Cleaning a rust gas tank

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scdmarx

Well-known member
Supporting Member
Joined
Dec 6, 2009
Messages
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Location
On a mountain in the Ozarks
My Bike Models
1982 Standard
Cut & Pasted from another web site. Hope I'm not violating any rules.

A friend of mine purchased a motorcycle recently, that had
been sitting a few years, and spent a lot of money at a
local bike shop getting it ready for the road. Despite
having the carburetors reconditioned, the shops failure to
properly clean the tank soon resulted in a bike that
wouldn't run above idle. I found the jet needles of both
Hitachi carbs stuck in the needle jets, and both had
detached from the diaphragm assemblies. There was a fair bit
of loose rust in both float bowls, and I was surprised by
the varnish that was still evident throughout the carbs.
Despite this, I was confident the shop had done what my
friend had paid for, and didn't criticize their work. His
budget was blown, and his wife is getting antsy about this
money pit he's bought, so...

After repairing the carbs, I removed the petcock and sending
units from the tank and taped over the holes with duct tape.
I filled the gas tank with a large coffee can full of
aquarium gravel, and wrapped the tank in a heavy blanket. I
considered using my barbeque rotisserie, but would have had
to rig a frame to do this, as it was too large to fit in the
barbeque. Even had it fit, my barbeque is sacred ground :)

My wife's dryer is not. Had she found me doing this however,
I would not be alive to tell you about the results.

Instead I placed the tank in my cement mixer, and wedged
everything in placed with enough packing that the tank
wouldn't tumble, but would only rotate. I let it run for
about 90 minutes and had a look. All of the loose rust was
gone, and in some spots, the tank looked like new inside. I
vacuumed out all of the gravel and rinsed the tank with
water, then gasoline. Put it all back together, test rode it
tonight, and it runs like a top.

His wife is happy, my wife won't have to kill me, and
they'll both miss us this weekend.

Dave Haughey
Kingston, Ontario, Canada
 
nice ron .....to me this is the way to clean a tank and if the tank is set up right and not turned to fast it wont tear up the picup screen ....i would never do some of the stuff i read about on the forums on tank cleaning but i have never injected my thoughts on how rediculess and costly some of the deals are to me
 
dan filipi":1t3ad6ib said:
I suppose that would have destroyed the pickup tube screens but that's OK I guess, got the job done.

Didn't think of that. The only tanks I ever dealt with were not GW tanks, and the only screen was removable at the petcock. On the GW I'd most likely go the seafoam route a couple times before anything else. I hope I never have that experience though.
 
scdmarx":2xt5uil4 said:
dan filipi":2xt5uil4 said:
I suppose that would have destroyed the pickup tube screens but that's OK I guess, got the job done.

Didn't think of that. The only tanks I ever dealt with were not GW tanks, and the only screen was removable at the petcock. On the GW I'd most likely go the seafoam route a couple times before anything else. I hope I never have that experience though.


I have spent my whole life maintaining things and one of my favorite sayings is:

"You don't know what you don't know!!!!
:read: :read: :swoon: :swoon:

And that is pretty much the only thing that gets you in trouble, what you don't know!!!! :smilie_happy: :smilie_happy: :smilie_happy: :smilie_happy:
 
thewhiterhino":1dhmcp00 said:
:swoon: :swoon: And that is pretty much the only thing that gets you in trouble, what you don't know!!!! :smilie_happy: :smilie_happy: :smilie_happy: :smilie_happy:

Where were you the day I met my first wife :head bang: :swoon:
 
Dave":37d15yh4 said:
thewhiterhino":37d15yh4 said:
:swoon: :swoon: And that is pretty much the only thing that gets you in trouble, what you don't know!!!! :smilie_happy: :smilie_happy: :smilie_happy: :smilie_happy:

Where were you the day I met my first wife :head bang: :swoon:


Trying to figure out what I didn't know about my first two wives... :smilie_happy: :smilie_happy: :smilie_happy: :smilie_happy:
 
When I first bought my Shadow it had set a few years and the tank was rusty also. There is a motorcycle museum close by and while talking to the owner one day I asked him about cleaning it out. When I brought it in they filled it with an acid and let it set a few days then I picked it up and had to flush it out several times. It was definately clean and the acid worked well but I never asked him what the acid was. Funny thing is it took the acid three days to work and only took 90 minutes with the cement mixer method. I could have been riding those three days. Go figure !
 
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