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Author Topic: CB400 Four, version 9.0 for ME I flip for 400 fours  (Read 30752 times)

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Offline RAFster122s

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Re: CB400 Four, version 9.0 for ???
« Reply #25 on: May 19, 2016, 09:00:37 PM »
Momo,
You can't standby and let one of these bikes be crushed, you must like raising the dead...

Is that a sulfur yellow?

You have something to keep your hands busy with now.

It might keep you out of trouble. ;D

Watching this one develop...

David
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David- back in the desert SW!

Offline SOHC4 Cafe Racer Fan

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Re: CB400 Four, version 9.0 for ???
« Reply #26 on: May 19, 2016, 10:49:28 PM »
You're on a mission . . .

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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 MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #27 on: May 20, 2016, 02:07:50 AM »
Quote from: RAF122S on May 19, 2016, 09:00:37 PM
Momo,
You can't standby and let one of these bikes be crushed, you must like raising the dead...

Is that a sulfur yellow?

You have something to keep your hands busy with now.

It might keep you out of trouble. ;D

Watching this one develop...

David



It is a rattle can job not parakeet yellow, so I don''t know what it is but I do have a fondness for yellow 400 fours

one of my favorites




Hope all is well at your end David...Larry

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Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #28 on: May 20, 2016, 02:16:07 AM »
Quote from: CB750 Cafe Racer Fan on May 19, 2016, 10:49:28 PM
You're on a mission . . .



Along with most any Mel Brooks movie and Airplane the Blues Brothers are my top of the line movies.   

  It's a hundred and six miles to Philly,  I've got a full tank of gas, half a bucket of brains, it's dark, and I'm wearing sunglasses.


Welcome all.  I hope to do this old, neglected 400 justice...Larry
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Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #29 on: May 20, 2016, 02:20:54 AM »
Quote from: strynboen on May 19, 2016, 05:28:17 AM
nice that the piston vas stuck in upper posision..so most of the bore is.. prob.. not rusted..a sqvz of aft and diesel and some heat..and it vill boil.. and free it up...dont use asetone and fire at same time ::)


I've seen videos where people actually light whatever solution on fire in an attempt to free the seized piston.  I have a spare cylinder but I removed the liners and sold them to a forum member.   Also, I have two sets of pistons stashed somewhere
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Offline calj737

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Re: CB400 Four, version 9.0 for ???
« Reply #30 on: May 20, 2016, 03:34:12 AM »
Kerosene or SeaFoam. Kerosene is far cheaper if you can source it locally.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #31 on: May 20, 2016, 04:47:04 AM »
Quote from: calj737 on May 20, 2016, 03:34:12 AM
Kerosene or SeaFoam. Kerosene is far cheaper if you can source it locally.


I've used Seafoam to unseize.  The seller of the bike gave me Kroil, which is presently in the cylinder.   Are recommending putting kero in the cylinder and lighting it up???  thanks for your input....Larry
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Offline b52bombardier1

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Re: CB400 Four, version 9.0 for ???
« Reply #32 on: May 20, 2016, 04:55:02 AM »
Some high wattage heat gun heat around the cylinder can also work. Takes longer but less chance of catching something on fire.

Rick

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1971 School Bus Yellow Aermacchi H-D Sprint 350
1972 Candy Yellow CL100 K2
1972 Candy Jet Green Honda CB500
1973 Mighty Green ST90 K0
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1975 Topaz Orange ST90 K2
1976 Shiny Orange CT90
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Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #33 on: May 20, 2016, 05:16:35 AM »
Quote from: b52bombardier1 on May 20, 2016, 04:55:02 AM
Some high wattage heat gun heat around the cylinder can also work. Takes longer but less chance of catching something on fire.

Rick

Sent from my SAMSUNG-SM-N900A using Tapatalk






I have a high wattage heat gun as well as a propane torch. thanks for posting...Larry
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Offline SOHC4 Cafe Racer Fan

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Re: CB400 Four, version 9.0 for ???
« Reply #34 on: May 20, 2016, 08:55:28 AM »
Quote from: b52bombardier1 on May 20, 2016, 04:55:02 AM
Some high wattage heat gun heat around the cylinder can also work. Takes longer but less chance of catching something on fire.

Rick

Sent from my SAMSUNG-SM-N900A using Tapatalk

If the motor is out, who cares? Have you seen Cal's engine unseize cocktail??
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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 MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #35 on: May 20, 2016, 03:44:34 PM »
Quote from: CB750 Cafe Racer Fan on May 20, 2016, 08:55:28 AM
Quote from: b52bombardier1 on May 20, 2016, 04:55:02 AM
Some high wattage heat gun heat around the cylinder can also work. Takes longer but less chance of catching something on fire.

Rick

Sent from my SAMSUNG-SM-N900A using Tapatalk

If the motor is out, who cares? Have you seen Cal's engine unseize cocktail??


motor still in frame with head off.  Haven't seen the cocktail
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Offline calj737

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Re: CB400 Four, version 9.0 for ???
« Reply #36 on: May 20, 2016, 04:55:45 PM »
A 4 hour long BBQ after months of MMO, Kroil and ATF/Acetone soaked. Finally gave up and yanked the motor, pried the head, and filled the jugs with Kerosene. Lit 'er up, stood by in the freezing snow and sleet and kept adding more until the rusty bast-ages finally gave way.

If the motor is still in the frame, SeaFoam is my recommendation. Heat guns won't do diddly on rusted metal inside of aluminum; too dissipated. Propane directly at the piston (if you have decent access) or SeaFoam. SeaFoam ignites, but is very low combustion so you don't get that "WOOSH!" when she fires up. In fact, a buddy who is a Deputy Fire Chief turned me onto using it as they do fill their entire fuel tanks with it on First Responder vehicles for safety issues (fuel tanks near raging fires...). Says it won't combust inside their tanks.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline b52bombardier1

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Re: CB400 Four, version 9.0 for ???
« Reply #37 on: May 20, 2016, 05:19:13 PM »
His cocktail can't beat my blend of diesel fuel, kerosene and alligator blood. This is Louisiana, after all.

Rick

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1971 School Bus Yellow Aermacchi H-D Sprint 350
1972 Candy Yellow CL100 K2
1972 Candy Jet Green Honda CB500
1973 Mighty Green ST90 K0
1974 Mars Orange CT90 K5
1975 Topaz Orange ST90 K2
1976 Shiny Orange CT90
2006 Honda Foreman 500 (restored)

Offline calj737

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Re: CB400 Four, version 9.0 for ???
« Reply #38 on: May 20, 2016, 05:49:35 PM »
Quote from: b52bombardier1 on May 20, 2016, 05:19:13 PM
His cocktail can't beat my blend of diesel fuel, kerosene and alligator blood. This is Louisiana, after all.

Rick

Sent from my SAMSUNG-SM-N900A using Tapatalk
Ha! If you really want to release it, crank up the welder to about 200Amps on DC and touch her off. I'd like to see you puny alligators take that!!!!  ;) ;D ;D ;D
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #39 on: May 20, 2016, 09:13:47 PM »
Only #4 is seized, it has been soaking in a mix of Kroil and Seafoam only a day-didn't budge one bit tonight.  I lit it up but not for long, when i get a chance I'll burn it for a couple hours. 
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Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #40 on: May 20, 2016, 09:47:07 PM »
Removed more parts after I got home from work.


notice the beautiful S-curve design of the overgrown brake line :P
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Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #41 on: May 20, 2016, 09:51:28 PM »

 the standard headlight chip from not putting the lip on the rim under the shell.  Most every 400 I ever had had this piece broken off :(

Also the shell is damaged worse than I thought


Have a spare shell but it also has the standard missing piece
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Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #42 on: May 20, 2016, 09:55:23 PM »
Tried firing up the stuck piston but did not realize I needed to torch it for several hours,


that is burning Kroil BTW...Larry
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Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #43 on: May 20, 2016, 10:05:01 PM »
Notice the special custom made rear turn signal cushions, I think the PO should patent that design and market as I've never seen a finer product



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Offline grcamna2

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Re: CB400 Four, version 9.0 for ???
« Reply #44 on: May 20, 2016, 10:43:50 PM »
Quote from: RAF122S on May 19, 2016, 09:00:37 PM
Momo,
You can't standby and let one of these bikes be crushed, you must like raising the dead...

Is that a sulfur yellow?

You have something to keep your hands busy with now.

It might keep you out of trouble. ;D

Watching this one develop...

David

Yeah buddy,you give this old girl that special touch Larry  ;) a 1977 model/yr. ?
« Last Edit: May 20, 2016, 10:50:49 PM by grcamna2 »
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
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Offline zammykoo

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Re: CB400 Four, version 9.0 for ???
« Reply #45 on: May 21, 2016, 08:08:10 AM »
Looking forward to see if the burning kroil works out for you. I released my stuck piston by tapping the jugs with a piece of wood and mallet, on where I felt were the beefiest/strongest parts of the aluminum. Took several times going back and fourth between the left and right sides to raise it evenly. This was after trying to torch the piston with map gas and soaking in marvel mystery for several months.
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Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #46 on: May 21, 2016, 08:52:44 AM »


Yeah buddy,you give this old girl that special touch Larry  ;) a 1977 model/yr. ?
[/quote]




early production run 1001342.  If it were a 77 I doubt I would have been tempted to buy it
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Offline MoMo

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Re: CB400 Four, version 9.0 for ???
« Reply #47 on: May 21, 2016, 08:54:43 AM »
Quote from: zammykoo on May 21, 2016, 08:08:10 AM
Looking forward to see if the burning kroil works out for you. I released my stuck piston by tapping the jugs with a piece of wood and mallet, on where I felt were the beefiest/strongest parts of the aluminum. Took several times going back and fourth between the left and right sides to raise it evenly. This was after trying to torch the piston with map gas and soaking in marvel mystery for several months.



I've been smashing with a fairly large dead blow. 3 pistons free, only #4 stuck(and it is STUCK >:( >:()
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Offline calj737

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Re: CB400 Four, version 9.0 for ???
« Reply #48 on: May 21, 2016, 09:39:26 AM »
As soon as the fire goes out, splash some acetone in there. It should seep down onto the rings and work at the rust. Then, re-light it with SeaFoam.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline zammykoo

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Re: CB400 Four, version 9.0 for ???
« Reply #49 on: May 21, 2016, 10:26:11 AM »
Quote from: MoMo on May 21, 2016, 08:54:43 AM

I've been smashing with a fairly large dead blow. 3 pistons free, only #4 stuck(and it is STUCK >:( >:()

I feel your pain! My #3 piston was the last one to get unstuck. My method was to try and utilize the crankcase' weight as leverage by strapping the jugs to my makeshift mini gantry. I actually had 3 straps (2 not pictured for some reason) left, center, & right sides. I believe this really helped me get it off. Once strapped evenly distributing the weight, I hit the jugs upward with the wood/mallet. The engine is fully suspended an inch lifted off the cart at this point. I didn't have to smash that hard because with each hit, the engine weight helped sag it out slowly.

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