Author Topic: CB750 K3F - AKA The Red  (Read 49635 times)

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Offline MoMo

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Re: CB750 K3F - AKA The Red
« Reply #450 on: December 31, 2018, 02:18:01 pm »
Bah...just be sure and let us know if that particular mod has good results.  I remember an old thread where it was discussed and created quite a controversy.



Like how many forum members does it take to tie vent tubes together?

Offline 70CB750

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Re: CB750 K3F - AKA The Red
« Reply #451 on: March 01, 2019, 05:54:32 am »

Offline 70CB750

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Re: CB750 K3F - AKA The Red
« Reply #452 on: May 08, 2019, 04:18:24 am »
She stopped charging.  I am currently in the slow and painful process of recalling my electrical engineering  education.  ;D

So far it looks like the coil, white wire against the ground has infinite resistance, that ain't right.

Offline 70CB750

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Re: CB750 K3F - AKA The Red
« Reply #453 on: May 11, 2019, 03:21:27 am »
The coil against the field had about 9 ohms while on the bike.   When I took it off, the same measurement was infinite resistance.  Seems like trouble is in connecting wires.  I took off the tape and inspected and redone connections that seemed suspicious.

Now all checks out.

I also got frustrated with electronic meter and used this antique machine instead.  Yes, it is big and clumsy but it works well.

Offline calj737

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Re: CB750 K3F - AKA The Red
« Reply #454 on: May 11, 2019, 04:41:40 am »
this antique machine instead.  Yes, it is big and clumsy but it works well.
Hey! I resemble that remark  >:(
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Offline 70CB750

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Re: CB750 K3F - AKA The Red
« Reply #455 on: May 11, 2019, 07:03:35 am »
this antique machine instead.  Yes, it is big and clumsy but it works well.
Hey! I resemble that remark  >:(

 ;D ;D

Offline 70CB750

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Re: CB750 K3F - AKA The Red
« Reply #456 on: May 15, 2019, 03:23:21 am »
She is back on the road and charges as requested.  Makes quite the difference in headlight and turn signals.  ;D

Offline Stev-o

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Re: CB750 K3F - AKA The Red
« Reply #457 on: May 15, 2019, 03:08:55 pm »
Good news
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Offline 70CB750

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Re: CB750 K3F - AKA The Red
« Reply #458 on: May 30, 2019, 03:28:16 am »
Knock on wood, she should be fine now as far as charging.

I had my doubts about the stator, but it charged with the jumper cable on regulator.  I took out the rectifier and there was a small piece of insulation missing from the red output wire, I replaced that and it should be it, finally. 

It was several issues:

- stator and coil leads had conductive connection somewhere before the big 8 plug
- one of the coil leads was basically broken
- one of the stator leadconnectors was pretty much rotten off
- output from rectifier had broken insulation


I learned a lot, hopefully all I need to do is to get new gaskets and seal shift cover and alternator for good.

Offline 70CB750

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Re: CB750 K3F - AKA The Red
« Reply #459 on: August 21, 2019, 05:15:50 am »
Added case savers.  Dorky, yes, but I can live with that. ;D

Offline calj737

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Re: CB750 K3F - AKA The Red
« Reply #460 on: August 21, 2019, 06:13:37 am »
Many years back I took a riding course led by a noted professional rider. Course was street-oriented though we were on a track riding our own bikes. The Instructor had this to say about crash bars and case savers:
They are more likely to get you killed if you lay a bike down because they will bite and pivot the bike end-for-end, throwing you off badly. They will limit your ability to maneuver the bike tightly and heaven forbid your leg gets between the asphalt and the bars because you will lose your leg. Are any of these likelihood’s worth saving a motor from some scrapes?


I found this to be a really keen insight to an accessory I see on many street bikes and always think back to that advice. Sure, on a dual sport or trail bike they make sense. But personally I would never use them on the street.

Just some concerned friendly input.
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Offline edwardmorris

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Re: CB750 K3F - AKA The Red
« Reply #461 on: August 21, 2019, 09:47:56 am »
Many years back I took a riding course led by a noted professional rider. Course was street-oriented though we were on a track riding our own bikes. The Instructor had this to say about crash bars and case savers:
They are more likely to get you killed if you lay a bike down because they will bite and pivot the bike end-for-end, throwing you off badly. They will limit your ability to maneuver the bike tightly and heaven forbid your leg gets between the asphalt and the bars because you will lose your leg. Are any of these likelihood’s worth saving a motor from some scrapes?


I found this to be a really keen insight to an accessory I see on many street bikes and always think back to that advice. Sure, on a dual sport or trail bike they make sense. But personally I would never use them on the street.

Just some concerned friendly input.

Believe it or not, I heard nearly the same thing at the MSF safety course I took few years back and skipped them...

Offline 70CB750

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Re: CB750 K3F - AKA The Red
« Reply #462 on: September 11, 2019, 03:03:25 am »
Speedometer died.  It would still count miles but it showed either 0 or off the scale mph.  I found a decent used one on ebay and swapped out the face.  Lost only 2300 miles in count, I can live with that. 

 

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