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Author Topic: 1978 CB750K project  (Read 1061 times)

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Offline rsanchez91

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1978 CB750K project
« on: April 10, 2016, 05:43:47 PM »
Hey everyone my name is Rich, I live north of Atlanta in Georgia, but I'm from Huntington Beach, CA.  I recently picked up a 78 750 from a guy in South Carolina who bought it from the original owner then did nothing with it.  It did start (kicked over with a battery box) and run for a few seconds, then sputters out.  Everything seems to be there and work with the exception of the front brakes. The master sight glass is broken and the caliper was seized. 

I payed $600 for it.

My plan is to make it run, then make it ride, then make it mine.

Any advice or tips is welcome, I've ridden motorcycles all my life but this is my first CB.

Here's some CB porn for you all.


















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Offline rocket johnny

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Re: 1978 CB750K project
« Reply #1 on: April 11, 2016, 08:03:18 AM »
nice bike and a good deal !       rocket johnny
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Offline SOHC4 Cafe Racer Fan

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Re: 1978 CB750K project
« Reply #2 on: April 11, 2016, 09:06:54 AM »
Download the service manual from the site, print it out and put it in a 3-ring binder handy in your garage.  Your bike would likely benefit from the 3,000 mile service. 

Also get yourself a electric multimeter to check your wiring for shorts, corrosion and proper charging.  If you don't have one already, buy an impact driver (for use with a hammer) -- great for removing engine screws, etc. -- and a set of JIS screwdrivers (the screws on your motor are NOT Phillips head but JIS and they will easily strip with a Phillips head driver.
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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
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"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)

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1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
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Offline SKTP

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Re: 1978 CB750K project
« Reply #3 on: April 11, 2016, 11:17:04 AM »
Check out my thread...this is some serious deja-vu...only took me 5+ years so far!
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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 Ericcb750

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Re: 1978 CB750K project
« Reply #4 on: April 12, 2016, 06:16:32 AM »
Looks like a great start! And still has the original pipes!!! I was lucky enough that my 78K had the original pipes too in great condition. My 78k was my first SOHC and I absolutely love that bike, was the first one I really got my hands dirty on.

Member SKTP's 78 is freakin amazing, I would definitely check out his thread. Mine is not quite that nice but I did do a complete Frame off resto, powder coated frame, swingarm, trees, stands, brackets, etc. Rebuilt top end of motor, new gauge faces, etc.

If you have any questions at all, please do not hesitate to ask... You are in the right place though, Everyone on this forum is the best by far when it comes to helping a rookie out. I've learned multiple lifetime's of info from the guys on this forum in just a couple short years. Just take your time and make sure to do your research. Best of luck, You'll have a great time. Sounds like you know your way around bikes but if I can help at all, let me know.

Take it easy.
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1978 CB750K
1978 CB750F super sport
2005 Sportster 1208

Offline Restoration Fan

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Re: 1978 CB750K project
« Reply #5 on: April 12, 2016, 12:09:22 PM »
Awesome find.
I live in Woodstock, GA and have a 78K that my son & I restored.  So if you ever find yourself needing a hand, give me a shout. 

One of these days, I'm actually going to get a break from work and get some time to get out on mine and ride a bit.

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 rsanchez91

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Re: 1978 CB750K project
« Reply #6 on: April 12, 2016, 03:33:36 PM »

Small world, I was going to buy the cb350f that's forsale in woodstock.  Today I pulled the carbs off.  First off they were just sitting in place, no wonder it didn't run well.  Then I took 1 bowl off to see what I'm getting into.  Pics below. 

Also, what carb rebuild kit do you recommend for a 78?  I'd be okay with just seals







Quote from: Restoration Fan on April 12, 2016, 12:09:22 PM
Awesome find.
I live in Woodstock, GA and have a 78K that my son & I restored.  So if you ever find yourself needing a hand, give me a shout. 

One of these days, I'm actually going to get a break from work and get some time to get out on mine and ride a bit.

Ron
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