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Author Topic: CB750 K3F - AKA The Red  (Read 50612 times)

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Offline 70CB750

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CB750 K3F - AKA The Red
« on: November 24, 2012, 10:14:51 am »
K3 frame will have F wheels, swing arm, fork and engine.
Mounted center stand, tripple needs bearings installed.
« Last Edit: September 01, 2015, 06:58:16 am by 70CB750 »

Offline 70CB750

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CB750 K3F
« Reply #1 on: November 24, 2012, 10:17:12 am »
Rear master cylinder is from 2003 Honda CBR954r, but the brake lever will be from F - it will need new bracket on the frame
« Last Edit: December 24, 2012, 03:53:36 am by 70CB750 »

Offline 70CB750

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Re: CB750 K3F
« Reply #2 on: December 07, 2012, 03:51:40 am »
Installing steering head bearing race.   In my stash I found a body lift block that is the perfect size to drive the race in.

Of course having the frame upside down helps too.

Offline Killer Canary

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Re: CB750 K3F
« Reply #3 on: December 07, 2012, 04:34:05 am »
G'morning; are you using up parts or did you find bike?
If it's worth doing at all it's worth over-doing.
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Offline 70CB750

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Re: CB750 K3F
« Reply #4 on: December 07, 2012, 05:01:56 am »
Good Morning.

Actually both.  I have a K3 frame that came from a rolling frame (tank, wheels, frame and tacho and speedo) and fork, engine and wheels from F2  - will be an interesting crisscross  ;D
« Last Edit: December 07, 2012, 05:05:10 am by 70CB750 »

Offline Xnavylfr

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Re: CB750 K3F
« Reply #5 on: December 07, 2012, 06:00:45 am »
I think the F used a different swingarm because of the DISC brake!!!  I'm not positive but I do remember they were a little different!!


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Offline 70CB750

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Re: CB750 K3F
« Reply #6 on: December 07, 2012, 06:03:43 am »
Yes, I will have to use F2 swingarm but it should bolt right into the frame.

Offline 70CB750

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Re: CB750 K3F
« Reply #7 on: December 14, 2012, 03:24:21 am »
Installed bearings on the tripple tree, here it is in the frame for mock up.  The top bracket for F is taller than K bracket, I kind of like it with the K3 light panel.

Offline Killer Canary

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Re: CB750 K3F
« Reply #8 on: December 14, 2012, 06:33:41 am »
I don't recall ever seeing anyone doing a meld of F and K bikes here before; should be interesting. :)
If it's worth doing at all it's worth over-doing.
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Offline 70CB750

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Re: CB750 K3F
« Reply #9 on: December 14, 2012, 03:34:11 pm »
Mockup with front fork and brake in place.

Offline cb650PK

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Re: CB750 K3F
« Reply #10 on: December 16, 2012, 10:40:21 am »
S CB750 na vecne casy a nikdy jinak.

Offline 70CB750

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Re: CB750 K3F
« Reply #11 on: December 16, 2012, 10:46:57 am »
Thanks!

Offline CB_Jeff

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Re: CB750 K3F
« Reply #12 on: December 16, 2012, 01:36:03 pm »
I will be interested to see this come together.
I have a simular project on the back burner... '75 750k frame, 76 F swingarm and rear brake set-up and a GL1000 fork and dual disk front wheel.   
I have been told that the only complication to doing this is mounting the rear master cylinder to the frame as the K frame does not have those mounting tabs.

Offline 70CB750

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Re: CB750 K3F
« Reply #13 on: December 24, 2012, 03:55:22 am »
I will be interested to see this come together.
I have a simular project on the back burner... '75 750k frame, 76 F swingarm and rear brake set-up and a GL1000 fork and dual disk front wheel.   
I have been told that the only complication to doing this is mounting the rear master cylinder to the frame as the K frame does not have those mounting tabs.

Yes, mounting the rear master cylinder and the brake pedal plus left top shock mount on the frame.

Offline 70CB750

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Re: CB750 K3F
« Reply #14 on: January 12, 2013, 08:49:35 am »
The boss shows up in the shop:

"Prey tell me what is that?" pointing at the motorcycle frame.

I didn't miss a beat using magical words:

"That is a father-son project."

All was well :)

Offline 70CB750

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Re: CB750 K3F
« Reply #15 on: January 14, 2013, 02:59:56 am »
Mock up with 78 swing arm and handlebars.
« Last Edit: January 14, 2013, 03:02:42 am by 70CB750 »

Offline 70CB750

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Re: CB750 K3F
« Reply #16 on: January 14, 2013, 03:02:07 am »
The top bracket is almost there.  Towers are taller and the angle tilts the light board more to the back than K models, I can get used to it.

Offline 70CB750

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Re: CB750 K3F
« Reply #17 on: January 14, 2013, 03:26:42 am »
Now the fan begins.  The master cylinder must go somewhere here.

Offline 70CB750

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Re: CB750 K3F
« Reply #18 on: January 14, 2013, 03:44:01 am »
I have F pedal and F shaft and also K shaft - they both fit, the difference is the length and K can utilize return spring too.

Time to get creative.

Offline 70CB750

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Re: CB750 K3F
« Reply #19 on: January 22, 2013, 06:24:52 am »
Looks like the F harness is in good shape, will use it after trimming off what I dont need - like wires for clutch switch and such.

Scored a wiring diagram, that's a good start.

Offline 70CB750

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Re: CB750 K3F
« Reply #20 on: January 24, 2013, 04:26:01 am »
New fuse box rewired to the old plug.

Offline 70CB750

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Re: CB750 K3F
« Reply #21 on: January 24, 2013, 04:26:50 am »
Starter relay needs just little cleaning.

Offline 70CB750

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Re: CB750 K3F
« Reply #22 on: January 24, 2013, 04:29:16 am »
Battery box, cleaned and painted and F air box in K3 frame.

It is cold these days, I don't get much done, but I take more pictures  ;D

Offline 70CB750

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Re: CB750 K3F
« Reply #23 on: January 28, 2013, 04:31:19 am »
Engine in the frame.  Those sprockets indeed line up.

Offline 70CB750

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Re: CB750 K3F
« Reply #24 on: January 28, 2013, 04:32:48 am »
Time to do some cutting and welding to accomodate rear master cylinder and the right shock absorber.

 

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