Author Topic: My K8 re-conditioning  (Read 15554 times)

0 Members and 2 Guests are viewing this topic.

Offline Mark1976

  • Hot Shot
  • ***
  • Posts: 628
Re: My K8 re-conditioning
« Reply #350 on: May 25, 2023, 01:51:19 pm »
Damn attractive bike ya got there...
Start with the end in mind...

Offline newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,081
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: My K8 re-conditioning
« Reply #351 on: May 25, 2023, 01:55:50 pm »
Sweet
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,175
  • Central Texas
Re: My K8 re-conditioning
« Reply #352 on: May 25, 2023, 03:56:42 pm »
Looks fantastic and paint color appears to match perfectly
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline denward17

  • Expert
  • ****
  • Posts: 1,315
Re: My K8 re-conditioning
« Reply #353 on: June 01, 2023, 11:15:20 am »
Broke out the simichrome and touched up a bit.....

Offline grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 14,955
  • I love to restore & travel. Keep'em Going Strong !
Re: My K8 re-conditioning
« Reply #354 on: June 01, 2023, 11:18:00 am »
Broke out the simichrome and touched up a bit.....

 8) 8)
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 9,605
  • 1969 cb750
Re: My K8 re-conditioning
« Reply #355 on: June 01, 2023, 12:56:14 pm »
Broke out the simichrome and touched up a bit.....

 8) 8)

+1. Very nicer!

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,201
  • SOHC4 member # 2605
Re: My K8 re-conditioning
« Reply #356 on: June 01, 2023, 01:08:39 pm »
Looks very nice.
David
David- back in the desert SW!

Offline Gamma

  • Hot Shot
  • ***
  • Posts: 502
  • Bike Magazine august 1980 page 71. me on my F1
Re: My K8 re-conditioning
« Reply #357 on: June 01, 2023, 01:25:25 pm »
Great work

Offline denward17

  • Expert
  • ****
  • Posts: 1,315
Re: My K8 re-conditioning
« Reply #358 on: June 02, 2023, 03:59:24 pm »
Discovered a leaking oil tank line this afternoon after a 20 mile ride.  Will be calling a few hydraulic shops next week to see if they can be repaired.

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,201
  • SOHC4 member # 2605
Re: My K8 re-conditioning
« Reply #359 on: June 02, 2023, 06:52:06 pm »
You likely will need to harvest the ends from your old lines and the shop is likely to have tools to do this. If they don't then several good measurements and then you will dissect your hoses for the ends. They will need to clock the ends correctly. So, they get the new hose made correctly. But they would be unlikely to have ends that mate to the motor and tank correctly as they are custom parts Honda spec'd.
David- back in the desert SW!

Offline BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 9,605
  • 1969 cb750
Re: My K8 re-conditioning
« Reply #360 on: June 05, 2023, 05:58:51 pm »
Can’t tell from the photo, where is it leaking?

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,481
  • Bike almost back to the 70's 2015
Re: My K8 re-conditioning
« Reply #361 on: June 05, 2023, 09:56:37 pm »
Is the alu cruch washer OK and properly tightened at the tank connection?
If it can leak and flow downwards.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline denward17

  • Expert
  • ****
  • Posts: 1,315
Re: My K8 re-conditioning
« Reply #362 on: June 06, 2023, 04:39:00 am »
I don't think it is leaking at the fitting on tank, it appears the hose itself is weeping.

Will know more when I have a chance to remove it, traveling this week, will get to it next week.

Offline BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 9,605
  • 1969 cb750
Re: My K8 re-conditioning
« Reply #363 on: June 06, 2023, 09:38:15 am »
I don't think it is leaking at the fitting on tank, it appears the hose itself is weeping.

Will know more when I have a chance to remove it, traveling this week, will get to it next week.

Neither hose runs at any real pressure, so that would be odd. Sure the kicker seal isn’t leaking and dripping on the hose?

Offline denward17

  • Expert
  • ****
  • Posts: 1,315
Re: My K8 re-conditioning
« Reply #364 on: June 06, 2023, 01:13:28 pm »
I don't think it is leaking at the fitting on tank, it appears the hose itself is weeping.

Will know more when I have a chance to remove it, traveling this week, will get to it next week.

Neither hose runs at any real pressure, so that would be odd. Sure the kicker seal isn’t leaking and dripping on the hose?

Thanks for the tip, will check that.....

Offline MRieck

  • Really Old Timer ...
  • *******
  • Posts: 10,548
  • Big ideas....
Re: My K8 re-conditioning
« Reply #365 on: June 06, 2023, 05:06:24 pm »
How is the bike running....any extra power etc?
Owner of the "Million Dollar CB"

Offline denward17

  • Expert
  • ****
  • Posts: 1,315
Re: My K8 re-conditioning
« Reply #366 on: June 07, 2023, 07:13:34 am »
^Well, I haven't been WOT yet.  Only have about 350 miles.

And, I really don't have a reference, but the engine responds well the couple of times I went to about 6-7K RPMs in 2nd and 3rd.

The bike was barely running when I got it, and too dangerous to try to ride, so that's the reference I was referring to.
« Last Edit: June 07, 2023, 07:40:51 am by denward17 »

Offline MRieck

  • Really Old Timer ...
  • *******
  • Posts: 10,548
  • Big ideas....
Re: My K8 re-conditioning
« Reply #367 on: June 07, 2023, 12:14:27 pm »
^Well, I haven't been WOT yet.  Only have about 350 miles.

And, I really don't have a reference, but the engine responds well the couple of times I went to about 6-7K RPMs in 2nd and 3rd.

The bike was barely running when I got it, and too dangerous to try to ride, so that's the reference I was referring to.
At 350 miles you can open it up......it'll be fine. ;)
Owner of the "Million Dollar CB"

Offline denward17

  • Expert
  • ****
  • Posts: 1,315
Re: My K8 re-conditioning
« Reply #368 on: June 14, 2023, 12:30:17 pm »
Installed new oil lines today, what a pain.

I was a little concerned, had a small kink in the feed line (back hose from oil tank). I let it run in the garage for about 15-20 mins.

No oil leaks and good oil pressure according to gauge on the oil galley.  Tank was getting hot and I could see a little bubbling inside the tank, so I guess the oil line is ok.

Offline scubanerdnick

  • Full Member
  • *
  • Posts: 71
Re: My K8 re-conditioning
« Reply #369 on: July 03, 2023, 05:41:06 am »
I just bought a 1978 myself and really enjoyed reading through this entire thread!  I learned a ton from reading all the comments and your bike looks beautiful.  I learned to ride on a 1978 CB750K in that exact color and pinstriping.  I bought this one to try to recreate it and to see one like I remember in your thread was pretty inspiring!  Beautiful bike and great documentation for everyone to see the evolution.  Thanks for sharing it.

Offline newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,081
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: My K8 re-conditioning
« Reply #370 on: July 03, 2023, 06:00:08 am »
I just bought a 1978 myself and really enjoyed reading through this entire thread!  I learned a ton from reading all the comments and your bike looks beautiful.  I learned to ride on a 1978 CB750K in that exact color and pinstriping.  I bought this one to try to recreate it and to see one like I remember in your thread was pretty inspiring!  Beautiful bike and great documentation for everyone to see the evolution.  Thanks for sharing it.
Welcome aboard Nick
Are you going to start your own project thread on your bike?
Also, go to the new members introduction section and introduce yourself and your bike. Pictures are always welcome.
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline denward17

  • Expert
  • ****
  • Posts: 1,315
Re: My K8 re-conditioning
« Reply #371 on: July 03, 2023, 07:54:40 am »
I just bought a 1978 myself and really enjoyed reading through this entire thread!  I learned a ton from reading all the comments and your bike looks beautiful.  I learned to ride on a 1978 CB750K in that exact color and pinstriping.  I bought this one to try to recreate it and to see one like I remember in your thread was pretty inspiring!  Beautiful bike and great documentation for everyone to see the evolution.  Thanks for sharing it.

Welcome aboard Nick and Thanks, good Luck with yours.

Offline HondaMan

  • Someone took this pic of me before I became a
  • Really Old Timer ...
  • *******
  • Posts: 13,676
  • ...not my choice, I was nicknamed...
    • Getting 'em Back on the Road
Re: My K8 re-conditioning
« Reply #372 on: July 03, 2023, 11:46:08 am »
Nice work!
The oil hose leaking at the tank is VERY common on the 750K7/8 bikes (and F2/3). It seems to be related to the extra kink angle of the smaller oil tank where the hose must bend a bit to make its trip to the engine. When the rubber gets aged, it cracks at the crimp fitting, then weeps down the braided cover to drip off the engine-side fitting. While the F0/1 does it, too, it is slightly less of an angle in that frame, so it takes longer for the hose to crack, or it occurs after the oil tank gets removed and reinstalled (usually for engine R&R).
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: www.SOHC4shop.com

Offline MauiK3

  • A K3 is saved
  • Old Timer
  • ******
  • Posts: 4,207
  • Old guy
Re: My K8 re-conditioning
« Reply #373 on: July 03, 2023, 02:37:26 pm »
Really nice bike!
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline scubanerdnick

  • Full Member
  • *
  • Posts: 71
Re: My K8 re-conditioning
« Reply #374 on: July 03, 2023, 06:25:18 pm »
I just bought a 1978 myself and really enjoyed reading through this entire thread!  I learned a ton from reading all the comments and your bike looks beautiful.  I learned to ride on a 1978 CB750K in that exact color and pinstriping.  I bought this one to try to recreate it and to see one like I remember in your thread was pretty inspiring!  Beautiful bike and great documentation for everyone to see the evolution.  Thanks for sharing it.
Welcome aboard Nick
Are you going to start your own project thread on your bike?
Also, go to the new members introduction section and introduce yourself and your bike. Pictures are always welcome.

I took you up and headed over to new members and introduced myself.  Should have done that right away but I was in the zone. 

Initially I had no plans to do any kind of photoblog like this but you all have inspired me, especially those of you who helped me diagnose and work through my brake light issue today.  I will say the whole thing is pretty intimidating.  I know how to turn a wrench and generally how things should look, but how to get them there is a whole different thing.  But I think I am going to document it so I can maybe help someone else who knows just enough to get themselves in trouble (like me).  Besides this is supposed to be my retirement thing, might as well get started on it early and enjoy riding it when I retire!