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WWW.CB750C.COM :: View topic - New Member - Possible 1980 CB900 Owner

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B52bombardier1
This Just In
This Just In



Joined: Jan 13, 2017
Posts: 5
Location: Bossier City, Louisiana

PostPosted: Sat Jan 14, 2017 7:44 am Reply with quote Back to top

Hello,

I'm considering the purchase of a 1980 CB900 for $150 - no title. It is missing the side covers and the handlebar switch gear. Motor is not locked up. All for $150. Should I nab it or look for something else? I see a lot of stuff available on Ebay for it.

The bike was originally sidelined because it would die shortly after completing engine warm up but ran OK prior to that. The current possessor of the bike thinks its an electrical / electronic problem but of course, it could be something simple - needs a valve adjustment or the fuel tank is trapping a vacuum -- no fuel to the carbs.

The bike had begun some kind of conversion and is missing some portion of seat frame though I'm told the original seat still mounts properly. I have not seen the bike yet so a lot of this is conjecture. It also has a different model fuel tank though you can't tell from the picture.

The bike has electronic ignition. Does anybody make replacement parts? I'm assuming its a CDI ignition bike?????

Many thanks,

Rick
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1971 School Bus Yellow Aermacchi H-D Sprint 350
1972 Candy Jet Green Honda CB500
1972 Candy Yellow Honda CL100
1973 Mighty Green Honda ST90
1974 Mars Orange Honda CT90
1975 Topaz Orange Honda ST90
1976 Shiny Orange Honda CT

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SeldomHome
On a roll
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Joined: Sep 19, 2012
Posts: 224
Location: Mississippi Mills, ON

PostPosted: Sat Jan 14, 2017 9:45 am Reply with quote Back to top

The mo$t you could lo$e is 150$ (plu$ what you $pend on diagnos$ing/correcting the problem$) Wink

It looks like from your collection you have some experience with motorcycles so if you want something to keep you busy why not go for it?

Can you get a title for it if you want one?

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1982 CB750 Custom
2001 GL1800A

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Now you're talking
Now you're talking



Joined: Oct 05, 2016
Posts: 65
Location: Kitchener, Ontario, Canada

PostPosted: Sat Jan 14, 2017 11:43 am Reply with quote Back to top

Even if getting a title in Louisiana is a major PITA, $150 is a great price for a parts bike. For $150, you can't go wrong!

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79 CB750F
81 CB750C
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B52bombardier1
This Just In
This Just In



Joined: Jan 13, 2017
Posts: 5
Location: Bossier City, Louisiana

PostPosted: Sat Jan 14, 2017 4:28 pm Reply with quote Back to top

I have had very good success with the Vermont Method of getting titles here in Louisiana. I still need to run the VIN for theft.

He also has a CB650 with no title for another $150 but it has already begun the transformation to being a hardtail. I'm much less attracted to it.

Rick

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Duke
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Joined: Sep 27, 2009
Posts: 13088
Location: ABQ, NM, USA

PostPosted: Sat Jan 14, 2017 5:20 pm Reply with quote Back to top

It is probably a good deal. I hate the fact that the frame was hacked.

You can always post in the wanted section here if you decide to buy the bike. eBay is a good source for parts but a lot of members here have parts too and might be more trustworthy and responsive to questions you might have.

No fuel to the carbs could be a dirty in tank filter or air bubbles in the line holding back fuel and maybe a bad or clogged vent in the cap.

Check out the Procom link and SeanG's new to you guide in my sig.

Also..............

Welcome here and enjoy the site

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Duke

1981 CB900 Custom

New Members Thread. Learn how to use the search engine, post proper sized pictures and get answers to very common questions that have been asked numerous times: Click Here

Find the FSM (factory service manual) and other tech docs here: Click Here

Have problems with your charging system?: Click Here

SeanG´s new to you bike Checklist (make your 30+ year old bike tip top before you ride it): Click Here

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Find out what Petcock fits your tank!! Just because you have a 1981 bike doesn't always mean it has a 1981 tank: Click Here

Buy Procom Ignitors directly from Procom´s website: Click Here

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B52bombardier1
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Joined: Jan 13, 2017
Posts: 5
Location: Bossier City, Louisiana

PostPosted: Sun Jan 15, 2017 8:57 pm Reply with quote Back to top

Hello,

One cylinder was full of water. The rear fender is missing along with the speedometer cluster and some kind of front fairing. Those really expensive rear air shocks are also gone but there is something in their place.

None of this appears to be hideously expensive to replace though. I will go look at it hopefully next weekend. Maybe it'll still be there.

Rick

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Duke
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Joined: Sep 27, 2009
Posts: 13088
Location: ABQ, NM, USA

PostPosted: Sun Jan 15, 2017 9:02 pm Reply with quote Back to top

The cylinder is a concern but everything else is not so bad. It can be done.

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Duke

1981 CB900 Custom

New Members Thread. Learn how to use the search engine, post proper sized pictures and get answers to very common questions that have been asked numerous times: Click Here

Find the FSM (factory service manual) and other tech docs here: Click Here

Have problems with your charging system?: Click Here

SeanG´s new to you bike Checklist (make your 30+ year old bike tip top before you ride it): Click Here

SeanG´s Excellent Carb Manual And Rebuild Guide: Click Here

Find out what Petcock fits your tank!! Just because you have a 1981 bike doesn't always mean it has a 1981 tank: Click Here

Buy Procom Ignitors directly from Procom´s website: Click Here

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pd750
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Joined: Aug 01, 2007
Posts: 23195
Location: Queen Creek , Arizona

PostPosted: Mon Jan 16, 2017 8:44 am Reply with quote Back to top

B52bombardier1 wrote:
Hello,

One cylinder was full of water. The rear fender is missing along with the speedometer cluster and some kind of front fairing. Those really expensive rear air shocks are also gone but there is something in their place.

None of this appears to be hideously expensive to replace though. I will go look at it hopefully next weekend. Maybe it'll still be there.

Rick


I wouldn't be surprised if you spent more than a thousand dollars getting that bike on the road and not exactly the way you want it .

But , if that's what you're looking for ...

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sunshine New members , Please read and understand :

Please put the year and model of your bike in the signature section on your profile page and set "Always attach signature " to YES .
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New Members Read This Thread :
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&p=98405#98405

Picture Posting :
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=11546

Checklist :
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&p=68384
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Whozaa
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Joined: May 09, 2010
Posts: 5699
Location: St Louis, Missouri USA

PostPosted: Mon Jan 16, 2017 9:36 am Reply with quote Back to top

I was with you until you said, "water in a cylinder". At that point, you might be looking at some severe motor work. And these big fours are lot more expensive to tear down and rebuild than the single thumpers you list in your signature. Look at the price of a head gasket for an idea of the difference in cost.

I'm not trying to disparage your collection by the way. I have a 68 CT90 and love it! I just want to make sure you know what you're in for. It's a completely different game when you get to the big motors.

Can you show us any pictures of the CB900?

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79 CB750F
68 CT90

Hey new guy! Please read the New Members Thread behind this link. http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=7149
It contains the rules for forum posting and other valuable info you need to know.
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B52bombardier1
This Just In
This Just In



Joined: Jan 13, 2017
Posts: 5
Location: Bossier City, Louisiana

PostPosted: Mon Jan 16, 2017 8:16 pm Reply with quote Back to top

Hello,

It's a Craigs List post - one picture only. Yes, I'm a bit discouraged about the cylinder.

https://texarkana.craigslist.org/mcy/5955556795.html

Rick

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grepper
Now you're talking
Now you're talking



Joined: Aug 20, 2015
Posts: 61
Location: Lowell MI

PostPosted: Tue Jan 17, 2017 9:08 am Reply with quote Back to top

Looks like a Parts bike to me. Looks like it's missing the carbs too and with water in the cylinder, that engine probably needs to be rebuilt. If you're set on getting a CB900, buy this one and an other with the parts you need, combine and build a running bike, financing the build by selling off the extras. I'm doing that now with a cb750 and did that with my last build.

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2001 Honda Valkyrie
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B52bombardier1
This Just In
This Just In



Joined: Jan 13, 2017
Posts: 5
Location: Bossier City, Louisiana

PostPosted: Tue Jan 17, 2017 8:36 pm Reply with quote Back to top

Hello Grepper,

Your vision is perfect. He sent me additional pictures today and indeed, the carbs are gone.

This bike will not be following me home.

Rick

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genesound
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Joined: Jul 24, 2007
Posts: 41233
Location: Studio City, CA

PostPosted: Tue Jan 17, 2017 8:42 pm Reply with quote Back to top

Water in the cylinder probably means water in the crankcase. I'd pass.

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NMT - New Member's Thread, a Must Read, click here!!! - Information For New and Veteran Members.
Contains SITE RULES, how to enter required bike information in your signature, thread and picture posting...
Also some important DOHC wrenching tips, and some other information.
Kindly read this linked thread with the rules before posting
pictures or asking lots of questions that are already answered in it.

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Whozaa
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Joined: May 09, 2010
Posts: 5699
Location: St Louis, Missouri USA

PostPosted: Wed Jan 18, 2017 9:38 am Reply with quote Back to top

Yeah, even as a parts bike it's pretty poor. Water in the motor means you might not be able to use any of its internals. The original tank is gone, original exhaust is gone, carbs are gone, rear frame is altered, head light gone, side covers gone.

Basically all that's left is a non-titled rolling chassis.

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79 CB750F
68 CT90

Hey new guy! Please read the New Members Thread behind this link. http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=7149
It contains the rules for forum posting and other valuable info you need to know.
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holysmokes
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Joined: Jul 25, 2007
Posts: 35633
Location: ridge road springfield nova scotia

PostPosted: Mon Jan 23, 2017 7:54 am Reply with quote Back to top

You'll spend a grand on any old bike

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link to manuals + tech threads>
http://www.cb750c.com/modules.php?name=Forums&file=viewforum&f=5
valve adjust thread>
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=12173&highlight=shim
check charging video
https://www.youtube.com/watch?v=YvRe9g_2gyM
carb cleaning thread>
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verifying ground
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checking stator
https://www.youtube.com/watch?v=5v2LtHlvcqI
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checking rotor ohms thread>
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=1477&highlight=ohms
torque values thread >
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&p=81382#81382

http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=52
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