« previous next »
Pages: [1]   Go Down

Author Topic: 78'750F to K conversion?  (Read 1421 times)

0 Members and 1 Guest are viewing this topic.

Offline zeus87

  • Enthusiast
  • **
  • Posts: 185
78'750F to K conversion?
« on: June 17, 2008, 09:58:56 PM »
Just picked up a 78' CB750F with 11,000 orig miles on it.  It is in rough shape, carbs are a wreck...electrical is chopped, boots and airbox are old and dry rotten.  Anyway i plan on pulling the engine, and sitting it aside untill my 40,000mile K engine gets tired.  Anyway...I want to swap the front end, its just that easy correct?  Also, what about the rear disc setup?  do i need to swap swingarms or is it just a few bolts.. Thanks guys!
P.S looking to swap these parts over to my 78' CB750 K
Logged

Offline zeus87

  • Enthusiast
  • **
  • Posts: 185
Re: 78'750F to K conversion?
« Reply #1 on: June 18, 2008, 09:24:24 AM »
someone has done this before??
Logged

Offline goon 1492

  • Sucka Repellant
  • Master
  • *****
  • Posts: 2,088
  • RIGHT ON TO THE REAL AND DEATH TO THE FAKERS
Re: 78'750F to K conversion?
« Reply #2 on: June 18, 2008, 09:29:29 AM »
Did you try a search, I have seen several threads on cafe bikes that were once a K bike and they put F discs on the rear, if no luck give it more time and someone will chime in.
Logged
We are not humans going thru a spiritual experience...
We are spirits going thru a human experience....

Offline UnCrash

  • Pass
  • Master
  • *****
  • Posts: 1,705
    • My Blog
Re: 78'750F to K conversion?
« Reply #3 on: June 18, 2008, 09:34:59 AM »
The front swap should be fairly straighforward if you want to just slide the fork tubes up into the K triple.  You'll need to use the F master cylinder as well.  I'm not sure if the K has the mounting point for the brake line splitter from one to two or not so you'll need to take look at that.

The rear will probably require the F swing arm along with the wheel and the braking components.  You may have to rig up a hanger for the master cylinder as well. 

Looking at both bikes closely will help you determine if there are brackets in place for the rear master cylinder which will work and if there are hose clips that will work as well.
Logged
You can't make too much popcorn, but you can definately eat too much popcorn.

Offline shoemanII

  • Enthusiast
  • **
  • Posts: 206
  • just another bike nut
Re: 78'750F to K conversion?
« Reply #4 on: June 18, 2008, 09:43:32 AM »
i just picked up a '78F w/a '78K motor in it and '78F carbs.  engine is strong as hell w/excellant compression.  very nice chrome everywhere and the bike is pretty sweet except for the drive:  chain/sprockets and rear wheel bearings needed replacement as did the steering head bearings.  

am pretty sure the F front will mount directly to the front K.  i assume you intend to swap the triples?  that's for the brake line splitter mount  swapping over to the rear disc might be a little tricky tho.  swingarm looks similar to my '78K but you'll need to swap the footpeg brackets and figure a place for the brake arm mount on the frame.  someone here may have done it, but not me.  good luck,
bobp

ps - if you decide to not do the rear disc swap, i'd be interested in the R footpeg bracket.  need a spare for some experimental milling work.    
« Last Edit: June 18, 2008, 09:45:32 AM by shoemanII »
Logged
'96 ducati carb'd 900ss/cr 
'72 dt2
'77cb550k frankenberry:  '77cb550k frame, '78cb550k engine, '78cb550f tank, unknown front-end

Offline zeus87

  • Enthusiast
  • **
  • Posts: 185
Re: 78'750F to K conversion?
« Reply #5 on: June 18, 2008, 09:59:24 PM »
alright, picking it up saturday...I will let you know what i find..
Logged
Pages: [1]   Go Up
« previous next »