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Author Topic: Finally rebuilding my CB 750  (Read 14000 times)

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Offline seanbarney41

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Re: Finally rebuilding my old CB 750
« Reply #75 on: January 20, 2022, 05:05:41 PM »
Sour apple!
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If it works good, it looks good...

Offline Sam Green Racing

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Re: Finally rebuilding my old CB 750
« Reply #76 on: February 06, 2022, 05:07:18 AM »
Quote from: Leino on January 20, 2022, 07:35:42 AM
I got a little sneak peek from the painter  ;)



I like GREEN, lol.
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C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
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RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

Offline PeWe

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Re: Finally rebuilding my old CB 750
« Reply #77 on: February 06, 2022, 06:40:30 AM »
The covers look tasty! ;D
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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 Leino

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Re: Finally rebuilding my old CB 750
« Reply #78 on: February 08, 2022, 09:50:54 AM »


Locally ported many many years ago. Mike, feel free to tell this is useless  ;D
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Offline Leino

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Re: Finally rebuilding my old CB 750
« Reply #79 on: February 08, 2022, 09:56:56 AM »
Quote from: PeWe on February 06, 2022, 06:40:30 AM
The covers look tasty! ;D
Thanks Per! It's candy green, I'll take some pics in sunshine, the color really comes alive then.
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Offline Leino

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Re: Finally rebuilding my old CB 750
« Reply #80 on: February 08, 2022, 09:59:36 AM »
Quote from: Sam Green Racing on February 06, 2022, 05:07:18 AM
Quote from: Leino on January 20, 2022, 07:35:42 AM
I got a little sneak peek from the painter  ;)



I like GREEN, lol.
I wonder why  ;D
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Offline Leino

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Re: Finally rebuilding my old CB 750
« Reply #81 on: February 08, 2022, 10:02:07 AM »
Quote from: seanbarney41 on January 20, 2022, 05:05:41 PM
Sour apple!
;D
My bikes have been black for as long as I can remember so it was time to try something different.
Ok, ok, the Tiller is white/blue/ some other blue/black but before I bought it all my bikes were black  ::)
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Offline Leino

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Re: Finally rebuilding my old CB 750
« Reply #82 on: February 14, 2022, 02:40:19 AM »


It's been a while since I last put one of these together  ;D
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Offline MRieck

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Re: Finally rebuilding my old CB 750
« Reply #83 on: February 14, 2022, 06:22:46 AM »
They are a pretty simple engine for sure.
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Offline Leino

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Re: Finally rebuilding my old CB 750
« Reply #84 on: February 14, 2022, 09:55:31 AM »
Quote from: MRieck on February 14, 2022, 06:22:46 AM
They are a pretty simple engine for sure.
Oh yes, hardest part is to find all the parts  ;D
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Offline PeWe

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Re: Finally rebuilding my old CB 750
« Reply #85 on: February 14, 2022, 11:39:08 AM »
Take photos of each step is something I do to make sure afterwards when I'll get 2nd thoughts.
Like: The washer behind the primary hub in front of that bearing was there? Correct washers in clutch, correctly flipped... Or all o-rings in place or....?

I have taken apart things  just assembled to check too often.
I need a check list to check when the assembly auto pilot kicks in  ;)

Easy to miss when building with stray parts, not a complete working recently taken apart.
CMSNL charts and shop manual are nice readings.

I had extra parts on the bench I found afterwards that made me to worry that I had missed them in the recent assembly.
;D
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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 MRieck

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Re: Finally rebuilding my old CB 750
« Reply #86 on: February 14, 2022, 12:00:28 PM »
Quote from: Leino on February 08, 2022, 09:50:54 AM


Locally ported many many years ago. Mike, feel free to tell this is useless  ;D
That will work Juha....the basic shape is OK
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Offline Leino

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Re: Finally rebuilding my old CB 750
« Reply #87 on: February 14, 2022, 10:57:33 PM »
Quote from: PeWe on February 14, 2022, 11:39:08 AM
Take photos of each step is something I do to make sure afterwards when I'll get 2nd thoughts.
Like: The washer behind the primary hub in front of that bearing was there? Correct washers in clutch, correctly flipped... Or all o-rings in place or....?

I have taken apart things  just assembled to check too often.
I need a check list to check when the assembly auto pilot kicks in  ;)

Easy to miss when building with stray parts, not a complete working recently taken apart.
CMSNL charts and shop manual are nice readings.

I had extra parts on the bench I found afterwards that made me to worry that I had missed them in the recent assembly.
;D
Yes, familiar with the tricks but really the biggest issue has been finding where all the stuff is in the 100m2 shop with four cars, around 14-15(could as well be 12, not all mine) motorcycles and quite a load of parts and all this has been moved to a different location four or five times while the CB engine has been apart ;D
« Last Edit: February 14, 2022, 11:22:53 PM by Leino »
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Offline Leino

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Re: Finally rebuilding my old CB 750
« Reply #88 on: February 14, 2022, 10:59:19 PM »
Quote from: MRieck on February 14, 2022, 12:00:28 PM
Quote from: Leino on February 08, 2022, 09:50:54 AM


Locally ported many many years ago. Mike, feel free to tell this is useless  ;D
That will work Juha....the basic shape is OK
Ok, thanks Mike. I'll ask you to port a head for the next one I'm planning.
« Last Edit: February 14, 2022, 11:06:27 PM by Leino »
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Offline Leino

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Re: Finally rebuilding my old CB 750
« Reply #89 on: April 04, 2022, 06:21:22 AM »
Does anybody here have experience on Giuliari replica seats that are available nowadays? I found some for sale in Germany and some in Italy and was curious how well they fit? Don't want to spend hundreds of Euro's on sh1tty parts.

Tiller is ready to ride and Aermacchi is ready for classic racing so I have time to work on the CB now  ;D

 
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Offline Stev-o

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Re: Finally rebuilding my old CB 750
« Reply #90 on: April 04, 2022, 12:08:09 PM »
Quote from: Leino on April 04, 2022, 06:21:22 AM
Does anybody here have experience on Giuliari replica seats that are available nowadays?

No, but have you seen this one for sale?

http://forums.sohc4.net/index.php/topic,188896.0.html
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Leino

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Re: Finally rebuilding my old CB 750
« Reply #91 on: October 07, 2022, 07:13:57 AM »
These puppies arrived today.

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Offline Leino

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Re: Finally rebuilding my CB 750
« Reply #92 on: January 12, 2023, 04:19:12 AM »
New aluminum fenders. They are very light.


On my way to my friends shop... using the Opel as transportation naturally.








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Offline newday777

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Re: Finally rebuilding my CB 750
« Reply #93 on: January 12, 2023, 06:29:40 AM »
I just reread this build. Very interesting.....
The stance of the rolling frame looks good. Does it sit a little taller than the stock 750 height clearance?
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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 Leino

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Re: Finally rebuilding my CB 750
« Reply #94 on: January 12, 2023, 07:47:32 AM »
Quote from: newday777 on January 12, 2023, 06:29:40 AM
I just reread this build. Very interesting.....
The stance of the rolling frame looks good. Does it sit a little taller than the stock 750 height clearance?
Thanks! I think it is slightly higher but the 17" wheels also make it look like that. Rear fender is about an inch higher than stock so that might be part of the illusion.
I measured rake and trail and it's around 27 degrees and about 4 inches of trail. I can play around with the figures a bit with the chain tensioners and adjustable length shocks I'll be using.
Racetech gold valves arrived a couple of days ago so it's time to pull the front end and do some work on that next.
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Offline newday777

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Re: Finally rebuilding my CB 750
« Reply #95 on: January 12, 2023, 08:03:53 AM »
If you get a chance would you post the frame ground clearance?
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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 Leino

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Re: Finally rebuilding my CB 750
« Reply #96 on: January 12, 2023, 08:59:37 AM »
Quote from: newday777 on January 12, 2023, 08:03:53 AM
If you get a chance would you post the frame ground clearance?
Sure. I'll measure it tomorrow.
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Offline Leino

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Re: Finally rebuilding my CB 750
« Reply #97 on: January 12, 2023, 11:46:47 PM »
Quote from: newday777 on January 12, 2023, 08:03:53 AM
If you get a chance would you post the frame ground clearance?
212 mm or 8.35 inches in the picture.
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Offline Leino

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Re: Finally rebuilding my CB 750
« Reply #98 on: February 03, 2023, 08:21:28 AM »
I found a Giuliari seat in need of some work from Germany and bought it. I know this lady who does miracles with seats and furniture etc. so she can make it look nice and something that suits the candy green.

Mike said he has my gaskets waiting and they are on their way to me pretty soon so I can start putting the engine back together.
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Offline Leino

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Re: Finally rebuilding my CB 750
« Reply #99 on: February 18, 2023, 10:38:53 AM »
Got the gaskets, thanks Mike!

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