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Author Topic: First post - 77 cb750 behind a barn find  (Read 2483 times)

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Offline Mark Wilson

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First post - 77 cb750 behind a barn find
« on: February 06, 2015, 09:18:10 AM »
While not all that seriously considering a bike or a project, I was scanning Craigslist last week and stumbled on a neglected 77. I just couldn't help myself, so did the deal, gave the man $550 and he signed the title. It's been sitting behind a barn with a tarp for a couple years and hasn't run in several more. Motor turns but rear wheel not so much. Loading and unloading was an exciting experience!

First order was to rip off the fairing. Whoever installed it used some kind of medieval weapon to butcher up the headlight bucket - Nice! I then pulled the carbs to see what lurked and was very surprised they were clean. Drained what little oil was still in the case and found it pretty goldish and clean. This weekend, I'll soak the carbs, get the back wheel turning and figure out how to jumper the ignition switch(no key). Next week if all goes well, I'll hang a temp fuel bottle and see if the old girl still has any life in her. High fun factor!
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Offline Maurice

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Re: First post - 77 cb750 behind a barn find
« Reply #1 on: February 06, 2015, 09:58:46 AM »
Wow nice find.

Rear wheel probably just has the brake stuck close. Just lightly hit the actuator on the plate, towards the back.

Good luck
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Offline calj737

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Re: First post - 77 cb750 behind a barn find
« Reply #2 on: February 06, 2015, 10:08:44 AM »
And you can jump the solenoid with power to bypass the key. Might be good to drizzle some oil in the top end, remove the plugs and drip some Marvel Mystery Oil down the chambers, and rotate the crank to lubricate the motor before "firing it up" since its been sitting,
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Offline Mark Wilson

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Re: First post - 77 cb750 behind a barn find
« Reply #3 on: February 06, 2015, 11:31:38 AM »
Great suggestions - Thanks!
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Offline rb550four

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Re: First post - 77 cb750 behind a barn find
« Reply #4 on: February 06, 2015, 02:13:21 PM »
Nice find!
  It's always better to buy a  new battery, never jump off a running car. And instead of guessing how to hotwire it, you'd be better off with a new switch even a cheap one is cheaper than messing the wiring up.You'll need one anyways. And always, always have a shop manual.
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A few Honda 500's, a few Honda 550's, a few Honda 650's, '72 cb 450, a couple 500/550/650 hybrids, and 2001 750. 
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Offline Mark Wilson

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Re: First post - 77 cb750 behind a barn find
« Reply #5 on: February 06, 2015, 05:52:00 PM »
Spark plugs showing OK and a little life after all the years of neglect.''




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Offline FridgeRaider

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Re: First post - 77 cb750 behind a barn find
« Reply #6 on: February 06, 2015, 08:20:35 PM »
I saw that listing on CL a couple weeks back and thought to myself "someone better buy that before I have another project on my hands". Congratulations on that sweet deal! What conditions are the pipes in?
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Offline Mark Wilson

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Re: First post - 77 cb750 behind a barn find
« Reply #7 on: February 07, 2015, 03:16:14 PM »
Carbs soaking in Pine-sol




Back wheel off to get brake loose



After a little clean up




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Offline Mark Wilson

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Re: First post - 77 cb750 behind a barn find
« Reply #8 on: February 07, 2015, 03:17:38 PM »
Quote from: FridgeRaider on February 06, 2015, 08:20:35 PM
I saw that listing on CL a couple weeks back and thought to myself "someone better buy that before I have another project on my hands". Congratulations on that sweet deal! What conditions are the pipes in?

Pipes are toast - chopped them off today.
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Offline Mark Wilson

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Re: First post - 77 cb750 behind a barn find
« Reply #9 on: February 10, 2015, 06:58:59 AM »
Carbs cleaned and back on. Oil changed. Trying to figure out throttle linkage now. Why didn't I take pictures???? :o
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Offline Trad

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Re: First post - 77 cb750 behind a barn find
« Reply #10 on: February 10, 2015, 10:49:37 AM »
Nice work. Glad you're bring this one back to life.
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Offline Johnie

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Re: First post - 77 cb750 behind a barn find
« Reply #11 on: February 10, 2015, 10:57:23 AM »
Nice find. Amazing it sat outside that long and she is not froze up. Nice to see you are keeping it original. Here is a pic of my new K7 when I brought it home from the dealer in 1977.
« Last Edit: February 10, 2015, 11:00:00 AM by Johnie »
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1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 Sulphur Yellow

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Offline Mark Wilson

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Re: First post - 77 cb750 behind a barn find
« Reply #12 on: February 10, 2015, 05:08:01 PM »
Carbs reinstalled. Took two nights fiddling with the throttle linkage to get it back in place. The gas tank is filled with apple cider vinegar to kill the rust. Test start this weekend!



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Offline Mark Wilson

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Re: First post - 77 cb750 behind a barn find
« Reply #13 on: February 19, 2015, 05:55:21 PM »
Success! After chasing several electrical faults she came back to life today - if only for a short time. This was on starting juice. She hasn't remembered how to pick up fuel from the bowls yet. I call it a win.



<iframe width="420" height="315" src=" frameborder="0" allowfullscreen></iframe>
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Offline kap384@telus.net

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Re: First post - 77 cb750 behind a barn find
« Reply #14 on: February 19, 2015, 06:45:20 PM »
Quote from: Mark Wilson on February 19, 2015, 05:55:21 PM
Success! After chasing several electrical faults she came back to life today - if only for a short time. This was on starting juice. She hasn't remembered how to pick up fuel from the bowls yet. I call it a win.



<iframe width="420" height="315" src="https://www.youtube.com/embed/apCyihNo1vk" frameborder="0" allowfullscreen></iframe>




Great news
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1965 Honda CB450K0
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1977 Honda CB750F2 Supersport
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Offline Mark Wilson

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Re: First post - 77 cb750 behind a barn find
« Reply #15 on: March 04, 2015, 06:24:35 AM »
After a little more tinkering, the old girl came to life. I'm actually pretty surprised that she starts as quickly with the old plugs and points.

https://www.youtube.com/
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