Author Topic: '72 CB750K project nearing completion - few more questions  (Read 16781 times)

0 Members and 2 Guests are viewing this topic.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
'72 CB750K project nearing completion - few more questions
« on: January 13, 2009, 11:31:54 am »
Finally getting around to a thread for the bike I've been tinkering on for the past few months.  I think this is my favorite section on this forum.
I really love seeing what everybody it doing, so I figured someone might like this as well....

Anyway I started with this:




Pics look much better than it does in person....

It's a 1972 CB750K that I had been keeping an eye on for some time.  The owner had found it at an estate sale and bought it with the intention of restoring it.
So, it sat in his garage amongst the other projects (57 t-bird, late 60's Harley and a 67 corvette) for several years.  He had never seen or heard it run, so we
agreed on $450

I spent few weeks getting it to start and run - with many questions to the forum...  but the only thing I really had to do was buy a new battery, and clean the carbs.
The carbs took 3 cleanings to get them "really clean"   You guys - when two-tired tells you that carbs must be clean for the bike to run correctly, he's really right.



I rode it most of the summer like that, trying to figure out what I wanted to do with it.   I tried different colors  (spray paint) and that didn't help much, so spent a weekend
polishing the side covers on my trusty buffer



Finally I stumble upon these cats in Japan - "brat style"  and figured I wanted something similar



So, off to photoshop....  I want to end up with something like this:    Not too far from the original....



God bless simple green....





« Last Edit: March 23, 2009, 05:21:47 am by greenjeans »
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #1 on: January 13, 2009, 11:40:19 am »
I decided that I just had to have some of those vintage tread Firstone Super Champions,  found some at Coker Tire.  I wanted to kinda camoflague the bike
somehow, so it wasn't immediatly noticeable as a Honda, so I decided to try and run a front drum brake on there....

I know that this make no earthly sense at all, I just liked the looks of them.  So I found one here for $40.   Of couse it looked like it had been stored at the
bottom of a lake:   Spokes had been torched out !!!





That was a weekend project just to get it cleaned.    I got some new bearings and shoes and polished and bead blasted the drum and now it
looks quite respectable.   Went ahead and put new bearings and shoes on the back as well.

Yep, I'm the kid that figured out how to put things back together...eventually.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #2 on: January 13, 2009, 11:45:06 am »
Then, close to x-mas a miracle happened....(in my eyes at least)  A vendor that I work with offered to powdercoat my frame for FREE!
I thought he was kidding and told him not to joke, because I'd blow it apart that night and bring him the pieces.

3 days later I had a powdercoated frame.  I almost cried.    Then I feverishly cleaned and cleand and cleaned the engine.  I thought about
putting new rings and gaskets in the motor while it was out of the frame, but decided against it since it ran fine and doesn't leak. (hopefully it still won't after the cleaning)

I did take the time to polish the cases and the valve cover and give the engine a squirt of silver engine paint....man that really makes a difference.


« Last Edit: February 17, 2009, 10:42:55 am by greenjeans »
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #3 on: January 13, 2009, 11:49:14 am »
Since my rims were really starting to show their age, the chrome just wasn't shining up and the spokes were all rusty,  I threw the rims into the box of parts that went to the powder coater.  Hard to mess up black.    I went ahead and stayed away from the bars and ate cheaply for a week and ordered some new stainless spokes so I could finally put the wheels back together and get this thing rolling:





Hard to believe that is the same hub & rim.
« Last Edit: January 13, 2009, 11:55:23 am by greenjeans »
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #4 on: January 13, 2009, 11:50:39 am »
Finally, a roller



Now I could drop the motor back in with the help of my trusty engine lift and some buddies:







« Last Edit: January 13, 2009, 11:56:10 am by greenjeans »
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #5 on: January 13, 2009, 11:59:28 am »
Now I'm back to real time.... Up next is the wiring.  I decided to re-use my existing harness and just clean and re-wrap it.
This weekend I'll be working on filling in the emblems on the tanks and side covers, and trying to get rid of the poorly applied Kreme
liner that was in the tank.

I've had it soaking with MEK for a day now and it's working.  I was quite relieved to find that the tank is really solid - it wasn't really that rusty inside, so I hoping after some easy rust cleaning I won't have to coat it.

** Does anybody have a trick to getting an old liner out of there ???  It's Kreme.  The MEK is softening it and turning it to goo,
     but the goo won't quite pour out....  Any ideas ???

Here's a shot of my wiring before cleaning:

« Last Edit: January 13, 2009, 04:52:31 pm by greenjeans »
Yep, I'm the kid that figured out how to put things back together...eventually.

BillyBoring

  • Guest
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #6 on: January 13, 2009, 12:00:41 pm »
Looks great. Can't wait to see the progress. People are gonna call you crazy but i too like the drum look. Tires look great too. Keep it up. Are those forks stock length?

Offline rbmgf7

  • 2>4
  • Expert
  • ****
  • Posts: 881
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #7 on: January 13, 2009, 12:04:14 pm »
kewl. i always liked the jap style chopper with the slammed bike a fat tire in the front

Offline Really?

  • I've come to the conclusion that I AM a
  • Really Old Timer ...
  • *******
  • Posts: 5,264
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #8 on: January 13, 2009, 12:07:43 pm »
So, this is what CBGhia was talking about.  He weren't lying, that is really nice!
I don't have a motorcycle, sold it ('85 Yamaha Venture Royale).  Haven't had a CB750 for over 40 years.

The Wife's Bike - 750K5
The Kid's Bike - 750K3

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #9 on: January 13, 2009, 12:22:58 pm »
Fork, for the moment, are still stock length.  I plan on lowering them about 1"
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline Speed King

  • Enthusiast
  • **
  • Posts: 218
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #10 on: January 13, 2009, 12:43:18 pm »
Nice job, really looks good. Are you painting the tins black?

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #11 on: January 13, 2009, 12:55:42 pm »
Tins and side covers will be PPG Radiance Candy  cinnamon over gold....
Kinda looks like Jack Daniels poured over ice. 
Basecoat will be gold, followed by some small metalflake then the candy tint, then clear....

Want a bit of of the 70's in there.    Hope to have the paint started next week - if it warms up any around here....
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline Spikeybike

  • when planting C4 at your enemy's base make sure you don't use a
  • Really Old Timer ...
  • *******
  • Posts: 7,265
  • member #1150
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #12 on: January 13, 2009, 01:05:19 pm »
Fork, for the moment, are still stock length.  I plan on lowering them about 1"

the 550 forks are around 2' shorter then the 750 , if you don't want the look of the tubes poking up through the trees

love the tire choice, lookin real mean ..   8) 8)

Offline Speed King

  • Enthusiast
  • **
  • Posts: 218
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #13 on: January 13, 2009, 01:34:24 pm »
Tins and side covers will be PPG Radiance Candy  cinnamon over gold....
Kinda looks like Jack Daniels poured over ice. 
Basecoat will be gold, followed by some small metalflake then the candy tint, then clear....

Want a bit of of the 70's in there.    Hope to have the paint started next week - if it warms up any around here....


That sounds amazing. This will be one for the inspiration thread.

Offline pddpimp

  • Hot Shot
  • ***
  • Posts: 342
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #14 on: January 13, 2009, 03:45:23 pm »
Man, the bike looks awesome. Keep up the good work.
When the majority of the United States population get to be 70 years old, they will finally realize what is really important. And by then it'll be too late.


-'77 CB750 Cafe/Muscle bike (early clone)
Soon to have a hopped up 836cc *sold*

-'75 CB750 with a little bit of character

Offline Sheik Yerbouti

  • Likes the warm feeling but is tired of all the dehydration.
  • Hot Shot
  • ***
  • Posts: 427
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #15 on: January 13, 2009, 04:01:45 pm »
This might just be my favorite bike I've seen thusfar. I like the style a lot, and I love those tires.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #16 on: January 13, 2009, 04:40:24 pm »
Here's a pic of my homemade ghetto bearing retainer removal tool.

Remember it's critical to drill out the punch marks from the factory....it will then spin out pretty easily:





I'm not going to run stock guages on this bike (too big) so I ground off the old mounts and repainted black:






Yep, I'm the kid that figured out how to put things back together...eventually.

Offline Blasbo

  • Hot Shot
  • ***
  • Posts: 358
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #17 on: January 14, 2009, 03:00:40 pm »
<aol>
Me too, me too!
</aol>
Gotta say that is a way cool look. I can't wait to see it finished.

Offline SKTP

  • Master
  • *****
  • Posts: 1,788
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #18 on: January 14, 2009, 03:46:16 pm »
I am watching this thread everyday...looking amazing...those tires are fatties for a SOHC are they not? Awesome.
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline starion88esir

  • Enthusiast
  • **
  • Posts: 124
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #19 on: January 14, 2009, 04:19:31 pm »
I wish 'd have made a nifty bearing retainer tool like that before I ruined mine.

Build looks great!
71 CB175 - next project
76 CB750F - current project

Offline Flying J

  • Old Timer
  • ******
  • Posts: 3,386
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #20 on: January 15, 2009, 10:46:19 am »
Where did you get thoses tires and what kind are they? Im going to do a similar style when i get to working on my 550.

Offline greenjeans

  • Industrial strengthed dreamer.
  • Old Timer
  • ******
  • Posts: 2,962
  • 1972 CB750K2
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #21 on: January 15, 2009, 10:51:40 am »
Firestone Deluxe Champions.   I got them at Coker tire.    FYI  the tires really look cool, but they handle like truck tires...and when I say truck tires, i really mean
the handle like sh!#   But they do look cool......   Oh, what we do for looks.
« Last Edit: February 17, 2009, 10:48:40 am by greenjeans »
Yep, I'm the kid that figured out how to put things back together...eventually.

Offline Retro Rocket

  • Eggs are hard due too a
  • Really Old Timer ...
  • *******
  • Posts: 19,279
  • ROCK & ROLL
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #22 on: January 15, 2009, 03:54:22 pm »
Those tyres with the straight through style tread would track really bad, they would follow deviations in the road surface, look really cool though..... ;D

Mick
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline chrislib

  • Hot Shot
  • ***
  • Posts: 345
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #23 on: January 15, 2009, 04:50:01 pm »
Looks great. The Cokers and front drum fit nicely.
Chris...closet Idlefiddler
#1975
1973 CB750K...CANDY BACCHUS OLIVE

Offline Retro Rocket

  • Eggs are hard due too a
  • Really Old Timer ...
  • *******
  • Posts: 19,279
  • ROCK & ROLL
Re: 72 CB750K bobber/brat/cycle My new/old project
« Reply #24 on: January 15, 2009, 05:15:10 pm »
I wish i wasn't such a "technophobe" when it comes to photoshop. It makes far more sense to build a "virtual" bike and get the look right first before modifying anything.....I have an idea for a bike at the moment and would love to be able to "see it" before actually building it.

Mick
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.