or should
I just be happy and celebrate for the both of us?)
bmwmick
11-11-2005, 08:52 AM
You Have Selected: M K59 ohne K75S USA 19890900
Production Code: 0572, batch ID: 47908

ANy way of pinning that down (or should
I just be happy and celebrate for the both of us?)

I don't know how to get it any closer, 09/1989 is your official build date.
:brow Just a kid huh? :)
Belg
11-11-2005, 05:29 PM
Depends on whether I'm at work or riding :)
MikeFigielski
11-12-2005, 11:43 AM
The 50Amp units have a big 50 printed on the back of them. You should be able to see it while on the bike.
Mike
deilenberger
11-13-2005, 08:54 PM
Hmmm... be interesting to find out if my bike has a 460 or a 700. It's a 90 or a 91 (I forget offhand, no coffee yet...) but it was bought in 94 after a rebuild (previous owner laid it down, had A&S fix and sell). Probably a 460, I can't imagine the alternator needed replacement, but... I never thought there was possibly higher.

Any way to test that?

BelgLook at it. The early alternator had a fan on the front and none on the back. The 700W has a black housing on the rear of the alternator - that contains an additional cooling fan.

Just squat down and look.
Belg
11-13-2005, 09:00 PM
Bummer.. it's a 460. But hey, it powerred a garmin just fine... :) Just have to be careful how much I throw on it.