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Author Topic: 1974 CB750 - cafe/restoration  (Read 2812 times)

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Offline Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #25 on: November 21, 2023, 06:32:13 PM »
Decided to try and make an electronics tray to go under the seat. Not bad for my first time making something out of sheet metal. Turned out pretty decent and fits nicely so I’m happy with it.

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Offline BenelliSEI

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Re: 1974 CB750 - cafe/restoration
« Reply #26 on: November 21, 2023, 06:35:52 PM »
Nice work, it’s all in the layout!
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Offline Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #27 on: November 21, 2023, 07:30:29 PM »
Quote from: BenelliSEI on November 21, 2023, 06:35:52 PM
Nice work, it’s all in the layout!
Thank you!


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Offline RAFster122s

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Re: 1974 CB750 - cafe/restoration
« Reply #28 on: November 21, 2023, 10:05:29 PM »
Unless welded, there should be a gap between the vertical edges so you don't have vibration caused noise or wear issues, unless you are securing it to all the frame tubes. (Don't weld galvanized steel !!)

David
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Offline SOHC4 Cafe Racer Fan

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Re: 1974 CB750 - cafe/restoration
« Reply #29 on: November 22, 2023, 05:19:27 PM »
Nice fitment.
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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 BigAl

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Re: 1974 CB750 - cafe/restoration
« Reply #30 on: November 22, 2023, 05:25:54 PM »
Jcop.550, that looks great, well done!
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1978 CB550K4

Offline Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #31 on: November 24, 2023, 11:22:24 AM »
Frame painted, cb550 swingarm, front end all finished and installed, starting to look like a bike again! Not sure how I feel about the shocks. They were cheap ones to get it rolling once I get wheels so I may swap them out.









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Offline SOHC4 Cafe Racer Fan

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Re: 1974 CB750 - cafe/restoration
« Reply #32 on: December 03, 2023, 07:14:36 PM »
Looks nice.  I would swap the shocks at some point. Not that you need Ohlins, but something better (Progressive, IKON, Racetech). You may find out that those cheapies have fake reservoirs. 
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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 Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #33 on: December 04, 2023, 06:26:12 AM »
Quote from: SOHC4 Cafe Racer Fan on December 03, 2023, 07:14:36 PM
Looks nice.  I would swap the shocks at some point. Not that you need Ohlins, but something better (Progressive, IKON, Racetech). You may find out that those cheapies have fake reservoirs.
Yes, definitely will be doing that. I just had these to throw on to get it together. Eventually I’ll get something nicer when I’m ready to spend the money. This build is getting expensive quick!


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Offline Floshenbarnical

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Re: 1974 CB750 - cafe/restoration
« Reply #34 on: December 06, 2023, 03:45:01 PM »
I've been eyeing up some Ikons but it looks like all their shocks have progressive coils, which a couple old heads on here suggested isn't ideal for rear suspension.
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"All things change in a dynamic environment. Your effort to remain what you are is what limits you."

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Offline Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #35 on: December 06, 2023, 04:22:18 PM »
Put in some work on these carbs the past couple of days to get them freshened up.

Before:




After:





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Offline newday777

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Re: 1974 CB750 - cafe/restoration
« Reply #36 on: December 06, 2023, 07:05:32 PM »
Quote from: Floshenbarnical on December 06, 2023, 03:45:01 PM
I've been eyeing up some Ikons but it looks like all their shocks have progressive coils, which a couple old heads on here suggested isn't ideal for rear suspension.
I think you can specify what springs you want if you ask.
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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 newday777

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Re: 1974 CB750 - cafe/restoration
« Reply #37 on: December 06, 2023, 07:07:47 PM »
How did you clean them up?
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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 Jcop.550

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1974 CB750 - cafe/restoration
« Reply #38 on: December 06, 2023, 08:17:27 PM »
Quote from: newday777 on December 06, 2023, 07:07:47 PM
How did you clean them up?
Boiled them in water with lemon juice for 20 mins. Took them out and did a quick clean with a wire brush bit on a dremel. Then boiled again for another 20 mins then did a thorough cleaning with the dremel again and it shines the bodies up.

Wet sanded the tops and bowls starting at 100 grit going all the way to 1500 grit. Buff and polish. I could do a little better on that but my hands/fingers were raw after all that sanding…. Labor of love


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« Last Edit: December 06, 2023, 08:30:35 PM by Jcop.550 »
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Offline newday777

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Re: 1974 CB750 - cafe/restoration
« Reply #39 on: December 07, 2023, 04:08:49 AM »
Quote from: Jcop.550 on December 06, 2023, 08:17:27 PM
Quote from: newday777 on December 06, 2023, 07:07:47 PM
How did you clean them up?
Boiled them in water with lemon juice for 20 mins. Took them out and did a quick clean with a wire brush bit on a dremel. Then boiled again for another 20 mins then did a thorough cleaning with the dremel again and it shines the bodies up.

Wet sanded the tops and bowls starting at 100 grit going all the way to 1500 grit. Buff and polish. I could do a little better on that but my hands/fingers were raw after all that sanding…. Labor of love


Sent from my iPhone using Tapatalk
They turned out good. Nice job on them.
How's the inside?
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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 Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #40 on: December 07, 2023, 07:43:53 AM »
Quote from: newday777 on December 07, 2023, 04:08:49 AM
Quote from: Jcop.550 on December 06, 2023, 08:17:27 PM
Quote from: newday777 on December 06, 2023, 07:07:47 PM
How did you clean them up?
Boiled them in water with lemon juice for 20 mins. Took them out and did a quick clean with a wire brush bit on a dremel. Then boiled again for another 20 mins then did a thorough cleaning with the dremel again and it shines the bodies up.

Wet sanded the tops and bowls starting at 100 grit going all the way to 1500 grit. Buff and polish. I could do a little better on that but my hands/fingers were raw after all that sanding…. Labor of love


Sent from my iPhone using Tapatalk
They turned out good. Nice job on them.
How's the inside?
Thanks! Inside is all cleaned as well. Just gotta spray and blow out all the ports to get any remaining debris out.


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Offline Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #41 on: February 01, 2024, 08:13:47 AM »
Project was put on hold for 2 months as I waited for my wheels to come in. Now we’re back and ready to keep moving forward. Tossed the wheels on real quick to see what it will look like and I’m very happy with how it’s turning out.

Correct me if I’m wrong but is the front on backwards? I followed the rotation arrow on the tire but it looks backwards. Either way, if it’s incorrect it will be coming off to get the rotors on this weekend.

Waiting on some more parts (front rotors, rear sprockets) but in the meantime, the engine will be going in within the next week or so.






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Offline calj737

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Re: 1974 CB750 - cafe/restoration
« Reply #42 on: February 01, 2024, 09:45:26 AM »
Front forks are backwards for sure. Calipers mount to the rear of the disc. Lots of front tires are not directional.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #43 on: February 01, 2024, 11:54:09 AM »
Quote from: calj737 on February 01, 2024, 09:45:26 AM
Front forks are backwards for sure. Calipers mount to the rear of the disc. Lots of front tires are not directional.
Oh shoot! Thanks for catching that. I just mounted them the same way they came in the mail. Appreciate the help!


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Offline Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #44 on: March 04, 2024, 04:02:57 PM »
A lot of progress has been made over the past month with little updates to the thread! I have been busy and taking pictures along the way so here it goes starting with the engine going in and exhaust fitted. Also got a new camera I’ve been messing around with taking some nice high quality photos throughout the progress.





Next up, carbs finished up and installed. Rebuilt and rejetted with uni pod filters. Also got my Cognito moto rear sets in and installed






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Offline Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #45 on: March 04, 2024, 04:12:59 PM »
Not sure how many photos I can put in one topic reply so here is part 2!

Calipers came in the mail so I spent this Saturday refinishing them. Looking like new again.





Last but not least, I got a good deal on a new Motogadget motoscope pro. Got that installed along with the push button controls, and new vintage style master cylinder/levers. I’m really trying to keep this bike looking like a “modern classic” without going way overboard on the modern. To back that statement up, I believe I mentioned the end goal for the tank. I’m in love with the ‘72 flake sunrise orange tanks like the one I have on my shelf in the background, so that is exactly what I’m going for with this tank.





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Offline Jcop.550

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1974 CB750 - cafe/restoration
« Reply #46 on: March 06, 2024, 02:36:56 PM »
Spent a few hours making this wiring diagram last night so I can easily wire my bike with a guide when it comes time for it. Now I am not a fan (or expert) at wiring at all. This will be my first time doing it by myself. I went with the m.unit to make it easier while having all the bells and whistles it comes with.

Can any of you Motogadget/wiring experts take a look at this and let me know how it looks and what needs to be tweaked? Specifically with the reg/rec to stator and the ignition and coils as I was a bit confused on that part by referencing a bunch of diagrams online to mash together for my set up.

« Last Edit: March 13, 2024, 07:30:43 AM by Jcop.550 »
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Offline SOHC4 Cafe Racer Fan

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Re: 1974 CB750 - cafe/restoration
« Reply #47 on: March 13, 2024, 06:11:12 PM »
Looking good!
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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 Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #48 on: March 14, 2024, 05:03:03 PM »
Quote from: SOHC4 Cafe Racer Fan on March 13, 2024, 06:11:12 PM
Looking good!
Thank you!


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Offline Jcop.550

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Re: 1974 CB750 - cafe/restoration
« Reply #49 on: May 16, 2024, 01:37:58 PM »
Once again, haven’t updated in a while but big progress made. Wiring is complete. Hand an oil tank and battery box made. Just have a couple little odds and ends then it’ll be time to fire it up.






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