Honda DOHC Custom 750/900/1000
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1979 to 1983 DOHC CB750/900/1000/1100 Honda Custom: Forums

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DotTheIs
This Just In
This Just In



Joined: Oct 01, 2017
Posts: 7
Location: UK

PostPosted: Sun Oct 01, 2017 8:18 pm Reply with quote Back to top

Just a quick message to introduce myself. I've bought a Japanese manufactured, US registered Honda CB750C with a view to making a rat/café look bike with it.

The previous owner bought it direct from the company that imported it into the UK and he didn't do any work on it but spent quite a lot of money accumulating bits for it, some of which I will use... some like the horrible plastic headlamp cowl I will not.

Work done so far...

Stripped and rebuilt carbs... but will need a new float as I bust one...

Cut off offending rear metalwork for passengers and ground smooth and removed all the side panel lugs and smoothed.

Partially cut rear frame arms and reshaped them so that they meet and welded them shut. Polished up nicely too. The two holes I will use to mount number plate/rear light.

The bike had fallen at some point so the stops on the frame and triple tree were bust on the right hand side. I've re welded the frame part and managed to drill through the cast steel triple tree stop at the back parallel to the break with a 10mm drill and filled this up with a nice load of weld as welding around the outside would have made it very difficult to finish nicely as it's not possible to get a grinder into it easily.

Bought new original second hand clocks and clock mounts as these had been butchered.

done a bit of a dry run reassembly mostly cos the bike is in France with me at the moment but since I want to bring it back to the UK I thought it would be easier in one piece more or less.

Bits I know I'm missing and going to need are a new chain guard, fuel tank, clutch lever and headlamp...

I want to weld a close fitting mudguard onto the swing arm but don't know what might be the best option for this... scavenged or fabricated....

There's probably loads more stuff but my memory ain't what I remember it was...

_________________
1981 Honda CB750C Custom Rat/Cafe Project


Last edited by DotTheIs on Sun Oct 01, 2017 8:29 pm; edited 3 times in total
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DotTheIs
This Just In
This Just In



Joined: Oct 01, 2017
Posts: 7
Location: UK

PostPosted: Sun Oct 01, 2017 8:23 pm Reply with quote Back to top

Incidentally I have genuine Honda 750Ca CB750Cb parts catalogue in English, French and German... If I get enough interest and no-one's already done it somewhere I may scan it and upload it...

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1981 Honda CB750C Custom Rat/Cafe Project
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genesound
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Joined: Jul 24, 2007
Posts: 41140
Location: Studio City, CA

PostPosted: Sun Oct 01, 2017 11:58 pm Reply with quote Back to top

Welcome to here wave

So the CB750Ca and Cb are European market bikes?

We have the CB750 book for the North American market bikes here, as you may be aware.

_________________
NMT - New Member's Thread, a Must Read, click here!!! - Information For New and Veteran Members.
Contains SITE RULES, where to enter your bike information, 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.

ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
For Honda Shop Manuals, Click Here.
Click here to go fiche at Parts Pit Stop.
Click here to go fiche at Partzilla.
Sean's Bike Maintenance Checklist Click!
MacGregor Carb Rebuilding Manual, Click Here.
⊳⊳⊳⊳Learn to use the Search Engine Click Here.⊲⊲⊲⊲
Be sure to use Copper Anti-Seize on your Spark Plug Threads!
To Fix and Better Understand Your DOHC Honda Charging System, Click Here.

ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
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___ImageCB1000C __ Image ___ CB1100FImage__
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folsoml
Power Poster
Power Poster



Joined: Nov 20, 2012
Posts: 2570
Location: Tallahassee, Florida

PostPosted: Mon Oct 02, 2017 5:25 am Reply with quote Back to top

Welcome!

_________________
My Current Bikes: 2005 HD Electra Glide, 2014 HD Electra Glide (work bike), 2007 Yamaha Vino

Former Bikes: 1981 CB900C, 2006 Suzuki DR200SE, 1994 BMW K1100LT, 1983 HD XLH Sportster, 1981.5 CB900C, 1973 Suzuki TS100. 1980 CB750C, 1980 GL1100 Goldwing, 1989 Suzuki Katana 750, 2 Suzuki JR50´s, 1981 Honda CB650, 1982 Honda CB900C, 1982 Yamaha XJ550 Maxim, 2001 Yamaha V-star, 1980 Yamaha 400, 198? Suzuki Madura, 1974 Triumph T140E, Yamaha PW50, 1984 VF500F Interceptor, 1980 Honda CB900C
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pd750
Moderator



Joined: Aug 01, 2007
Posts: 23118
Location: Streator , Illinois

PostPosted: Mon Oct 02, 2017 8:16 am Reply with quote Back to top

Welcome to the site DotTheIs ... Smile

_________________
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 .
NOTE : In order for your signature to show up in posts you also have to check the box that's labeled "Attach signature (signatures can be changed in profile)" , just below the Quick Reply box at the bottom of threads , when making your next post . This only has to be done once . Thanks

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
* *
Every man makes his own chains .
* *
A candle loses nothing by lighting another candle ...

"The only thing that you have which can never be replaced or recovered is your time. Use it well." Author Unknown .
* *
1982 CB750C - Sold > Looking for my next one .
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Duke
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Joined: Sep 27, 2009
Posts: 13052
Location: ABQ, NM, USA

PostPosted: Mon Oct 02, 2017 10:41 am Reply with quote Back to top

Welcome

_________________
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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RIP Oliver
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holysmokes
Admin



Joined: Jul 25, 2007
Posts: 35525
Location: ridge road springfield nova scotia

PostPosted: Mon Oct 02, 2017 1:36 pm Reply with quote Back to top

Hello

_________________
On a steel horse i ride
.mm to inch conversion chart
http://www.carolynrelei.com/inchchart.htm
picture posting
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=127
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>
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=13611&highlight=carb
verifying ground
https://www.youtube.com/watch?v=SyNYlaoInUE
checking stator
https://www.youtube.com/watch?v=5v2LtHlvcqI
checking r/r
https://www.youtube.com/watch?v=kDx3zgOLShY
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
http://www.cb750c.com/modules.php?name=Forums&file=viewtopic&t=6935&highlight=shadow
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minds to be.” ― Abraham Lincoln
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85 v45 magna
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DotTheIs
This Just In
This Just In



Joined: Oct 01, 2017
Posts: 7
Location: UK

PostPosted: Tue Oct 03, 2017 10:28 am Reply with quote Back to top

genesound wrote:
Welcome to here wave

So the CB750Ca and Cb are European market bikes?

We have the CB750 book for the North American market bikes here, as you may be aware.


My bike was imported into the UK from the States and I bought this parts catalogue from ebay around the same time I got hold of her.

I've downloaded quite a few technical documents from here, thanks! But I didn't see anything like this for the 750 Custom model.... My eyes?

This is not the workshop manual but the full parts catalogue with all the official Honda parts numbers and exploded diagrams for these bikes from 1980-1983 (I think).

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1981 Honda CB750C Custom Rat/Cafe Project
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genesound
administrator



Joined: Jul 24, 2007
Posts: 41140
Location: Studio City, CA

PostPosted: Tue Oct 03, 2017 12:13 pm Reply with quote Back to top

The 750c specific info is in the addenda, this is explained in the NMT:

Click here to see where The NMT wrote:
Some Facts and FAQs:

Honda Shop Manuals and Wiring Diagrams - Technical Documents section. CLICK HERE

As a prerequisite to posting, we require that you read and become familiar with the Honda Shop Manual for your bike and this thread. There is stuff in these that you won't find unless you get familiar with the layout of them. And we don't take lightly to typing out answers over and over to the simple questions that are readily available in the Honda Shop Manual that we have here, or in this thread's message.

We have the Honda Shop Manuals with their Wiring Diagrams in pdf form available as Announcement listings in our Technical Documents section.

When using the Honda Shop Manuals, you need to look in the addenda for all the stuff pertinent to your year and model. The Honda 750 book was written for the 1979 K, then there are add-ons for the various other 750s and years. Also you might need to look at all of them. If something was updated in the 1981 version, they didn't necessarily include it in the 1982 addendum, you have to get it from the 1981 section. They are incremental, not all inclusive.

Same goes for the 900 book, it was written for the 80 900C, the other years and models are add-ons in the addenda.

We also have the Honda Common Service Manual in the Technical Documents area. It has more general motorcycle maintenance and "how stuff works" type information. If you don't have a lot of background in motorcycle mechanics, you should read up on this one too.

The Owner's Manuals for several models are also in the Technical Documents section. There is not a lot of difference in them, so find one similar to your model and read it, until we might get all the models available.
_____________________
Parts Fiches

Partzilla, Parts Pit Stop and numerous other OEM Honda parts dealers in the US have their parts fiche online with the OEM part numbers, availability (sometimes not accurate), and pricing, that can help you determine what parts are necessary, what parts are still available from Honda, and what bikes use the same part numbered parts in common. Please avail yourself of these resources yourself instead of asking someone else, who then has to go look up your parts on one of these places and read the information back to you.


http://www.partspitstop.com/oemparts/#/c/honda_motorcycle/parts

http://www.partzilla.com/parts/search/Honda/Motorcycle/parts.html

_____________________

_________________
NMT - New Member's Thread, a Must Read, click here!!! - Information For New and Veteran Members.
Contains SITE RULES, where to enter your bike information, 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.

ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
For Honda Shop Manuals, Click Here.
Click here to go fiche at Parts Pit Stop.
Click here to go fiche at Partzilla.
Sean's Bike Maintenance Checklist Click!
MacGregor Carb Rebuilding Manual, Click Here.
⊳⊳⊳⊳Learn to use the Search Engine Click Here.⊲⊲⊲⊲
Be sure to use Copper Anti-Seize on your Spark Plug Threads!
To Fix and Better Understand Your DOHC Honda Charging System, Click Here.

ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
ImageImageImage
___ImageCB1000C __ Image ___ CB1100FImage__
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DotTheIs
This Just In
This Just In



Joined: Oct 01, 2017
Posts: 7
Location: UK

PostPosted: Tue Oct 03, 2017 12:58 pm Reply with quote Back to top

This book I have is a not a shop manual it's more of a parts fiche I guess...

_________________
1981 Honda CB750C Custom Rat/Cafe Project
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genesound
administrator



Joined: Jul 24, 2007
Posts: 41140
Location: Studio City, CA

PostPosted: Tue Oct 03, 2017 4:18 pm Reply with quote Back to top

So, parts diagrams with exploded diagrams and part numbers? That should help for EU bikes.

Every online dealer around here has easily accessible parts diagrams for the North American bikes.

www.cmsnl.com has parts diagrams for most of the various global honda distributions, like EU, or Aussie, etc.

_________________
NMT - New Member's Thread, a Must Read, click here!!! - Information For New and Veteran Members.
Contains SITE RULES, where to enter your bike information, 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.

ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
For Honda Shop Manuals, Click Here.
Click here to go fiche at Parts Pit Stop.
Click here to go fiche at Partzilla.
Sean's Bike Maintenance Checklist Click!
MacGregor Carb Rebuilding Manual, Click Here.
⊳⊳⊳⊳Learn to use the Search Engine Click Here.⊲⊲⊲⊲
Be sure to use Copper Anti-Seize on your Spark Plug Threads!
To Fix and Better Understand Your DOHC Honda Charging System, Click Here.

ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
ImageImageImage
___ImageCB1000C __ Image ___ CB1100FImage__
View user's profile Send private message Visit poster's website
Whozaa
Moderator



Joined: May 09, 2010
Posts: 5680
Location: St Louis, Missouri USA

PostPosted: Wed Oct 04, 2017 7:54 am Reply with quote Back to top

DotTheIs wrote:
Incidentally I have genuine Honda 750Ca CB750Cb parts catalogue in English, French and German... If I get enough interest and no-one's already done it somewhere I may scan it and upload it...


I'd be interested in seeing a couple pages of it. Just to understand what it is.

_________________
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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