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Author Topic: Zorro's 1978 CB750 K8  (Read 32832 times)

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Offline Zorro

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Re: Zorro's 1978 CB750 K8
« Reply #100 on: February 12, 2016, 05:33:22 AM »
Starting to take form...




The painter suggested putting black vinyl on the knee dents.  He said rubbing on the flat paint surface will make it shine more.


It's almost ready to be fired up!  I just took the seat pan to the upholster's...might be a month or more before they complete it.
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Offline RandyBMC

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Re: Zorro's 1978 CB750 K8
« Reply #101 on: February 12, 2016, 05:49:54 AM »
Looking good!
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Offline SOHC4 Cafe Racer Fan

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Re: Zorro's 1978 CB750 K8
« Reply #102 on: February 12, 2016, 03:31:26 PM »
Looks great!  I assume you'll get it running and tuned before the seat is ready.
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
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"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)

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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 Zorro

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Re: Zorro's 1978 CB750 K8
« Reply #103 on: March 01, 2016, 07:04:57 AM »
Quick update...
Gas is leaking from one of the tank welds.  Agh!  I contacted legendary motorcycles about the leak.  They're supposed to send me tank liner.  I'm not happy about this.  :(
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Offline SOHC4 Cafe Racer Fan

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Re: Zorro's 1978 CB750 K8
« Reply #104 on: March 01, 2016, 10:41:00 AM »
Quote from: Zorro on March 01, 2016, 07:04:57 AM
Quick update...
Gas is leaking from one of the tank welds.  Agh!  I contacted legendary motorcycles about the leak.  They're supposed to send me tank liner.  I'm not happy about this.  :(

That's BS.  You should send them back the tank for a proper tig weld. Don't they pressure test their finished tanks before sanding and polishing??  I would insist on it.
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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 calj737

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Re: Zorro's 1978 CB750 K8
« Reply #105 on: March 01, 2016, 12:34:35 PM »
Quote from: CB750 Cafe Racer Fan on March 01, 2016, 10:41:00 AM
Quote from: Zorro on March 01, 2016, 07:04:57 AM
Quick update...
Gas is leaking from one of the tank welds.  Agh!  I contacted legendary motorcycles about the leak.  They're supposed to send me tank liner.  I'm not happy about this.  :(

That's BS.  You should send them back the tank for a proper tig weld. Don't they pressure test their finished tanks before sanding and polishing??  I would insist on it.
Except his tank is now painted, so welding is out of the question without a re-paint. Pretty disappointing they sold a tank that wasn't pressure tested, but lining it with Caswell will be fine as a remedy. (Don't let them send you RedKote, Caswell or Por-15 only).
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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 SOHC4 Cafe Racer Fan

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Re: Zorro's 1978 CB750 K8
« Reply #106 on: March 01, 2016, 01:26:23 PM »
Quote from: calj737 on March 01, 2016, 12:34:35 PM
Quote from: CB750 Cafe Racer Fan on March 01, 2016, 10:41:00 AM
Quote from: Zorro on March 01, 2016, 07:04:57 AM
Quick update...
Gas is leaking from one of the tank welds.  Agh!  I contacted legendary motorcycles about the leak.  They're supposed to send me tank liner.  I'm not happy about this.  :(

That's BS.  You should send them back the tank for a proper tig weld. Don't they pressure test their finished tanks before sanding and polishing??  I would insist on it.
Except his tank is now painted, so welding is out of the question without a re-paint. Pretty disappointing they sold a tank that wasn't pressure tested, but lining it with Caswell will be fine as a remedy. (Don't let them send you RedKote, Caswell or Por-15 only).

 >:( >:( >:( >:(
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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 Zorro

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Re: Zorro's 1978 CB750 K8
« Reply #107 on: March 02, 2016, 06:30:45 AM »
Thanks for the replies fellas.  I'm pretty upset about it.  The first told me to send it back.  I told them I was fine with that but it had just been painted.  I cannot afford to get it repainted.  I would be ok if the welds were on the underside of the tank and it ruined the paint there.  Once I told them it was painted they immediately suggested the liner.  I hear stories of that liner stuff flaking off.  Seems like a nightmare.  I'm so over budget on this...most of it is my own fault...I can't eat another paint job.

Another rant....
I've called 3 times and emailed twice.  Cheryl at Legendary insisted that she will send me the liner but I feel like i'm getting the shaft.  She they moved shops and they're behind.  I guess I'll call again next week.
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Offline calj737

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Re: Zorro's 1978 CB750 K8
« Reply #108 on: March 02, 2016, 06:51:20 AM »
Properly installed, a Caswell liner will not flake off. It's a 2-part epoxy and cures tough as nails. In fact, removing it is a labor of frustration, chemical warfare, and a fools errand. Trust me, I spent 3 months soaking and rinsing and soaking in some very nasty Chems to get one out recently.
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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 Zorro

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Re: Zorro's 1978 CB750 K8
« Reply #109 on: March 08, 2016, 11:41:43 AM »
Since I've found out that my tank is leaking, I've called Legendary one time each week for 4 weeks now.  Each time I spoke with Cheryl.  Each time Cheryl said they'd send me the liner if I sent her an email with my address.  After hanging up, I've sent the email.  It's to the point now I just forward my last email to her. 

I feel I'm already letting them off the hook for using the tank liner instead of fixing the weld.  Now I feel like I'm begging them to send me the liner.  Sheesh.  Can't be that hard to send out liner, can it!?

I'll probably update this thread next week with more complaining instead of progress...
thanks for listening.
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Offline SOHC4 Cafe Racer Fan

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Re: Zorro's 1978 CB750 K8
« Reply #110 on: March 08, 2016, 01:45:34 PM »
That's completely lame customer service.  They may as well just send you $100 and change for a Caswell epoxy liner kit.
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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 02z06dave

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Re: Zorro's 1978 CB750 K8
« Reply #111 on: March 10, 2016, 08:16:54 AM »
maybe you should just ask them for the money to buy the liner yourself? 
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Offline knowsnothing

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Re: Zorro's 1978 CB750 K8
« Reply #112 on: March 10, 2016, 08:58:41 AM »
You are being way nice than i would have been.  They would have the tank sent back for a fix and would be sending whatever it costs to have it repainted...
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Offline SOHC4 Cafe Racer Fan

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Re: Zorro's 1978 CB750 K8
« Reply #113 on: March 10, 2016, 09:39:53 AM »
Quote from: knowsnothing on March 10, 2016, 08:58:41 AM
You are being way nice than i would have been.  They would have the tank sent back for a fix and would be sending whatever it costs to have it repainted...

Me 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 Zorro

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Re: Zorro's 1978 CB750 K8
« Reply #114 on: March 11, 2016, 07:08:11 AM »
Maybe next week's call will go a lil differently.  Thanks for the advice guys.
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Offline firebane

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Re: Zorro's 1978 CB750 K8
« Reply #115 on: March 11, 2016, 09:13:59 AM »
The problem with so many off the shelf "liner" kits is that they don't mix well with ethanol fuel. Some will last but most will fail and you end up redoing it.
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Offline SOHC4 Cafe Racer Fan

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Re: Zorro's 1978 CB750 K8
« Reply #116 on: March 11, 2016, 09:17:33 AM »
Quote from: firebane on March 11, 2016, 09:13:59 AM
The problem with so many off the shelf "liner" kits is that they don't mix well with ethanol fuel. Some will last but most will fail and you end up redoing it.

THAT is why we recommended Caswell epoxy liner!!
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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 Zorro

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Re: Zorro's 1978 CB750 K8
« Reply #117 on: March 14, 2016, 10:29:51 AM »
Quick update...
I called again today and Cheryl actually remembered me this time.  She's shipping  RedKote.  I know that's not recommended and she agreed that it's probably not the best for fiberglass and steel but she said it works really well with aluminum.

I'm not sure what to do at this point.  Take her word for it or just buy the Caswell liner.
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Offline calj737

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Re: Zorro's 1978 CB750 K8
« Reply #118 on: March 14, 2016, 10:54:40 AM »
Just buy Caswell. Tell them to keep the RedKote and use it in their tanks. Line it and be done with it/them.
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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 SOHC4 Cafe Racer Fan

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Re: Zorro's 1978 CB750 K8
« Reply #119 on: March 14, 2016, 11:57:24 AM »
I have had Redkote fail with pumpgas on a metal tank.  I would also recommend Caswell.
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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 02z06dave

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Re: Zorro's 1978 CB750 K8
« Reply #120 on: March 16, 2016, 09:52:54 AM »
Quote from: Zorro on March 14, 2016, 10:29:51 AM
Quick update...
I called again today and Cheryl actually remembered me this time.  She's shipping  RedKote.  I know that's not recommended and she agreed that it's probably not the best for fiberglass and steel but she said it works really well with aluminum.

I'm not sure what to do at this point.  Take her word for it or just buy the Caswell liner.

The tank I got from them years ago had redkote already in it when I got it.  It dissolved in the gas almost immediately. Lucky for me, the welds in mine didn't leak.
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Offline Zorro

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Re: Zorro's 1978 CB750 K8
« Reply #121 on: March 24, 2016, 05:33:32 AM »
Ok, they finally shipped me RedKote.  It was an open can that might be leftover?  Anyway, since all of you recommended the Caswell, I think I'm going to go with that.

Is this the stuff?
http://www.caswellplating.com/epoxy-gas-tank-sealer/caswell-epoxy-gas-tank-sealer-motorcycle-kit-up-to-10-gal-cans.html
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Offline calj737

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Re: Zorro's 1978 CB750 K8
« Reply #122 on: March 24, 2016, 08:43:41 AM »
That's it. I go to the Auto Paint store regularly and grab a few extra "mixing cups". I then portion the Caswell (1:2 Part A:B) by using the measuring lines on the cups. This way, I apply half the product at a time. Certainly the 10 Gal. mix is far more than you need, so I'd definitely mix 2:4 oz at a time, basically cutting the portions into 1/4s.

This way, you can focus on applying the sealer to specific areas (I do the top ((underside)) first). I let that stand for at least 8 hours, then focus on the backbone portion. Then finally the side panels. By reducing the components to multiple portions, you won't have any run-off needed to be drained through the petcock. It takes a little bit longer, but it absolutely guarantees full coverage.

You will find the sealer cures hard as a rock, and should be glossy clear when done. Before you use the entire mixture, water test the tank by filling it and check for seeping, weeping, or sweating. I have used Food Coloring in the water to aide in spotting any seepage with bare metal tanks. (Or you could use Baby Powder/Flour along the seams).
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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 Zorro

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Re: Zorro's 1978 CB750 K8
« Reply #123 on: March 28, 2016, 04:54:15 AM »
Quote from: calj737 on March 24, 2016, 08:43:41 AM
That's it. I go to the Auto Paint store regularly and grab a few extra "mixing cups". I then portion the Caswell (1:2 Part A:B) by using the measuring lines on the cups. This way, I apply half the product at a time. Certainly the 10 Gal. mix is far more than you need, so I'd definitely mix 2:4 oz at a time, basically cutting the portions into 1/4s.

This way, you can focus on applying the sealer to specific areas (I do the top ((underside)) first). I let that stand for at least 8 hours, then focus on the backbone portion. Then finally the side panels. By reducing the components to multiple portions, you won't have any run-off needed to be drained through the petcock. It takes a little bit longer, but it absolutely guarantees full coverage.

You will find the sealer cures hard as a rock, and should be glossy clear when done. Before you use the entire mixture, water test the tank by filling it and check for seeping, weeping, or sweating. I have used Food Coloring in the water to aide in spotting any seepage with bare metal tanks. (Or you could use Baby Powder/Flour along the seams).

Thanks for this!  It's great advice and seems like a fool proof way of doing things.
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Offline Zorro

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Re: Zorro's 1978 CB750 K8
« Reply #124 on: May 03, 2016, 05:31:51 AM »
It's been awhile since my last update.  Legendary finally sent me 1/2 container of RedKote to fix the leaky weld.  Thanks to the comments above,  Caswell was used instead.  Leak has yet to be water tested...stay tuned.

Speaking of leaks, the carbs had a leak and they were sent to Cycle X for a cleaning, synch, and new jets to match my velocity stacks and 4 to 1 exhaust.  I forget the gentleman's name from Cycle X but he called me once he received them.  He then gave me a complete rundown of what he was doing to them.  He gave me the warm and fuzz feeling that Legendary never did :)

Thanks carb guy from Cycle X!

Anyway, the seat pan was at the upholstery shop for a couple of months...maybe even 3.  Since it wasn't needed, who cared!?  LOL.  Anyway, when I called, I think the shop owner was a lil embarrassed (I think he forgot about it actually) and he had it ready in a week...with a discount.  So I was happy.  Came out pretty good!






Hope to have the carbs back in a week or so and 02z06dave can finally get this thing out of his garage.  Can't thank him enough!!!
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