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Author Topic: 79 CBX project  (Read 7931 times)

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Offline SanDogDewey

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Re: 79 CBX project
« Reply #50 on: January 04, 2024, 01:29:10 PM »
I built a jig to pull those pressed in idle jets out. See this thread for details.

http://www.cbxworld.com/modules.php?name=Forums&file=viewtopic&t=11188&postdays=0&postorder=asc&&start=30
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Offline newday777

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Re: 79 CBX project
« Reply #51 on: January 04, 2024, 02:11:01 PM »
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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

Offline SanDogDewey

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Re: 79 CBX project
« Reply #52 on: January 04, 2024, 02:38:00 PM »
Here’s the photos of the jig.
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Offline BallAquatics

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Re: 79 CBX project
« Reply #53 on: January 04, 2024, 06:13:47 PM »
I just used Mike's method....

Measured how deep it was to the top of the jet...


Marked a drill bit to that depth + 4mm and drilled a pilot hole...


Tapped the hole with 4-40 thread...


Then used a stainless steel screw with a fender washer and a nut to extract the jet...



I soaked the jets over night with PB blaster and although it takes a bit of time, they came out pretty easy.

I'm hoping to start putting the first half rack back together tomorrow.   ;D
« Last Edit: January 04, 2024, 06:25:05 PM by BallAquatics »
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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 #54 on: January 07, 2024, 11:53:57 AM »
Carbs 1, 2, & 3 done and dusted...  Hope to do 4,5, & 6 next week!


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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 BenelliSEI

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Re: 79 CBX project
« Reply #55 on: January 07, 2024, 01:55:01 PM »
Good on you, nicely done!
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Offline BallAquatics

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Re: 79 CBX project
« Reply #56 on: January 07, 2024, 02:43:30 PM »
Quote from: BenelliSEI on January 07, 2024, 01:55:01 PM
Good on you, nicely done!

Thanks John.  I'll have to admit I was a bit intimidated starting this carb job, but hey carbs are carbs.  Split them into two sets of three, I've done sets of four countless times...  doing three seemed to make the job more doable.  Does that make sense???
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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 Stev-o

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Re: 79 CBX project
« Reply #57 on: January 08, 2024, 07:34:00 AM »
Looks good!
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Offline Don R

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Re: 79 CBX project
« Reply #58 on: January 08, 2024, 10:22:19 AM »
  A friend has a shop and cleaned a set of cbx carbs, he was proud of how good it ran when he was done. The owner took the bike home, put cheap gas in it and let it sit for 8 months. Then when he tried to ride it, he complained that they didn't stay cleaned. 
  Charlie gave him one courtesy cleaning and told him it was running good when it left the shop. No extended warranty that the carbs could stay that way. 
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Offline BenelliSEI

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Re: 79 CBX project
« Reply #59 on: January 10, 2024, 12:09:31 PM »
Quote from: BallAquatics on January 07, 2024, 02:43:30 PM
Quote from: BenelliSEI on January 07, 2024, 01:55:01 PM
Good on you, nicely done!

Thanks John.  I'll have to admit I was a bit intimidated starting this carb job, but hey carbs are carbs.  Split them into two sets of three, I've done sets of four countless times...  doing three seemed to make the job more doable.  Does that make sense???

Makes sense to me!
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Offline MauiK3

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Re: 79 CBX project
« Reply #60 on: January 11, 2024, 06:52:37 AM »
Awesome stuff!!
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Offline BallAquatics

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Re: 79 CBX project
« Reply #61 on: January 11, 2024, 09:12:35 AM »
Carbs rebuilt and rack put back together.....


Getting choke to work smoothly was a bit fiddly.  Spent about half an hour until I realized it was just a lack of lube after the ultrasonic.  A drop of lube here and one there and all was right with the world again.

Carb tops have a bit of stain around the fuel inlet pipe so I might do a bit of polishing there before putting them back in.  Waiting for float valves from PJ Motorsports in Oregon before I can set float height.  Also have new carb boots on the engine side coming.  Rubber on the air cleaner side is still nice and pliable.


Checking the overflow tubes for cracks while I'm waiting on the parts.
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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 Trevor from Warragul

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Re: 79 CBX project
« Reply #62 on: January 11, 2024, 06:38:02 PM »
Two bar clamps and a curved piece of timber/steel flat bar will make installing the carburetors a lot easier... (speaking from experience!)

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Offline BallAquatics

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Re: 79 CBX project
« Reply #63 on: January 14, 2024, 10:05:15 AM »
Well only one bowl with a leaking overflow tube.  Was leaking where the tube goes into the bottom of the bowl.  A bit of flux and a touch of solder and it's good to go.  Looks like my float valves might be here a day early...  USPS says they are in Cincinnati, that typically means I get the package the next day.   ;D


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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 BenelliSEI

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Re: 79 CBX project
« Reply #64 on: January 14, 2024, 02:06:19 PM »
How did you clean up that tool set? Looks good!
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Offline BallAquatics

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Re: 79 CBX project
« Reply #65 on: January 14, 2024, 03:15:09 PM »
Quote from: BenelliSEI on January 14, 2024, 02:06:19 PM
How did you clean up that tool set? Looks good!

WD-40, some 000 steel wool, and lots of elbow grease.  Lol  Really happy with the way the whole bike is cleaning up.  Inside the gas tank is probably the worst...  need to run to Harbor Freight to get a couple more gallons of Evaporust.
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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 jgger

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Re: 79 CBX project
« Reply #66 on: January 14, 2024, 03:50:53 PM »
Check out the evaporust online. I think last time I looked at both Jegg's and Wal Mart 5 gallons was just under $100.
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Offline newday777

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Re: 79 CBX project
« Reply #67 on: January 15, 2024, 02:42:42 AM »
Quote from: BallAquatics on January 14, 2024, 03:15:09 PM

Inside the gas tank is probably the worst...  need to run to Harbor Freight to get a couple more gallons of Evaporust.

You need to fill the tank full to the cap with Evaporust not just partially. Buy the 5 gal bucket. You can reuse it if you strain it and do more tanks for others.
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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

Offline scottly

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Re: 79 CBX project
« Reply #68 on: January 15, 2024, 07:37:17 PM »
Quote from: BallAquatics on January 11, 2024, 09:12:35 AM
Carbs rebuilt and rack put back together.....


Getting choke to work smoothly was a bit fiddly.  Spent about half an hour until I realized it was just a lack of lube after the ultrasonic.  A drop of lube here and one there and all was right with the world again.

Carb tops have a bit of stain around the fuel inlet pipe so I might do a bit of polishing there before putting them back in.  Waiting for float valves from PJ Motorsports in Oregon before I can set float height.  Also have new carb boots on the engine side coming.  Rubber on the air cleaner side is still nice and pliable.


Checking the overflow tubes for cracks while I'm waiting on the parts.
Good job, not to mention you saved $1050 plus shipping by doing it yourself! ;D ;D
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Offline MauiK3

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Re: 79 CBX project
« Reply #69 on: January 16, 2024, 06:45:56 AM »
Beautiful!!
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Offline Stev-o

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Re: 79 CBX project
« Reply #70 on: January 18, 2024, 09:13:45 AM »
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline BallAquatics

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Re: 79 CBX project
« Reply #71 on: January 18, 2024, 11:05:56 AM »
Quote from: newday777 on January 15, 2024, 02:42:42 AM
You need to fill the tank full to the cap with Evaporust not just partially. Buy the 5 gal bucket. You can reuse it if you strain it and do more tanks for others.

Quote from: Stev-o on January 18, 2024, 09:13:45 AM
I recently bought 3.5 gal from Summit...

Carbs look great!

Thanks guys!  Well I had 4 gallons, but I did end up buying a 5 gallon bucket from Amazon.  Specs say 5.5 gallon tank, but I put closer to 6 gallons in to get it right to the top of the fill neck.

Also needed to do work to the original petcock.  It was completely clogged up and no amount of ultrasonic was making any head way.

Unlike other Honda's, it's riveted together and not meant to be rebuilt.  NOS is going for around $100.  With that in mind I drilled the tops off the rivets and taped the body to use a couple of the old choke butterfly screws to hold things together.


The rubber disc with the four holes inside is shot so I'll have to track down a new one.  I'm sure another model uses one that will fit...  it doesn't look to be anything special.  The original doesn't have a sediment bowl which I'm not really happy with, but I'd like to keep it as original as possible.
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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 #72 on: January 19, 2024, 12:26:34 PM »
Carbs are complete!  Float valves installed, float height set, and all leak tested.  Block of wood holds throttle wide open to help with installing throttle cables.


New boots on the engine side too!  Tomorrow is gonna be carb reinstall day.....

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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 BenelliSEI

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Re: 79 CBX project
« Reply #73 on: January 19, 2024, 12:55:48 PM »
Dennis…. They look superb. Well done!
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Offline RAFster122s

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Re: 79 CBX project
« Reply #74 on: January 19, 2024, 01:46:11 PM »
Quote from: BallAquatics on December 28, 2023, 06:14:26 AM
Well, the brakes are done and dusted.....  at least until it rolls down the road.  The rear master was the worst of the lot.  Completely seized.  Put it in the vise and used brake fluid and a bolt wrapped with plumbers tape to hydraulically force the piston out of the housing.

The front master was full of jelly, but repeated flushing with clean brake fluid cleaned it right up.  Will probably remove the housing at a later date and treat it to remove the yellowing of the plastic.  The rear reservoir is tucked up under the seat and is not nearly as yellowed.


I'm really liking the rebuild kits from Brake Crafters.  They come complete with everything you need to do a rebuild whether it's a caliper or a master.  Highly recommended!



That Red Rubber Grease in the small container?

Having dealt with Girling and ATE brakes on cars years ago I have some experience with red rubber grease, but that is not as opaque as the stuff in Girling rebuild kits


Nice work on the carbs, they look spify all cleaned up…
« Last Edit: January 19, 2024, 01:50:05 PM by RAFster122s »
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