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Author Topic: and so it begins, cb550k under the knife  (Read 38999 times)

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Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #125 on: January 25, 2016, 03:12:26 AM »
It just seemed easier than making a stand for it?
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Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #126 on: February 04, 2016, 10:09:50 AM »
First tank side looks promising.  Hopefully I can get the other side to match.

« Last Edit: February 04, 2016, 10:13:32 AM by DMcD »
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Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #127 on: February 11, 2016, 12:12:22 PM »
Ran out of argon tacking on the first side, doh!



Good news however is that I booked the ferry for the classic TT, so I now have a target completion date!

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Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #128 on: February 12, 2016, 03:40:49 PM »
The ebay monza style cap has a breather, but I decided to make one anyway to mimic the cr750 style tanks.  Just used a few cuttings that were lying around the bench.




It looks a bit too tall, i'll trim it a bit before welding it in place.



Were the breathers this shape for a reason?  Did the have a ball valve or something inside them?
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Offline RAFster122s

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Re: and so it begins, cb550k under the knife
« Reply #129 on: February 13, 2016, 07:56:09 PM »
The pipe being open forward provides a pressurized tank (low pressure); that pressure is not significant enough to cause issues and it aids in fuel flow from the tank. The Control Line model engines would use a vertical pipe on the bottom and top and using a 45 degree angled to the line would provide low pressure to aid in fuel draw. It doesn't provide enough pressure to cause problems. It prevents the vapor lock or having a vacuum in the tank causing reduced draw as it sucks air back into the tank. Kind of like a vent to allow the bottle to empty rather than chug chug...like a 2L bottle when you up end it, it will flow liquid until it needs air to empty further and it sucks the liquid back in as it takes a gulp of air....the chug chug effect as we could euphemistically refer to it...
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Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #130 on: February 14, 2016, 03:08:44 AM »
Thanks for the advice, got the second side and rear fine tuned and tacked up last night.  Sorry if this is getting boring, but it is a slow process.

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Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #131 on: February 26, 2016, 11:36:28 AM »
Tank bottom finished, just need to join the two parts now.



Got the paint too this week, very retro
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Offline calj737

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Re: and so it begins, cb550k under the knife
« Reply #132 on: February 26, 2016, 11:40:16 AM »
Quote from: DMcD on February 26, 2016, 11:36:28 AM
...just need to join the two parts now.
"Just"... I love it when people describe the work involved in TIG welding aluminum as "just". Coronary transplants take less time  ;D I know you were self-describing and know all too well what I mean, but it just looked completely under-stated in print  ;)
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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 DMcD

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Re: and so it begins, cb550k under the knife
« Reply #133 on: February 26, 2016, 11:54:38 AM »
Very accurate observation! 
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Offline SOHC4 Cafe Racer Fan

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Re: and so it begins, cb550k under the knife
« Reply #134 on: February 26, 2016, 03:31:30 PM »
Quote from: calj737 on February 26, 2016, 11:40:16 AM
Quote from: DMcD on February 26, 2016, 11:36:28 AM
...just need to join the two parts now.
"Just"... I love it when people describe the work involved in TIG welding aluminum as "just". Coronary transplants take less time  ;D I know you were self-describing and know all too well what I mean, but it just looked completely under-stated in print  ;)

Beat me and everyone else to the loaded "just"!
If only it were that easy, aluminum race tanks would be bountiful!
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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)

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2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #135 on: March 01, 2016, 02:28:52 PM »
Tank 99% done.






If I was doing it again I would put a larger radius on a couple of the corners.
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Offline SOHC4 Cafe Racer Fan

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Re: and so it begins, cb550k under the knife
« Reply #136 on: March 01, 2016, 02:56:42 PM »
Pretty damn good for your second aluminum gas tank!
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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 DMcD

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Re: and so it begins, cb550k under the knife
« Reply #137 on: March 01, 2016, 03:07:45 PM »
Ah well, 4th tank actually, made one for a tz350a for a friend, and then one for my mates x5, that was why I wanted to make a better one for myself.
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Offline calj737

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Re: and so it begins, cb550k under the knife
« Reply #138 on: March 01, 2016, 03:17:03 PM »
It's just aluminum. Cut it, bend it, weld it. Done  ;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 Retro Rocket

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Re: and so it begins, cb550k under the knife
« Reply #139 on: March 02, 2016, 01:04:56 AM »
Quote from: calj737 on March 01, 2016, 03:17:03 PM
It's just aluminum. Cut it, bend it, weld it. Done  ;D

Smarty pants.... :P
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Offline calj737

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Re: and so it begins, cb550k under the knife
« Reply #140 on: March 02, 2016, 03:18:13 AM »
Quote from: Retro Rocket on March 02, 2016, 01:04:56 AM
Smarty pants.... :P
It was a joke from an earlier post.  ;) I think McD got it already.
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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 DMcD

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Re: and so it begins, cb550k under the knife
« Reply #141 on: March 02, 2016, 05:51:36 AM »
I'm just surprised that someone is still interested! :o
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Offline calj737

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Re: and so it begins, cb550k under the knife
« Reply #142 on: March 02, 2016, 06:27:34 AM »
Half of us are homeless waifs and the other half are still in prison. What else we going to do but live vicariously through your endeavors? ;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 bwaller

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Re: and so it begins, cb550k under the knife
« Reply #143 on: March 02, 2016, 07:30:42 AM »
That's about the truth Cal. We can only understand through pictures DMcD.  ;D

Thanks and good work.
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Offline Pan1cReaper

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Re: and so it begins, cb550k under the knife
« Reply #144 on: March 02, 2016, 09:48:56 AM »
Awesome work man. Loving all the fab work. One day I might be 10% as good.
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Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #145 on: March 02, 2016, 01:25:41 PM »
Quote from: Pan1cReaper on March 02, 2016, 09:48:56 AM
Awesome work man. Loving all the fab work. One day I might be 10% as good.


Don't underestimate your abilities, when I started this thread I had never bent a piece of aluminium, seen an english wheel, or even held a tig welder.  If I can do it, it can't be that difficult.
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Offline Pan1cReaper

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Re: and so it begins, cb550k under the knife
« Reply #146 on: March 02, 2016, 04:31:42 PM »
I like seeing "the little guy" do work like this. Of course a shop can do it, but seeing someone do it at home is really cool. Might be worth seeing if the local com college has a class. I mig all the time, have never tig welded.
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Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #147 on: March 04, 2016, 03:20:42 PM »
Second attempt at megaphones today 32X60x300.

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Offline DMcD

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Re: and so it begins, cb550k under the knife
« Reply #148 on: March 05, 2016, 07:56:40 AM »
Engine back in for exhaust fitting, got 4 metres of 32mm exhaust pipe today for £20.  Not sure whether to bend it, or pie cut and weld it?  Anybody got advice?

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Offline calj737

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Re: and so it begins, cb550k under the knife
« Reply #149 on: March 05, 2016, 08:00:24 AM »
If you have a mandrel bender, that's easiest. Or, you can go Old School and fill the pipe with foundry sand, heat it and hand bend it. Pie cuts and welding is lots more time consuming, but you can fit each pipe exactly to the layout you need.

If you opt for welding, Argon purging is highly recommended with a TIG torch  :)
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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
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