CB350 Built by a teen (Weld Now, Grind Later)

The_Beave

The Red Tape Avenger
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

Hmmmm . . . that reminds me, I need to put up a post on what I'm doing to MBs bike, which should be finished for my part next week. heh heh heh
 

bradj

Over 1,000 Posts
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Re: CB350 Built by a teen (Weird Pipes) It's the little things...

Good to hear your clean

Sent from my PB99400 using Tapatalk 2
 

VonYinzer

Over 10,000 Posts
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

Ohhhh... VonKirk... Google Longhorns post. Word for word.
 

SONICJK

Reminds me of...me No, I'm sure of it. I hate him
CB350 Built by a teen (Weird Pipes) It's the little things...

Von Kirk 75 dt250 said:
Same way mike hahah, imma punk rock psychobilly greaser.

Diggin the bike dude, came a looooong way since it was a purply stock honda.

Greatest post ever.
Ever.
Ever.
 

oxford

Active Member
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

The_Beave said:
FINALLY! I got a better than a dang cell phone pic! LOL!

getting_better.JPG


The weld on the megaphone on the left was the last weld I did in that pic. I'm finally getting the hang of this thin gauge stuff. =)

If you are needing filler rod on thin gauge sheet you need to take the time to get a better fit up. That could have and probably should have been completed by fusion only with maybe a dab of filler where corners meet. It looks like you are using an inverter machine, using the pulse feature on it will also help with thin sheet. I am not sure if it was mentioned, were you back purging the stainless tube when it was welded?
 

bradj

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Re: CB350 Built by a teen (Weird Pipes) It's the little things...

oxford said:
If you are needing filler rod on thin gauge sheet you need to take the time to get a better fit up. That could have and probably should have been completed by fusion only with maybe a dab of filler where corners meet. It looks like you are using an inverter machine, using the pulse feature on it will also help with thin sheet. I am not sure if it was mentioned, were you back purging the stainless tube when it was welded?
haha god himself could run a stringer and somebody on dtt would say it sucked. Ha an entire web site of experts. You to cold no wait your to hot your long arc you tung neets cleaned bla bla bla
 

The_Beave

The Red Tape Avenger
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

oxford said:
If you are needing filler rod on thin gauge sheet you need to take the time to get a better fit up. That could have and probably should have been completed by fusion only with maybe a dab of filler where corners meet. It looks like you are using an inverter machine, using the pulse feature on it will also help with thin sheet. I am not sure if it was mentioned, were you back purging the stainless tube when it was welded?

Heh. Autogenous welds are not something I am going to do. I do know a thing or three about fitup. A friend of mine who I know is qualified to critique my TIG welds said I am using filler that is too thick, and now that I think about it, he's right. (He's working at a nuclear power plant and has passed 8/10 x-ray certs where most guys at that plant pass 4.) I do have a lot to learn, and much to improve. I've never done much TIG tube welding before and I am learning as I go an continually improving, which will be seen soon enough. I've elected to not post non motorcycle stuff in this thread since it upset some of the locals and the fact that this thread is already crazy. Lol!

It is an inverter machine. I am using the pulser correctly, though I am playing with the settings for various materials.

As to the question of if I backpurge stainless, I think this will answer the question better than anything else:

chaos_and_new_stuff_05.jpg


I didn't have the bottle T before, but I was using the valved Y, like a majority of the pipe welders on the planet use. I got the T because it is easier for me to control the purge flow and torch flow, which will lead to gas savings, and I try to be as frugal as possible. I am still working on my purge setup as I could use some diffusers, but, it works well for what I do. Cheers!
 

oxford

Active Member
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

That is a pretty nice purge setup. If you keep an eye out on CL sometimes you can find bottles for prety cheap. My local welding supply will exchange a bottle that had a different type of gas for whatever you want so it really broadens the search when looking for bottles. If you are not running one you can look for a glass lens setup for your torch. I have not used one yet but will when I get TIG setup a the house. Guys I know that are running are reporting using around 7CHF for argon flow which will really help stretch out a bottle.

You really should mess around with just fusion for the thin metal on the pipes, there really isn't a need to be adding filler. It can actually hurt sometimes if the material is thin enough and you are trying to sink it in on a long seam, it want to start and warp it with the added heat.
 

Rocan

"Long after I rest, my steel will live on"
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

Heres pics of the headlight bucket. The first one shows the bit I had to fix (cut away the broken edge, sanded the piece flat, then fiberglassed and added resin to raise the edge).

_DSC0004.jpg


After this I added some filler to the headlight in the places it needed it, then sprayed on 3 coats of primer.

_DSC0007.jpg



It will need a good bit of sanding, but is already a massive improvement from how it was before.
 

HerrDeacon

Over 1,000 Posts
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

David, is that a stock CB350 bucket? The reason I ask is its different than mine (also a '72). Mine is more spherical, doesn't have that bump in the back and has cutouts for the forks. I thought mine was stock, but now I'm not sure. Not that it matters to me, but just curious. I'm hoping to paint mine shortly as well.
 

Rocan

"Long after I rest, my steel will live on"
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

HerrDeacon said:
David, is that a stock CB350 bucket? The reason I ask is its different than mine (also a '72). Mine is more spherical, doesn't have that bump in the back and has cutouts for the forks. I thought mine was stock, but now I'm not sure. Not that it matters to me, but just curious. I'm hoping to paint mine shortly as well.

Nope. It's a 7" bulb and a good bit bigger in size than the stock cb350 model. Markings on it makes me want to believe its from one honda or another (found a part number that began with HM). I picked it up with the chrome trim and original (nonworking) bulb for 5 bucks. Replacing the bulb with an H4 halogen unit from DCC.


Just sanded and put on another 2 coats of primer. its going to need some more sanding before its ready for top coat.
 

HerrDeacon

Over 1,000 Posts
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

Oh ok, thanks. I'll be going with a 7" as well on mine from an XS. Using the 350 bucket on my MB5.
 

The_Beave

The Red Tape Avenger
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

oxford said:
That is a pretty nice purge setup. If you keep an eye out on CL sometimes you can find bottles for prety cheap. My local welding supply will exchange a bottle that had a different type of gas for whatever you want so it really broadens the search when looking for bottles. If you are not running one you can look for a glass lens setup for your torch. I have not used one yet but will when I get TIG setup a the house. Guys I know that are running are reporting using around 7CHF for argon flow which will really help stretch out a bottle.

You really should mess around with just fusion for the thin metal on the pipes, there really isn't a need to be adding filler. It can actually hurt sometimes if the material is thin enough and you are trying to sink it in on a long seam, it want to start and warp it with the added heat.

Thank you. My current bottle supplier only takes their own bottles. I live in litigation central (NYC/Nothern NJ), so insurance prohibits unknown bottle exchanges without a re-cert fee which costs more than a bottle fill.

I already have a pyrex cup with a gas lense system. It does cut down on gas usage, but that wasn't my primary motivation for going with that setup. It REALLY allows you to extend the tungsten out to get into joints that would otherwise be very prohibitive to weld without a good shielding blanket.

I'll agree to disagree with you on not needing filler, at least with the material I am working with which has been no thinner than 18g (for the cones or 16G for the pipes). That isn't thin by my definition. (20g stainless is thin, and something I would attempt to weld autogenously.) Proper tacking prevents any warping that would be otherwise unacceptable. Yes, metal moves when it heats up, but if it is locked together well with enough tacks, the whole thing moves together, mostly uniformly. This is especially seen in aluminum, which I am very good with, but isn't much of an issue with mild steel. Proper fitup for stainless is essential to prevent warping because of the particular properties of stainless: typically the HAZ (Heat Affected Zone) is 3x smaller due to the insulating properties of stainless, which leads to 3x more HAZ growth in 3x less distance, which DOES lead to sometimes huge distortions if that is not taken into account when doing the fitup and tacking of the pieces to be welded.
 

Rocan

"Long after I rest, my steel will live on"
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

I'll just leave this here....

Fuel%20Caps%20and%20bungs%203-17.jpg


:)

Got two coats of paint on the headlight bucket today after doing some final sanding and a last coat of primer. Then got sidetracked with school stuff, as well as went to look at a gs700 basket case at works engineering, so I will have to finish it up tomorrow night after work.

Started planning on the next stage of welding greatness... the tank. If anyone knows where to get those aluminum bungs+filler caps for less then 30 bucks a piece, it would be super helpful.

Also got a quote on sandblast + primer on the frame, and it's right at what I was willing to pay; 150 bucks. not worth it doing it myself, as I'd probably wear through at least 50 bucks worth of sand and the time spent cleaning would not be conducive to a speedy finale whatsoever.

Thats all for now. work early in the morning
 

The_Beave

The Red Tape Avenger
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

$150 is a really good price for a frame blast around your parts, I think. One of these days, I will have an air compressor big enough to blast anything.

You don't use all that much sand, as long as you can reclaim it. There are certain cases where you don't want to use reclaimed sand, but a frame that is getting blasted isn't really going to matter too much as long as afterwards the frame gets thoroughly cleaned and THEN wiped down with acetone before paint.

What kind of primer would be applied? I am a HUUUUUUUUUUUUUUGE fan of acid etching primer as a basecoat on metals, though for a nice finish on top of it, you SHOULD spray a sealer over it, which is something I like to do for anything that is going to have a "good" final coat of paint. Between the primer and sealer, pretty much all your sanding and smoothing should be taken care of and it shouldn't take much at all to get a really good finish on the whole frame.

I take it powdercoating the frame is out of the budget?
 

Ringo

Over 1,000 Posts
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Re: CB350 Built by a teen (Weird Pipes) It's the little things...

Actually, I think it'd cost you about $3-4 worth of sand to do a frame. ;). It's glass bead that's expensive...
 

Rocan

"Long after I rest, my steel will live on"
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

hehe.... the blast place is actually around your parts, beave!

Ringo, you know what i mean, haha. I wouldn't be able to reclaim most of it as I don't have a way of making a blast booth big enough to fit my frame without taking up most of my work space.


Powder would be nice, but I'm against it because paint is easier to fix if it gets scratched or chipped, not to mention the cost.
 

JRK5892

Over 1,000 Posts
Re: CB350 Built by a teen (Weird Pipes) It's the little things...

powder is paint... fixing issues is just as easy as any paint... but if your having issues your powdercoater sucked
 

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