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Author Topic: CB 750 K0 — Me and the dog are building a bike. Finished!!  (Read 22469 times)

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Offline harisuluv

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #50 on: December 09, 2015, 11:52:39 AM »
I have a bunch of K0 gauges.  Ranging from excellent basically ready to go to semi disassembled/needing some work.  Tell me what level you want as price is different accordingly.  They're going to be around $150 each.
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Offline Roach Carver

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #51 on: December 09, 2015, 02:01:54 PM »
I need a good speedo or tach can't remember which . I will reply tonight
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Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #52 on: December 09, 2015, 02:37:35 PM »
PM Sent, Thanks so much!
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Offline harisuluv

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #53 on: December 09, 2015, 05:41:51 PM »
I went ahead and organized what I could, tested and made some notes on each one.  One or two I think was missing a jewel, I will include the missing jewel with it (I have some extras).

Price is going to range from $150 - $200+ per gauge.
« Last Edit: December 09, 2015, 05:45:17 PM by harisuluv »
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Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #54 on: December 11, 2015, 10:04:03 AM »
A little bit of progress this week, engine is prepped and ready for the rebuild. I need to get a few more odds and ends before I can get it back together.



Thanks again to everyone helping out with the parts search!
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Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #55 on: December 11, 2015, 10:14:50 AM »
Quick question:

Will a "Unicorn Triple Tree" work in conjunction with any steering yoke K0-K6? I'm unsure if I have an early or late one. It does have a lock.

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Offline MessnerMoto

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #56 on: December 11, 2015, 12:57:15 PM »
Nice work! How did you clean the engine?
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Offline Stev-o

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #57 on: December 11, 2015, 02:02:53 PM »
Quote from: dolamike on December 11, 2015, 10:14:50 AM
Quick question:

Will a "Unicorn Triple Tree" work in conjunction with any steering yoke K0-K6? I'm unsure if I have an early or late one. It does have a lock.



Yes.   Do you find one yet?
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #58 on: December 11, 2015, 02:27:09 PM »
Thanks MessnerMoto. Cleaning the engine turned out to be a really tough job. I read many, many threads on the subject here and on other forums.

Here's what I learned:

  • There are really no shortcuts here, this is hard work
  • Aluminum Heads and Cylinders should be cleaned with care, even razorblades can cause harm
  • Modern chemicals will not remove 35 years of baked on asbestos gasket
  • I personally do not want to spend weeks scrubbing asbestos gasket residue

For grease and general road gunk, a hot soak in degreaser works well.(Dawn dishwashing detergent with hours and hours of scrubbing) For the baked on gaskets I had a local machine shop resurface the cylinder and head. Relatively affordable and comes out great. they also cleaned them in their hot tank.

I will be rebuilding the original motor for this bike next winter, for that I am going to look into soda blasting or jet blasting. the results are hard to argue with.

Hope this helps!
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Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #59 on: December 11, 2015, 02:27:56 PM »
Quote
Quick question:

Will a "Unicorn Triple Tree" work in conjunction with any steering yoke K0-K6? I'm unsure if I have an early or late one. It does have a lock.



Yes.   Do you find one yet?


I'm trading emails with a couple of forum members, hopefully next week!
« Last Edit: December 11, 2015, 02:30:15 PM by dolamike »
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Offline Restoration Fan

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #60 on: December 11, 2015, 06:14:35 PM »
dolamike,
I have a couple of extra triple trees that were in the parts I bought for these bikes I'm working on and I won't be using them.  If you need one, shoot me a PM and you can have one for the cost of shipping.  Shouldn't be more than a few bucks.

Ron
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Ron

Stella - Logan's Senior Project    78 750K http://forums.sohc4.net/index.php?topic=141761.0

Logan's Reward - CB500 and CB550 Cafes    http://forums.sohc4.net/index.php/topic,147787.0.html

Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #61 on: December 11, 2015, 07:24:55 PM »
Quote
dolamike,
I have a couple of extra triple trees that were in the parts I bought for these bikes I'm working on and I won't be using them.  If you need one, shoot me a PM and you can have one for the cost of shipping.  Shouldn't be more than a few bucks.

Ron

Hey thanks that would be fantastic! You have the K0 unicorn one?

Let me know!
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Offline Restoration Fan

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #62 on: December 11, 2015, 09:15:59 PM »
No, I don't think either of mine is the K0 unicorn one.  I'll check them in the morning to be sure but I don't think they are.
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Ron

Stella - Logan's Senior Project    78 750K http://forums.sohc4.net/index.php?topic=141761.0

Logan's Reward - CB500 and CB550 Cafes    http://forums.sohc4.net/index.php/topic,147787.0.html

Offline SOHC4 Cafe Racer Fan

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #63 on: December 11, 2015, 11:18:08 PM »
Quote from: dolamike on December 11, 2015, 02:27:09 PM
Thanks MessnerMoto. Cleaning the engine turned out to be a really tough job. I read many, many threads on the subject here and on other forums.

Here's what I learned:

  • There are really no shortcuts here, this is hard work
  • Aluminum Heads and Cylinders should be cleaned with care, even razorblades can cause harm
  • Modern chemicals will not remove 35 years of baked on asbestos gasket
  • I personally do not want to spend weeks scrubbing asbestos gasket residue

For grease and general road gunk, a hot soak in degreaser works well.(Dawn dishwashing detergent with hours and hours of scrubbing) For the baked on gaskets I had a local machine shop resurface the cylinder and head. Relatively affordable and comes out great. they also cleaned them in their hot tank.

I will be rebuilding the original motor for this bike next winter, for that I am going to look into soda blasting or jet blasting. the results are hard to argue with.

Hope this helps!

What about vapor or soda blasting?
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #64 on: December 12, 2015, 10:54:27 AM »
Quote

What about vapor or soda blasting?


From what I have read and seen online they seem like the best option for a restoration before paint is applied. There is some commentary about Soda Blasting not being strong enough and Media or Vapor blasting leaving particulate in the engine.

I don't have any experience with either but the videos online are pretty convincing.


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Offline Stev-o

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #65 on: December 12, 2015, 11:30:37 AM »
NobleHops is a member here, does vapor blasting, it is very impressive.

I recently had my Kawasaki H2 motor done...

http://forums.sohc4.net/index.php/topic,150819.100.html
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Offline Restoration Fan

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #66 on: December 12, 2015, 11:36:16 AM »
We soda blasted the engine cases on Stella, after cleaning & degreasing them thoroughly.  As long as you have a compressor with good pressure, it works pretty well.  But it will in no way make them look as good as Vapor Blasting does.  I plan to send the 550 cases to NobleHops for him to do those on Logan's bike.

By the way, even with soda blasting, you still need to chase the threads in each hole...even if you completely wash down the cases and/or use vinegar followed by water.  We did that on Stella and ended up finding about 4 or 5 holes that still had soda packed inside them.  Which would have made getting a bolt into those holes really tough.
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Ron

Stella - Logan's Senior Project    78 750K http://forums.sohc4.net/index.php?topic=141761.0

Logan's Reward - CB500 and CB550 Cafes    http://forums.sohc4.net/index.php/topic,147787.0.html

Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #67 on: December 15, 2015, 09:52:42 PM »
Quote from: dolamike on December 07, 2015, 11:37:45 AM
Just to close the loop on the dowels, I found this thread with info from HondaMan with some history on them:

http://forums.sohc4.net/index.php?topic=91874.0

This lead me to here:

http://www.hondapartsnation.com/oemparts/a/hon/506b8ca9f870023420a1e916/cylinder

It looks like the part is still available, it's #3 in the diagram. I ordered all 8 new, there is no length mentioned, just "PIN, SPECIAL KNOCK (12MM)"

I'll measure them when they arrive and update then.

CB750 K8 Cylinder Dowels came in, looks like they are special, not the 12mmx15mm, image below.

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Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #68 on: December 15, 2015, 09:55:58 PM »
Just got the Hondaman book, really great, everyone working on these bikes should have a copy. I really like the background provided on the changes Honda made over the years, good stuff.

It immediately went into my library.



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Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #69 on: December 15, 2015, 10:04:31 PM »
I have a few questions on the swing arm, any help or input would be greatly appreciated.

First off, it looks like I have a combination of a later bushing on one side and an earlier on the other... is it common to replace just one side?

Good news is that I have the older version with the grease fittings on both ends and the better grooves.






I'll be replacing these with the brass ones as recommended...



The ones I bought in the photo have the collar on them, it sounded like Hondaman was recommending against the collar, although the ebay seller states this is the correct one for the K series bikes.

Any opinions on this?

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Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #70 on: December 15, 2015, 10:09:34 PM »
The electrical panel looks to be in bad shape, replace or keep?


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Offline martin99

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #71 on: December 15, 2015, 11:22:45 PM »
Handsome hound you have there.

Those battery boxes often look cruddy, battery acid and fumes takes it's toll after a while. In my experience though they usually clean up well and can be repainted/powdercoated. Strip it of all the electrical components and see what you have - if it's solid under the rust, you'll be able to restore it.
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Build threads:
77 750F2 Refresh Project http://forums.sohc4.net/index.php?topic=144075.0
TRIBSA http://forums.sohc4.net/index.php/topic,160296.0.html

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #72 on: December 15, 2015, 11:38:19 PM »
Quote from: dolamike on December 15, 2015, 09:55:58 PM
It immediately went into my library.


That's not grease!
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #73 on: December 19, 2015, 02:05:00 PM »
Rubber O-Ring Question CB750 k8

Engine parts are rolling-in and I'm starting to take inventory before I start the re-build. I bought a gasket kit for K0-K8 bikes but I seem to be missing 4 O-Rings. They are in red in the photos below...

Does anyone have the size or spec on these, are they only in the later engines? Are there any others you see missing?

Photos below:

Included in the kit:



Head:



Cylinders:



Engine Case:



Any info would be greatly appreciated!
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Offline dolamike

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Re: CB 750 K0 — Me and the dog are building a bike.
« Reply #74 on: December 19, 2015, 07:05:14 PM »
Looks like these are Part # 91310-426-000. 11x2.5 O-Ring.

Real lame that these aren't included in the Gasket Kit, I bought it at 4into1. It should be labeled not so complete.

http://4into1.com/ne-brand-complete-gasket-set-honda-cb750-1970-1978/

Real-Real Lame that they are $5.45 each at Hous of Honda, Part 22:

http://www.houseofhondaparts.com/fiche_section_detail.asp?section=2451871&category=Motorcycles&make=Honda&year=1978&fveh=131106

Has anyone tried generic O-Rings, looks like you can buy 400 for $15 on Amazon.

http://www.amazon.com/Performance-Tool-W5203-MetricO-Ring-Assortment/dp/B003Y88BPG/ref=sr_1_3?s=industrial&ie=UTF8&qid=1450580441&sr=1-3


« Last Edit: December 19, 2015, 07:08:34 PM by dolamike »
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