Author Topic: CB750 K3F - AKA The Red (Read 118529 times)

70CB750 · « **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.

70CB750 · « **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

70CB750 · « **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.

Killer Canary · « **Reply #3 on:** December 07, 2012, 04:34:05 AM »

G'morning; are you using up parts or did you find bike?

70CB750 · « **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

Xnavylfr · « **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!!

Xnavylfr(CHUCK)

70CB750 · « **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.

70CB750 · « **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.

Killer Canary · « **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.

70CB750 · « **Reply #9 on:** December 14, 2012, 03:34:11 PM »

Mockup with front fork and brake in place.

cb650PK · « **Reply #10 on:** December 16, 2012, 10:40:21 AM »

Tarozzi makes nice fork brace for those forks.http://www.fastfromthepast.com/servlet/the-496/Fork-Brace-Honda-CB750F/Detail

70CB750 · « **Reply #11 on:** December 16, 2012, 10:46:57 AM »

Thanks!

CB_Jeff · « **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.

70CB750 · « **Reply #13 on:** December 24, 2012, 03:55:22 AM »

Quote from: CBCafe_Jeff 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.

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

70CB750 · « **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

70CB750 · « **Reply #15 on:** January 14, 2013, 02:59:56 AM »

Mock up with 78 swing arm and handlebars.

70CB750 · « **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.

70CB750 · « **Reply #17 on:** January 14, 2013, 03:26:42 AM »

Now the fan begins. The master cylinder must go somewhere here.

70CB750 · « **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.

70CB750 · « **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.

70CB750 · « **Reply #20 on:** January 24, 2013, 04:26:01 AM »

New fuse box rewired to the old plug.

70CB750 · « **Reply #21 on:** January 24, 2013, 04:26:50 AM »

Starter relay needs just little cleaning.

70CB750 · « **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

70CB750 · « **Reply #23 on:** January 28, 2013, 04:31:19 AM »

Engine in the frame. Those sprockets indeed line up.

70CB750 · « **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.

News:

Author Topic: CB750 K3F - AKA The Red (Read 118529 times)