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Author Topic: "Poor Kid" 1981 CB750K - first build  (Read 29320 times)

Offline canyoncarver

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Re: "Poor Kid" 1981 CB750K - first build
« Reply #50 on: Jun 13, 2013, 14:54:05 »

There is some great news. I'm picking up another bike tomorrow for certain. A clean titled 1981 CX500C... and when I get it, I'll have two 81 Hondas in the garage. People are telling me not to buy another before the first is finished, but if you knew how cheap it was you'd get it too.


HA......wish I'd heard that one a few bikes ago....
--

YZF750/1000R The Fly
KZ 750 Twin
ZRX 1100
KZ400 The Rabbit
KLR650, 65 Norton, my never finished shovelhead chopper, an 86' FXR, and an F9 Bighorn
more YZF750R's, more KZ's, a Zephyr750...and the ever unfinished 75' CB550 cafe.
--

Offline Maritime

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Re: "Poor Kid" 1981 CB750K - first build
« Reply #51 on: Jun 13, 2013, 15:28:04 »
Good get, always good to have one waiting for when the first is finished ;D  the CX's are easy to work on, valves are a breeze, carbs come out super fast etc.  You started with the harder bike having 4 of everything, the CX is half the work LOL.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline kraptastic k

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Re: "Poor Kid" 1981 CB750K - first build
« Reply #52 on: Jun 13, 2013, 15:34:23 »
I've heard the CX will be ultra reliable and it will be a favorable commute bike, in comparison to the highway-sprint style of my CB. I sure wish I knew! Either way, I'm sitting in my living room, waiting to go get it. Two isn't too many.



Offline kraptastic k

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Re: "Poor Kid" 1981 CB750K - first build
« Reply #53 on: Jun 13, 2013, 23:08:24 »
Uh oh... Look what I found.

1981 CB750K
And
1981 CX500C


Offline McBrenner

  • Posts: 40
Re: "Poor Kid" 1981 CB750K - first build
« Reply #54 on: Jun 13, 2013, 23:46:17 »
Now that is a great starting point on a CX. I wish mine was half as clean as that at the get go. Good luck to you on it. Any directions you are going to go with it after the CB?
'81 Honda CX 500D

Offline kraptastic k

  • Posts: 222
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Re: "Poor Kid" 1981 CB750K - first build
« Reply #55 on: Jun 13, 2013, 23:50:38 »
Thanks! Everybody sees the crazy good deals on bikes... Thought my turn would never come, but now I have a solid platform for build #2.

Yes, I'm very excited to build another purpose driven bike. Since the CB is my highway sprint bike/tuner, I would like to make a reliable commuter bike that can hop curbs and dodge down shoulders. Probably some MX bars and very few other mods.

I'll post a link to the build thread and tell the story better.

1981 CB750K (getting there now)


Offline pr design

  • Posts: 257
Re: "Poor Kid" 1981 CB750K - first build
« Reply #56 on: Jun 14, 2013, 11:42:30 »
I'm pretty sure I saw that one on my craigslist the other day
Are you in the Triad?

Offline McBrenner

  • Posts: 40
Re: "Poor Kid" 1981 CB750K - first build
« Reply #57 on: Jun 14, 2013, 11:56:33 »
Heck yeah man, exactly what I'm building my cx for. A solid runner for around town, backroads, but still able to do a 300 mile trip to college without worry
'81 Honda CX 500D

Offline kraptastic k

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Re: "Poor Kid" 1981 CB750K - first build
« Reply #58 on: Jun 14, 2013, 12:48:49 »
McBrenner, that's spot on. Something that I won't be frustrated on in traffic. Or something that gets me out of said traffic.

No, I don't think this bike was listed... Snagged it from a shop in Corinth, TX. Bitch of a drive

1981 CB750K (getting there now)


Offline kraptastic k

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Re: "Poor Kid" 1981 CB750K - first build
« Reply #59 on: Jun 18, 2013, 00:49:08 »
I ordered two bunk ass petcocks and I'm thoroughly disappointed with both of them not fitting.

Some haphazard fabrication also ended up with the worst brake light I've ever seen. It will have to do for now.

Brass pipe fittings and a bit of improv have left me with a true rat setup. The new starter relay is also bunk I think- I had to jump it with a screwdriver.

The idle is extremely high now with consistent fuel flow. Backfiring occurring every 15 sec, but I won't let it run like that for intervals of more than 8 sec. Cyl #1 & 4 seem normal. 3 is cold and 2 is very very hot, assumed lean. Adjustment of the idle mixture screw did not appear to help.

Theories: vacuum leak at the boot. Can a bad seal at the exhaust header cause a lean or high idle condition?

Pilot fuel system could have clogged in carb 4, aka cyl 2?

No spark at cyl 3?

The issue with fuel spilling from the air filters is eliminated. No problems exist beside the faulty starter, the still-leaking case cover, and the above conditions.

Please advise.

1981 CB750K (headscratcher)
1981 CX500C (back burner)