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Author Topic: 79 CBX project  (Read 8012 times)

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Offline BallAquatics

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79 CBX project
« on: June 05, 2018, 05:39:08 AM »
Well the 74 CB550 is running great thanks to all the help I received here.  Guess it's time to start on it's big brother.  Both were parked back in 88 NOT with the intention of leaving them for 29 years.

I'm hoping the CBX will be as easy as the 550.  Some rust in the tank carb rebuild and some brake work.  Fingers crossed.  My evapo-rust was delivered yesterday!



Right now the bike is as dead as a door nail.  Off with the tank for cleaning and a wiring inspection will be next.  Probably purchase Mike Nixon's booklet, "Rebuilding the CBX1000 Carburetor" before starting on the carb rebuilds.

Dennis
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Dennis...  74 CB550  79 CBX  82 Seca Turbo  2011 CBR  2012 NC700X

You will regret the bikes you DIDN'T buy much more than the ones you DID!!!  It's never too late to start a new adventure!

Offline innovativems

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Re: 79 CBX project
« Reply #1 on: June 05, 2018, 06:47:43 AM »
Gorgeous cbx!


Sent from my iPhone using Tapatalk
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2007 KTM 990 adv
2003 Honda RC51
2000 Yamaha YSR50
1978 Honda Express
1975 Honda CB400f
1974 Honda CB350f
1974 Kawi H2
1974 Honda CB550f
1971 Kawi h1
1973 Kawi h1
1974 gt 550
1974 gt550

Offline 70CB750

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Re: 79 CBX project
« Reply #2 on: June 05, 2018, 08:10:14 AM »
Following  :)
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Offline Bankerdanny

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Re: 79 CBX project
« Reply #3 on: June 05, 2018, 09:08:07 AM »
Nice. I love the early twin shock CBX's
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Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline MikeSimon

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Re: 79 CBX project
« Reply #4 on: June 05, 2018, 11:14:57 AM »
If your CBX was parked in '88, you WILL have to go through the carbs! There is, never has been any CBX that was parked for more than 2 years which did not require carb work. If the carbs were no drained, the small jets and the accelerator circuit are gummed up. If the carbs were drained, most likely the O-rings are dried out and leaking.
Prepare yourself for quite a few hours of work and/or frustration. Engine need to be tilted to get the carbs out and very few get the carbs running right on first try.
If you don't have it already, Mike Nixon, a former Honda service rep put together an invaluable little pamphlet on how to restore CBX carbs.
It is available on ebay of from the author himself.

 https://www.motorcycleproject.com/

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1973 CB350F -sold
1974 CB350F -218 orig miles, sold
1976 CB750K - in restoration

Other Hondas:
3 x CBX
CB1100R
GB500
Plus Kawasakis, BMws & Ducatis

Offline MRieck

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Re: 79 CBX project
« Reply #5 on: June 05, 2018, 11:32:54 AM »
Parts can be a PITA to find and very expensive.....I have a red 79 in pieces and have been collecting all the parts for 5 years. Have 99% of the parts now and even scored a NOS Sport Kit for a very fair price.
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Offline DurangoCB

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Re: 79 CBX project
« Reply #6 on: June 05, 2018, 11:42:35 AM »
Love those bikes.  Have fun!
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1971 CB500 Four- current project http://forums.sohc4.net/index.php/topic,170622.0.html
1978 CX500- next in line

Offline strynboen

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Re: 79 CBX project
« Reply #7 on: June 05, 2018, 01:27:39 PM »
thek the generator..and thange the bearings  and brushes...carbs is a bit hell to Work on....get a real good gasket/o ring kit..vho can hold up for fuel...strange some dont do that...
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Offline kpier883

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Re: 79 CBX project
« Reply #8 on: June 05, 2018, 08:31:32 PM »
Randall has a very good kit for CBX carbs.  It and the book you mentioned are what I used.

https://www.randakks.com/honda-cbx-randakk-master-carb-overhaul-kit.html

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Offline BallAquatics

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Re: 79 CBX project
« Reply #9 on: June 05, 2018, 08:34:20 PM »
Thanks for the comments & info guys.

Mike's carb rebuild book is on the way.....


strynboen, I'm leaning towards using the Randakk carb rebuild kit.....

https://www.randakks.com/honda-cbx-randakk-master-carb-overhaul-kit.html

Dennis
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Dennis...  74 CB550  79 CBX  82 Seca Turbo  2011 CBR  2012 NC700X

You will regret the bikes you DIDN'T buy much more than the ones you DID!!!  It's never too late to start a new adventure!

Offline BallAquatics

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Re: 79 CBX project
« Reply #10 on: June 05, 2018, 08:38:57 PM »
Quote from: kpier883 on June 05, 2018, 08:31:32 PM
Randall has a very good kit for CBX carbs.  It and the book you mentioned are what I used.

https://www.randakks.com/honda-cbx-randakk-master-carb-overhaul-kit.html

Thanks kpier883!  That's the direction I've been leaning towards.  Looks to be a very complete kit.

Dennis
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Dennis...  74 CB550  79 CBX  82 Seca Turbo  2011 CBR  2012 NC700X

You will regret the bikes you DIDN'T buy much more than the ones you DID!!!  It's never too late to start a new adventure!

Offline strynboen

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Re: 79 CBX project
« Reply #11 on: June 06, 2018, 06:19:57 AM »
be very carefull vhen lockteit the choke plates schrevs...i got mine glued solid...thorth it vas better then use Lock/cut vashers...
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Offline MoMo

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Re: 79 CBX project
« Reply #12 on: June 06, 2018, 07:03:18 AM »
subscription sent in.  Never forget the test rides after working on one "back in the day".   Larry
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Offline MikeSimon

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Re: 79 CBX project
« Reply #13 on: June 06, 2018, 07:53:40 AM »
You will have to pull the pressed-in slow jets out. They sit under rubber plugs. You can tap them and use a small M3 or M4 screw to pull them out. Very difficult to get completely clean without pulling them. Also, the emulsion tubes have a tendency to stick. You may have to heat the jet tower they sit in and/or soak the carbs in hot soapy water for a while.
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1973 CB350F -sold
1974 CB350F -218 orig miles, sold
1976 CB750K - in restoration

Other Hondas:
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CB1100R
GB500
Plus Kawasakis, BMws & Ducatis

Offline Bob3050

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Re: 79 CBX project
« Reply #14 on: June 06, 2018, 09:00:26 AM »
Find a turbo kit for it and you can leave those six carbs in the garage.
Bob
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Offline MikeSimon

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Re: 79 CBX project
« Reply #15 on: June 06, 2018, 12:53:35 PM »
Quote from: Bob3050 on June 06, 2018, 09:00:26 AM
Find a turbo kit for it and you can leave those six carbs in the garage.
Bob

 :o :o you could also replace the motor with a 104 cu-in V-Twin.... ::)
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1973 CB350F -sold
1974 CB350F -218 orig miles, sold
1976 CB750K - in restoration

Other Hondas:
3 x CBX
CB1100R
GB500
Plus Kawasakis, BMws & Ducatis

Offline kslrr

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Re: 79 CBX project
« Reply #16 on: June 07, 2018, 07:03:16 AM »
Following
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Now  1972 CB350FX (experimental v2.0)
        1981 CB650c Custom with '79 engine (wifes)
        1981 CB650 engine
        2004 HD XL883C Custom
        1977 Yamaha XS750D (in progress)
Then 1972 CL175
        1964 Yamaha YGS-1T
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Offline bill440cars

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Re: 79 CBX project
« Reply #17 on: June 11, 2018, 02:21:13 PM »
 
    Good looking CBX, be looking in to see how it goes with yours. I had a 1980 CBX, for about 6 years. Then, situation changed & I needed to come up with some cash and with me getting older, I thought it was best to let it go. Boy, I have been regretting it ever since.   
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Main Rides: '02 Durango, '71 Swinger & Dad's '93
                  Dakota LE 4x4 '66 CB77 & '72 SL350K2
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Offline BallAquatics

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Re: 79 CBX project
« Reply #18 on: June 13, 2018, 02:17:58 AM »
Got Mike's carb rebuild book in the mail and was going to start this weekend, but I got side-tracked with this little beauty.



2011 CBR250R with less than 6000 miles.  Needs just a tiny bit of tlc, but got a great price and it's a blast to ride.  Plus I can ride it to my night job.... won't take the '74 CB550 for fear that something would happen to it in the parking lot.

Dennis
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Dennis...  74 CB550  79 CBX  82 Seca Turbo  2011 CBR  2012 NC700X

You will regret the bikes you DIDN'T buy much more than the ones you DID!!!  It's never too late to start a new adventure!

Offline bill440cars

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Re: 79 CBX project
« Reply #19 on: June 15, 2018, 08:45:07 AM »
Quote from: BallAquatics on June 13, 2018, 02:17:58 AM
Got Mike's carb rebuild book in the mail and was going to start this weekend, but I got side-tracked with this little beauty.



2011 CBR250R with less than 6000 miles.  Needs just a tiny bit of tlc, but got a great price and it's a blast to ride.  Plus I can ride it to my night job.... won't take the '74 CB550 for fear that something would happen to it in the parking lot.

Dennis

       Slick looking ride there. Should be fun.
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Member # 1969
PRAYERS ALWAYS FOR: Bre, Jeff & Virginia, Bear, Trevor & Brianna ( Close Friend's Daughter)
"Because HE lives, I can Face Tomorrow"                  
 You CAN Teach An Old Dog New Tricks, Just Takes A Little Bit Longer & A Lot More Patience!! 
             
Main Rides: '02 Durango, '71 Swinger & Dad's '93
                  Dakota LE 4x4 '66 CB77 & '72 SL350K2
Watch What You Step Into, It Could  End Up A Mess!

Offline jag767

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Re: 79 CBX project
« Reply #20 on: August 08, 2018, 05:23:24 AM »
Fyi if you need any parts, a friend of mine has 3 cbx's, and a parts room for them. Probably enough to build 2 more, at least 1 complete one.
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Offline SOHC4 Cafe Racer Fan

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Re: 79 CBX project
« Reply #21 on: August 21, 2018, 02:36:58 PM »
Nice looking CBX.  I think Nils has restored a few, too. 
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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
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"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)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline PeWe

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Re: 79 CBX project
« Reply #22 on: August 22, 2018, 10:01:48 PM »
I saw a red 79 CBX earlier this week. I like the stock look. I have forgotten how nice the engine sounds. Really quick throttle response.
A NOS looking -79 will be fine in my garage.
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline BallAquatics

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Re: 79 CBX project
« Reply #23 on: December 21, 2023, 05:59:26 AM »
Well it's taken me 5 years, but I brought the CBX home this past weekend!  With a bit of luck hoping to have it road worthy by spring.....

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Dennis...  74 CB550  79 CBX  82 Seca Turbo  2011 CBR  2012 NC700X

You will regret the bikes you DIDN'T buy much more than the ones you DID!!!  It's never too late to start a new adventure!

Offline newday777

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Re: 79 CBX project
« Reply #24 on: December 21, 2023, 07:00:20 AM »
Cool. Did you get anything done to it in the past 5 years it's not been home?
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Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A
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