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77 650 alternator 25 Oct 2005 13:25 #4160

  • zippoman
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ok, I'm getting a little over 15 volts @ 4000 rpm, should be good right? Not really sure what was wrong, cleaned all my connections and cleaned and adjusted the regulator. thanks for the replies!

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77 650 alternator 26 Oct 2005 09:29 #4397

  • loudhvx
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zippoman wrote:

ok, I'm getting a little over 15 volts @ 4000 rpm, should be good right? Not really sure what was wrong, cleaned all my connections and cleaned and adjusted the regulator. thanks for the replies!

A little over 15v on the battery is too high. It'll cook the battery. The regulator is maechanical on the 77 650. It is adjustable internally, but I would recommend a solid state replacement.

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77 650 alternator 26 Oct 2005 12:08 #4442

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how do I need to adjust the regulator so it will give me about 14.5 volts? Do I open or close the upper or lower conntacts to reduce the voltage. I guess I was happy just to see it charge again!

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77 650 alternator 26 Oct 2005 12:12 #4444

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someone with a 650 manual will have to help on that one.

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77 650 alternator 26 Oct 2005 12:37 #4449

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I have a manual but it only gives a base setting. Im thinking it just needs to be tweeked a little bit, I will take a guess if I need to just hate to screw it up now.

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77 650 alternator 27 Oct 2005 11:38 #4677

  • luvmykaw
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Hey Zippo. I think that Cactus, a member?, former member? dunno, did a big write up on cleaning/refurbishing a regulator. It should still be in the old site archive above. You can also try to U2U him or find his email address in the old site user base. I know that his post was accompanied by a pile of pictures also. It might help.

The regulator on a 77 kz650 b1 has the same part number and swaps with:

74 400
77 400 A1
78 400 A2
75 400 D
76 400 D3
77 400 D4
75 400 S
76 400 S2
77 400 S3
77 650 C1

Post edited by: luvmykaw, at: 2005/10/27 15:31

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77 650 alternator 27 Oct 2005 14:46 #4725

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Hey thanks, thats where I got the idea to take it all apart and clean it. Found a solid state regulator from a guy at oregon motorcycle parts, anybody ever dealt with him? Anyway I'm giving up on the old regulator and hope this will be more dependable, at least its charging now.

Thanks

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77 650 alternator 27 Oct 2005 18:23 #4773

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Make sure he is aware that the 77 650's are different than the other KZ 650's and different from most other KZ's.

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77 650 alternator 27 Oct 2005 19:27 #4797

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He says it will work, I think this guy makes them himself and stands behind his stuff .... I guess Im gonna find out.

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