Author Topic: '75 CB550F restoration: Project Lolita  (Read 53830 times)

0 Members and 4 Guests are viewing this topic.

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,315
  • Central Texas
Re: '75 CB550F restoration: Project Lolita
« Reply #100 on: April 23, 2010, 04:48:43 AM »


[/quote]

 It might be easier/cheaper to just get a new already-chromed exhaust and then paint/powdercoat black the necessary parts.  Not sure if Mac sells just the muffler end, in lieu of a full kit.

[/quote]

Sure they do, not sure what style your looking for, but here is one:

http://www.denniskirk.com/jsp/product_catalog/Product.jsp?skuId=25565&store=Main&catId=&productId=p25659&leafCatId=&mmyId=
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline greasy j

  • lanesplitting
  • Expert
  • ****
  • Posts: 853
  • non serviam
    • Dimale Painting & Restoration
Re: '75 CB550F restoration: Project Lolita
« Reply #101 on: April 23, 2010, 09:13:30 AM »
I was just gonna say the same.

yeah, they have the other type, too.

Offline TyMatthews

  • Enthusiast
  • **
  • Posts: 103
Re: '75 CB550F restoration: Project Lolita
« Reply #102 on: April 24, 2010, 11:13:27 PM »
Day 28:

The last couple days I'd been attempting (without success) to separate the cylinder head from the block.  Tried filling the cylinders with grease and screwing in the spark plugs.  Didn't work.  Tried the wedge method; no go.  This morning I bought a can of gasket remover from my local Kragen, and sprayed the entire perimeter of the gasket quite liberally.  This stuff eats paint, so it's a good thing I'm planning on repainting everything!  The can says to wait 10-15 minutes before trying to separate them.  So I patiently waited, and then tried my luck.  DAMNIT!!

At that point I was feeling pretty low.  In my mind, I was considering which mechanic to take the god damned thing to so they could take it apart for me.  I didn't want to do anything else, even, I was so frustrated with that stupid gasket.  I decided to spray the whole thing again with the remover and then just get out of there for a while.  It was a beautiful, sunny day today in NorCal, so I went on a 60-mile ride on my FJR up and over the Berkeley hills, down around the San Pablo Dam.  Managed to ton up on my way, I was that frustrated.  Went to the store, bought some groceries for dinner, and putted around on the Internet for a while.

Finally, I decided to try again.  The gasket had been soaking for more than two hours at that point.  I brought out the metal putty knife and wedged it into an area that had been chipped away from previous efforts.  I lifted up the mallet with very little optimism and struck the end of the knife with a succinct lack of enthusiasm.  I was prepared for another effort in futility, but lo... what is this?  The knife actually moved this time?  Holy SH1T!  Suddenly I was ecstatic.  Could this be working?  I carefully moved to an adjacent spot and pounded away some more... it too gave way!  I quickly stuffed in a plastic knife to hold the tiniest of gaps that I had managed to produce, then moved to the other end to try my luck there.  A few quick blows with the mallet on the knife and this end also was free!  Sweet jesus!

I wasn't completely home free, however.  It took another 15 minutes of careful wedging and pounding with the mallet to completely break the gasket loose from its 35-year-old grip.  Had to chip away at the internal portions between the cylinders, as they too were rock solid.  Only then was I able to manage even a half-centimeter gap; it still wouldn't let loose.  I got it separated enough to stick my fingers in, then I just wrangled the fcker off the block.  I heard (and felt) the gasket tear as I did this.  I'm not sure I've ever felt a greater relief during this entire project than when I held that head in my hands for the first come, completely separate from the block. 

Now I have a ton of grease to clean up, and the remnants of that gasket to carefully scrape away.

The bane of my existence the last few days:











Tomorrow I will be heading over to Greasy's house to blast away on a number of smaller parts, then prime them for painting.  We'll see how far I can get!  Then in the evening I have a powdercoating class down at TechShop to attend, so I can start powdercoating some parts on my own.  Gotta figure out how big of a cabinet and oven they have.



Offline fastbroshi

  • Puppet
  • Old Timer
  • ******
  • Posts: 2,645
Re: '75 CB550F restoration: Project Lolita
« Reply #103 on: April 24, 2010, 11:33:29 PM »
  That's so cool they have that TechShop where you live.  When I was in the military we had an AutoHobby Shop on base where you could bring in whatever you had, be it a bike, car, truck whatever and do whatever you needed to do for cheap.  They had all the tools for us to borrow, lifts, jacks, fluids, you name it.  Save me a lot of money for sure. 
Just call me Timmaaaaay!!!

Offline TyMatthews

  • Enthusiast
  • **
  • Posts: 103
Re: '75 CB550F restoration: Project Lolita
« Reply #104 on: April 24, 2010, 11:45:08 PM »
Oh, I should also add that I've been doing my own zinc electroplating the last few days.  I tested out my electrolyte consisting of zinc chloride, ammonium chloride, and glycerol with a zinc anode from West Marine.  I chose the tools from the little toolkit under the seat.  I figure these don't need to look pretty, so if I screw them up, not a huge deal.  They had some surface rust, not horrible, so they were prime targets for rust removal and rust prevention.

Here's my procedure:

  • Wash/degrease/scrub the part using Simple Green or comparable detergent
  • Rinse thoroughly with water
  • Phosphoric acid soak until all the rust has been eaten away (~30 minutes)
  • Rinse thoroughly with water
  • Dry under air nozzle
  • Soak in caustic soda (a.k.a. sodium hydroxide) for 20 minutes
  • Rinse thoroughly with water
  • Dry under air nozzle
  • Hydrochloric acid "pickle" for 20 minutes
  • Rinse thoroughly with water
  • Wire up with steel wire, drop into electrolyte, and begin plating at 12V DC bias for 10 minutes (negative terminal to part, positive terminal to zinc anode)
  • Stop plating, and reposition part on wire to expose all surfaces
  • Continue plating for an additional 10 minutes
  • Rinse part thoroughly, wipe away an excess/loose zinc that might have accumulated

I'll post some pics of a test sample to demonstrate the efficacy of this process.  There is some fine-tuning to be done with the proper current density.  I just plated everything at the maximum current the power supply could deliver (0.72 amps).  Less current densities (amps per square centimeter of surface area) might provide a more uniform, smoother surface.  Tough to say, and would require a little investigating.  I did observe that the smoother the steel before plating, the smoother the zinc coating afterwards.  So there's something to be said for prepping your parts properly.

Note that in all cases, I rinse using the same rinsing bath in order to save all of the chemical waste.  I must channel my chemist training here and ensure that people exercise caution in terms of what can and cannot go down the drain.  Phosphoric acid, once neutralized with baking soda, is safe to be disposed of down the drain (Coca-cola contains phosphoric acid, after all).  The remaining aqueous zinc solutions I saved for proper disposal.

traveler

  • Guest
Re: '75 CB550F restoration: Project Lolita
« Reply #105 on: April 25, 2010, 09:59:15 AM »
That head gasket would have handled 20psi of boost! ;D

You mentioned chipped away portions on the head to cyl area......elaborate?  Tell me you didn't gouge it up too bad!

remember Cometic head gaskets are your friend (best out there, IMHO)

~Joe

Offline TyMatthews

  • Enthusiast
  • **
  • Posts: 103
Re: '75 CB550F restoration: Project Lolita
« Reply #106 on: April 25, 2010, 10:18:56 AM »
That head gasket would have handled 20psi of boost! ;D

That gasket would have handled a thermonuclear explosion!

You mentioned chipped away portions on the head to cyl area......elaborate?  Tell me you didn't gouge it up too bad!

remember Cometic head gaskets are your friend (best out there, IMHO)

Not chipped away portions of the head; I had to chip away at the gasket in between the cylinders because it wouldn't let loose.  And for that, I had to dig in deep with the putty knife to reach them.  After getting the bloody thing off finally, I scanned over the entire mating surface area looking for damage, and found only a couple small scratches, which aren't very deep at all.  I was very conscious the entire time of not causing any undo harm to the mating surfaces.

I bought an OEM gasket from Bikebandit to replace it, after reading a number of forum posts on here that suggested only the original Honda gasket is really suitable.

Offline Captainkirk

  • Certified bike nut
  • Enthusiast
  • **
  • Posts: 146
Re: '75 CB550F restoration: Project Lolita
« Reply #107 on: April 25, 2010, 09:02:48 PM »
Shoulda used the rope.
But then, no one listens to me... ???
It's easier to ask forgiveness than to gain permission.

Offline TyMatthews

  • Enthusiast
  • **
  • Posts: 103
Re: '75 CB550F restoration: Project Lolita
« Reply #108 on: April 25, 2010, 11:13:13 PM »
Shoulda used the rope.
But then, no one listens to me... ???

Yeah, I couldn't really follow what you were implying.  I don't think the rope would have done anything, as the engine is completely out... pulling on the top of the cylinder head just lifted the entire engine up.  I needed a way to pry them apart.

Day 29:

Spent the afternoon down at Greasy's garage, blasting away at some "internal" pieces using aluminum oxide, then priming them with some Duplicolor professional's primer.  Got through the battery box, the air cleaner cover that holds the duct, the protector plate near the coils, and the gauge mounting plate.  They cleaned up pretty well, and are now ready for a few coats of semi-gloss black.  Then it was off to TechShop down in Menlo Park for their powder coating class.  Unfortunately, their oven is 20" x 20" x 20", so there's a limit to what can be put in there.  And you have to supply your own paint mixture, which I suppose is a good thing, especially if you're going to do things in multiple stages.  With that size of an oven, I'm limited to pretty much only doing the smaller pieces.  The frame and swing arm will have to be outsourced somewhere.

On to the pics!

Battery box before...


and after blasting/priming:


Gauge mount before...



and after:



Protector plate before...



and after:



Forgot to take pics of the air cleaner mount afterwards.  Those will have to wait until the next update.

Offline Zaipai

  • I am getting closer to being an
  • Old Timer
  • ******
  • Posts: 3,400
    • My Home page
Re: '75 CB550F restoration: Project Lolita
« Reply #109 on: April 26, 2010, 05:48:13 AM »
Very nice.. I love blasting.. Too bad its so expensive around here..

Gonna try and get a small one over the summer..

Can't wait to see them painted and on the bike!

.: Scott :.
Its my Avatar..

75 CB550F  | 


Offline TyMatthews

  • Enthusiast
  • **
  • Posts: 103
Re: '75 CB550F restoration: Project Lolita
« Reply #110 on: April 27, 2010, 10:25:50 AM »
Very nice.. I love blasting.. Too bad its so expensive around here..

Gonna try and get a small one over the summer..

Can't wait to see them painted and on the bike!

Yeah, I couldn't imagine sending everything off to have it done.  And I'm hella thankful for Greasy's setup, which has worked amazingly well.  Takes me 20 minutes to ride over to his garage, and I can blast then paint a part instantly, no delay for rust set-in.

I also cannot wait to see them on the bike... hell, I can't wait to see the whole bike.  I can see it in my head, but there's a long path still before then.

Offline greasy j

  • lanesplitting
  • Expert
  • ****
  • Posts: 853
  • non serviam
    • Dimale Painting & Restoration
Re: '75 CB550F restoration: Project Lolita
« Reply #111 on: April 27, 2010, 01:06:32 PM »
are you doing the zinc plating at your house or at the tech shop?

I'd like to learn how that works...

I seriously slept in today. up late last night fixing the remaining chips in the cylinder head.
now I'm bein lazy but your progress is motivating me so I'm goin in the garage.

I'll be home for a bit if you wanna stop by. let me know...

Offline TyMatthews

  • Enthusiast
  • **
  • Posts: 103
Re: '75 CB550F restoration: Project Lolita
« Reply #112 on: April 27, 2010, 01:50:33 PM »
are you doing the zinc plating at your house or at the tech shop?

I'd like to learn how that works...

Actually doing that on campus in our fume hood... safety first!  Zinc + hydrochloric acid == lots of hydrogen gas.  Potentially explosive, need to vent it off properly, etc.  I'm going to run another batch soon.  I think there's a way for the DIY-er to run it out of the garage, assuming you can get the appropriate chemicals.  I'm working with essentially pure phosphoric and hydrochloric acids, which home users can't purchase. 

I know people do it at home... you can buy muriatic acid (a.k.a. hydrochloric acid) from some hardware stores or swimming pool supply companies, and phosphoric acid comes in a number of flavors at all kinds of places.  Ammonium chloride apparently can be found in over-the-counter dietary supplement form.  Sodium hydroxide is sold as caustic soda, and that, too, should be available locally.  Zinc anodes are available at any marine supply shop.  Glycol is a big component in anti-freeze, although the other parts in anti-freeze might be undesirable.

Then you need an inline ammeter (most voltmeters have this function), and a decent power supply that can deliver the right amperage.  There's a really neat article for converting old PC power supplies, which are built to deliver +/-12V and +/-5V DC, into DIY lab-like power supplies that can deliver sufficient current (up to an amp at -12V, depending on the wattage).  The rest is just containers and connectors.

Maybe we can try it out in the garage, and put together a detailed article for how to go about it.  The pieces I've done thus far look pretty matte, but since they're tools I don't care too much.  Some pieces came out quite shiny, and I think that was due to a better initial surface.  The electroplating process, much like painting, seems to benefit most from proper prep work on the starting material.

I seriously slept in today. up late last night fixing the remaining chips in the cylinder head.
now I'm bein lazy but your progress is motivating me so I'm goin in the garage.

I'll be home for a bit if you wanna stop by. let me know...

Well I wish I could be there this afternoon to help motivate you, but I have this parallel-tempering kinetic monte carlo simulation programming project at school to finish up.  Not to mention I just don't want to drive down there with the off-and-on rain all day today.  Five minute drives are okay, but 25 minute drives at highway speeds == not much fun.  Thinking about getting this bike done and on the road is so compelling sometimes, however!

Offline Captainkirk

  • Certified bike nut
  • Enthusiast
  • **
  • Posts: 146
Re: '75 CB550F restoration: Project Lolita
« Reply #113 on: April 29, 2010, 02:08:32 PM »
Shoulda used the rope.
But then, no one listens to me... ???

Yeah, I couldn't really follow what you were implying.  I don't think the rope would have done anything, as the engine is completely out... pulling on the top of the cylinder head just lifted the entire engine up.  I needed a way to pry them apart.


You put the rope INSIDE the combustion chamber with pistons at BDC and work the kickstart. Pistons come up, push on rope and (try to) compress it. Result; head pops loose. Try it next time; works a hell of a lot better than grease!
It's easier to ask forgiveness than to gain permission.

Offline TyMatthews

  • Enthusiast
  • **
  • Posts: 103
Re: '75 CB550F restoration: Project Lolita
« Reply #114 on: April 29, 2010, 10:44:00 PM »
Day 33:

Spent most of the evening prepping the frame for powder coating.  I found a place, Electroplating Specialties down in Hayward, that offers powder coating of motorcycle frames in addition to a number of electroplating services.  Gonna swing by there tomorrow and check them out, and hopefully get a decent estimate on how much it'd cost to get some parts chromed and the frame + swing arm powder coated.

The most difficult part of prep was getting the old bearing races out.  I'm going with the de facto tapered bearing upgrade for the steering stem (All Balls), so I figured I might as well yank out the old races now before coating so I can mask everything properly.  I used a foot-long threaded rod as a drift to carefully ping them out of their positions.  Took a lot more force than I was anticipating, but after they started moving it was pretty easy.  Just went slow and steady, working around the perimeter of the race, tapping just a little bit each time.  Took maybe 5 minutes each. 

I removed the grommets for the side cover mounts, scraped off the old stickers for "Helmet Holder" and the battery ventilation warning, then cleaned up the adhesive residue with some acetone.  I tried to cut off the rivets for the VIN plate from within the steering column (the back side of the rivet), but I was unable to free them.  I just can't get in there with anything to try and push the rivets out.  The VIN tag looks to be a thin aluminum plate, and it started to crack a bit as I was trying to wrangle the rivet off.  So I abruptly stopped and decided to rethink my options.  I want to be able to blast and powder coat the entire frame, including the bit under that stupid tag.  Does anyone make replicas for the VIN tag?  I'm not trying to change anything here, just replace what was originally on the bike with a new one.

I forgot to take pictures of the steering head with the races removed... I'll do that before shipping it off for the powder coat.  First image is the upper race, second image is the lower race.




traveler

  • Guest
Re: '75 CB550F restoration: Project Lolita
« Reply #115 on: April 30, 2010, 04:26:31 AM »
tape off the data plate, and remove the tape after powdering.

~Joe

Offline Zaipai

  • I am getting closer to being an
  • Old Timer
  • ******
  • Posts: 3,400
    • My Home page
Re: '75 CB550F restoration: Project Lolita
« Reply #116 on: April 30, 2010, 05:44:27 AM »
tape off the data plate, and remove the tape after powdering.

~Joe

Agreed! I love how frames look after powder coating.. Had the budget allowed I would have done that with mine.

.: Scott :.
Its my Avatar..

75 CB550F  | 


Offline greasy j

  • lanesplitting
  • Expert
  • ****
  • Posts: 853
  • non serviam
    • Dimale Painting & Restoration
Re: '75 CB550F restoration: Project Lolita
« Reply #117 on: April 30, 2010, 09:02:09 AM »
I start work in 5 minutes...

I'm workin on the neighbors house, gonna put up some trim and build a chicken coop that matches the house. chickens are trendy now, says Martha Stewart.  ::)

they have one that lays green eggs...

but if you need to come by I'll be around, prob be workin all weekend, but right next door. should be sunny for the next 10 days at least. so I gotta take advantage and get some exterior work done.

I got my pistons sorted last night, they're good and useable, cylinders good, too.

phew, no boring or anything, just honing a bit.

and started to get my gearbox apart...

Offline greasy j

  • lanesplitting
  • Expert
  • ****
  • Posts: 853
  • non serviam
    • Dimale Painting & Restoration
Re: '75 CB550F restoration: Project Lolita
« Reply #118 on: April 30, 2010, 09:05:12 AM »
oh, yeah about plating, I'd be into trying a home experiment. someone makes a home kit and a member has one... wanabridin maybe? I forgot.

and my mom just got me HondaMan's book for my birthday!!!!!!!

Offline TyMatthews

  • Enthusiast
  • **
  • Posts: 103
Re: '75 CB550F restoration: Project Lolita
« Reply #119 on: May 02, 2010, 01:13:07 AM »
Day 35:

Spent all afternoon/evening over at Greasy's garage working on the gas tank, prepping it for paint.  You know you've been around too much aluminum oxide when: 1) you blow your nose and your snot is completely black; and 2) you can very clearly see every hair follicle pore on your forearms.  I was wearing a dust mask the entire time, yet it still managed to sneak in there.  While I was blasting, and blasting, and blasting away on my tank, Greasy was working on another forum member's tank (don't know the name) with whom he swapped labor for a frame mod kit.  It was good fun, and a very productive evening; however... I'm still not done with it!  Stopped around 11:00 pm with about 60 square inches on the top side left to go.  Tomorrow it'll be entirely back to raw metal.

Now that I have access to a powder coat set up that I can use on my own, I ordered a number of small "test" bottles of various metallic/silver/aluminum-like colors that I want to test for possible frame colors.  I'll throw each of them down on some scrap pieces of both aluminum and steel and see how they look.  I can't do the frame on my own, but I can at least figure out what powder to give the place that will be doing it (didn't like the only silver color they stocked).  I also bought a test bottle of some gloss black and will hit up one of my internal metal pieces to see how it looks.  I've decided to powder coat everything I possibly can in lieu of paint, and if I can do it myself for $25 in material cost, why not?  After taking the class to learn how, it's super simple and extremely fast.  Few minutes to coat, 25 to cure, 10 minutes to cool off, and you're done.  Add 15 minutes to sand blast, and you could turn around a single part from rusty hunk of crap to beautiful shiny powder-coated black in less than an hour.  I have all my parts essentially ready to go right now, so a single month's worth of membership to the TechShop ($75 student price) will suffice to get it all done.  Probably three or four sessions would be enough.

This post is not finished unless replete with some pics, so here are the final shots of the tank in its old form, that royal blue painted over the flake sunrise orange.  These were taken just minutes before entering the chamber of DOOM:



Used gorilla duct tape (or something like that) to seal off both the petcock and the inlet:



Offline Zaipai

  • I am getting closer to being an
  • Old Timer
  • ******
  • Posts: 3,400
    • My Home page
Re: '75 CB550F restoration: Project Lolita
« Reply #120 on: May 02, 2010, 07:51:06 AM »
Nice, I would love to have access to a powder coat process. However for now its not an option. Sounds like you need a better mask? Sounds like a much better way of doing it then stripping the paint by hand and sanding it out..
Can't wait to see the final product..

.: Scott :.
Its my Avatar..

75 CB550F  | 


traveler

  • Guest
Re: '75 CB550F restoration: Project Lolita
« Reply #121 on: May 02, 2010, 08:17:41 AM »
There's a powdercoating place in Colorado Springs, that can powder coat your gas tank etc.....alot of places can do that, I know, but they can mask off stripes, flames, you name it!  when they're done it looks just like paint....very little if any orange peel or anything.

For dents, I believe there is a bondo that can withstand the powdercoating heat process.

Just wanted to throw that out there!

Bike looks great Ty.....keep up the good work!

(make sure you clean the carbs before you put on....save yourself the hassle!)

~Joe

Offline TyMatthews

  • Enthusiast
  • **
  • Posts: 103
Re: '75 CB550F restoration: Project Lolita
« Reply #122 on: May 03, 2010, 01:34:36 AM »
Nice, I would love to have access to a powder coat process. However for now its not an option. Sounds like you need a better mask? Sounds like a much better way of doing it then stripping the paint by hand and sanding it out..
Can't wait to see the final product..

Well, I'm going to be paying for at least one month of membership fees, and will likely have a lot of powder and time left over before I'm done.  So if you had something you wanted to be coated, I don't mind doing it along with my own stuff.  Hell, anyone who wants some stuff done, give me a buzz.  Obviously colors will be limited to what I'm using, unless you want to buy some new media to send with your part (Columbia Coatings ships stuff hella fast).  Clearly I'll be doing a lot of gloss black, so I'll be buying a sizable amount of that.  I am a complete novice at this stage, so don't send me your gas tank expecting showroom quality powder coating... but it's not rocket science, and I think I can hit up a battery box pretty well!  Maybe we can trade services on something.  There's a lot of stuff I don't mind farming out to someone who knows what they're doing, if I can do some part myself in exchange instead of having to pay for it.  Win-win!

I think the problem with the mask was it just wasn't flush against my skin completely, particularly around the bridge of my nose.  So dust crept in there.  Plus, the cabinet wasn't sealing 100%, and way more dust was shooting out than normal. 

I also can't wait to see it finished!

There's a powdercoating place in Colorado Springs, that can powder coat your gas tank etc.....alot of places can do that, I know, but they can mask off stripes, flames, you name it!  when they're done it looks just like paint....very little if any orange peel or anything.

Not a bad idea, but I want to paint my side covers, fenders, and maybe a few other small parts.  The side covers for sure won't withstand the high temps, and if everything is to match it has to be the same process.  Plus, you have to accept whatever colors a particular powder company offers; there's no way to get a custom color done.  There's far too much work involved in getting a single batch made that it's just not worth it for them to invest all the time and effort to get a specific color matched.  So if you don't like what you have available, you're SOL.

For dents, I believe there is a bondo that can withstand the powdercoating heat process.

Just wanted to throw that out there!

I would definitely be interested in that.  Do you know the brand name?  Greasy and I were just talking about that this evening.

Bike looks great Ty.....keep up the good work!

(make sure you clean the carbs before you put on....save yourself the hassle!)

Thanks!  And I sure will clean those carbs.  I'll sonicate them in some carb cleaner for a while and really get them like-new.  Tyler, the PO who's a forum member here, had done some carb work on the bike previously, and they look to be in really good shape.  Some rust on the long rod thing (sorry, it's late, I'm too tired to look up the name) but it's not egregious.  It will all need a thorough cleaning and de-rusting.

Day 36:
On Friday I stopped by this place in Hayward named High Lustre Chrome Plating.  They do... wait for it... chrome plating!  I left them my tach and speedo covers, along with the starter cover for an estimate to re-chrome.  Those are the only parts that I know for sure that I want to have re-done.  The shifter arm, kick starter, rear brake pedal, and footrests I'm planning on powder coating to match the frame, once I figure out what color to use.  The only other part would be the headlight rim, which I can buy from BikeBandit for $52, which is cheaper than having someone do it.  Too much damn labor.  I got a quote from one guy in Oakland for $85 just for that part alone.  At any rate, High Lustre specializes in Harley parts, and has this cool core exchange program going on.  Bring them your old part that needs chroming, and you can just take one that's already done right away out the door.  Fabulous idea.  Of course, you don't get the original back; you're getting one from some other bike, so for purists maybe it's not ideal. 

I was able to get the entire tank blasted today, top and bottom, after another 3 hours of work.  I think that's what it was... hard to tell, the hours flew by.  You sort of get lost in thought while blasting away; there's not much else to do mentally.  The bottom was much easier to blast off than the top.  Must have been no clear coat, or something like that.  It came off really quickly with the aluminum oxide.  Had some issues around the seams on the very edges, as I couldn't see inside the cabinet very well and thus couldn't tell whether I'd gotten all of it out.  Came out sufficiently clean, though. 

With Greasy's help and guidance, I then carefully air dried it, wiped it down with tack cloth, lightly used a water-based cleaner to remove any trace bits of Al2O3, then air dried again.  Put some EverCoat Lite Weight body filler over the handful of small depressions and low-spots (amazingly, after 35 years, the most serious problem with the tank was a very minor 2" crease in the front left corner), let it dry for an hour or so, then sanded it all down by hand with a block and some 220 grit paper, also with Greasy's help and advice.  Spent a good half-hour sanding around the gas cap hole after removing the duct tape used to keep out all the Al2O3.   A good paint job is all in the prep, right?  Another round of dusting it off, tacking, water cleaning, more drying, and it was ready for the first coat of primer.  Used Duplicolor Professional's primer again... a full can of it, in fact.  Hit the bottom side first, let it dry for 15 minutes (it dries almost before your eyes, but I wanted to be sure), then did the top and let it all dry for maybe a half hour.  After inspection, it's apparent that I missed a couple tiny low spots on the surface during my hunt to use up the body filler.  Damn.  No worries, though, as Greasy assures me that we can use some lacquer putty to fill them in and sand it on down.  They're very tiny, and only showed up with the black primer under careful inspection.  Must.  Be.  Perfect.

Left Greasy's at 11:45, just in time to take a quick shower, post an update, and then go to bed!  Pics will be forthcoming; I forgot my camera at home before leaving, so they're on Greasy's camera.

traveler

  • Guest
Re: '75 CB550F restoration: Project Lolita
« Reply #123 on: May 03, 2010, 04:21:12 AM »
Yes.....pics please! ;D

~Joe

Offline Zaipai

  • I am getting closer to being an
  • Old Timer
  • ******
  • Posts: 3,400
    • My Home page
Re: '75 CB550F restoration: Project Lolita
« Reply #124 on: May 03, 2010, 05:37:23 AM »
Wow that is a lot going on for you. I am almost done putting my bike back together and at this point I am itching to get it back on the road, as its the only bike I have and weather has been fantastic. So tearing parts down now to powdercoat (even for almost free) is not a option but I appreciate the offer!..

Quote
Not a bad idea, but I want to paint my side covers, fenders, and maybe a few other small parts.  The side covers for sure won't withstand the high temps, and if everything is to match it has to be the same process.  Plus, you have to accept whatever colors a particular powder company offers; there's no way to get a custom color done.  There's far too much work involved in getting a single batch made that it's just not worth it for them to invest all the time and effort to get a specific color matched.  So if you don't like what you have available, you're SOL.
Correct me if I am wrong, as I don't know much about powder coating, however the side covers can't be done because they are metal correct? So even if they could take the heat the paint cant stick because no charge can be run thru the plastic...

Can't wait to see the tank when you finish it..

.: Scott :.
Its my Avatar..

75 CB550F  |