The New And Improved Unofficial R65 Forum V2
Technical Discussion => Discussion about "Lesser" makes, er, Non-BMW ;-) => Topic started by: Hardgravity on March 06, 2013, 05:25:39 AM
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On the bench at the rear of my hut sits a, dare I say this, Yamaha.
It was stripped and 'dry' stored 25 years ago, now on inspection I find that the carbs are solid.
Anybody any ideas on how to free them that won't cost a fortune?
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Soak them in carb cleaner for a while .
I've used lacquer thinner on carbs cleans them up, if you can't find anything but aerosol carb cleaner .
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A little love with some PB Blaster might be another option.
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a big Hammer!!!!
or any of the above
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I've used aluminum cleaner, something like PB Blaster, and heat and cold. Use a heat gun and warm it up, spray it, tap gently, wiggle, cool it down, and start all over again.
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Use caution when it comes to force. Some carb bodies are aluminum, but many of the older ones, Triumph & BSA come to mind, used zinc, a much softer metal. Zinc is easily deformed and you could irreparably damage the carb.
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I just remembered this...
My late father bought a Farmall Cub tractor that had been kept outside without an exhaust flap on the vertical exhaust pipe. Little engine was rusted up and would not turn over.
Trailered it to the Massey-Ferguson shop in town where an older and well-experienced mechanic removed the flat head and poured Coca-Cola into the cylinders. Few days later, the engine was free enough to crank. Cleaned out the sump, bolted the head back on and mowed pasture for many years.
As a class science project in grade school, we kept a piece of steak in the Frigidaire with a daily top up of Coca-Cola on the meat. The drink eventually ate a hole clear through the raw meat. Dazzled my little pea brain, it did. Became a "Pepper" after that. ::)
Maybe soak the carbs in Coke. Simple. Kinda like our BMW "tractors" ;D
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It's the (I believe this is the right element) phosphoric acid in coke that does all the rust eating work. Another similar method (but it's very slow) is to soak rusted up stuff in a mixture of water and sulphered molasses... the kind used for livestock feed, not cookies. The molasses process is called "chelating." Just gotta be careful with acids and metals... some of em don't play nicely.
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I just remembered this...
My late father bought a Farmall Cub tractor that had been kept outside without an exhaust flap on the vertical exhaust pipe. Little engine was rusted up and would not turn over.
Trailered it to the Massey-Ferguson shop in town where an older and well-experienced mechanic removed the flat head and poured Coca-Cola into the cylinders. Few days later, the engine was free enough to crank. Cleaned out the sump, bolted the head back on and mowed pasture for many years.
As a class science project in grade school, we kept a piece of steak in the Frigidaire with a daily top up of Coca-Cola on the meat. The drink eventually ate a hole clear through the raw meat. Dazzled my little pea brain, it did. Became a "Pepper" after that. ::)
Maybe soak the carbs in Coke. Simple. Kinda like our BMW "tractors" ;D
I'm in no rush and carb cleaner is one thought.
But Coke, now that's something to try.
It'll be cheaper and, as I don't like the stuff,not a waste! ::)
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Well it worked.
2 weeks sitting in 'the real thing' and a rinse in WD40 and I have a set of free carbs.
It's beginning to look like I may have a fighting chance of putting the old RD400 back together and getting it runnin! :)
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"I'd like to buy the world a Coke... and keep carbs in harmony...." :D
OK. Couldn't resist the old hippy, why can't we all just get along, commercial.
Nicely played, HardGravity.
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Congrats!
I might have my hands on an rd200 soon. Got a now-ex who I've planned to fix it up for. I might pique your brain about your experience with it if that's alright.
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Just think about what that Coke is doing to your own plumbing. I'll stick to long necks.
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Just think about what that Coke is doing to your own plumbing. I'll stick to long necks.
To treat any indoor plumbing issues, I always blend an equal amount of "medicinal" alcohol with the Coke... usually a nice rum with a twist of lime thrown in. Cuba Libre! [smiley=beer.gif]
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Thank heavens that the "new" Coke still contains a fair amount of phosphoric acid!
Why their marketing peeps won't consider advertising the product as a general purpose rust remover, I don't know...
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To close this topic off here's a picture of the complete bike, back on the road and all legal after a 20 odd year break.
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fi397.photobucket.com%2Falbums%2Fpp51%2Fhardgravity%2FIMGP1122C.jpg&hash=3d875a0f7411da4536ef533817f5054686f20444)
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Now THAT'S the Real Thing.
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As a class science project in grade school, we kept a piece of steak in the Frigidaire with a daily top up of Coca-Cola on the meat. The drink eventually ate a hole clear through the raw meat. Dazzled my little pea brain, it did. Became a "Pepper" after that.
You never tried the experiment with Dr. Pepper?
Are you afraid of what you would find?
I remember my Dad pouring Coke on corroded battery terminals in the family cars.
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Now THAT'S the Real Thing.
..and she's still going strong after a mild but wet winter.
Recently I've gone down size and bought a couple of Motobecane Mobylettes, but that's another story... ;)
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That is a nice looking RD - I've often wanted to find a way to tuck on of those into my garage also, but I think I've reached my spousal limit on motorcycles in the garage
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The ' active ' ingredient in Coke, is phosphoric acid, a very effective rust remover .
Think about that the next time you comsume Coke !!!!!
Great looking RD !!!
I was considering two bikes when I first got into motorcycling, a '79 RD400 Daytona Special and a '79 Yamaha XS400 .
That RD sure looked good in the dealer showroom !!!!!
The XS400 was my final choice, seemed to be more ' practical ' for a first bike choice . ;D ;D
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This is a picture of Diet coke going into my gas tank. It has been sitting there for a week or so, I will let it sit for another couple of days and then I hope to shake all that stuff loose. Hopefully I can confirm that coke is awesome.
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Vinegar will do a great job of derusting a fuel tank, just takes about 2 weeks get it clean if the tank is really rusty .
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Isn't phosphoric acid in all pop?
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Pretty much !!!!!
When Hazardous Materials clssification of products first came out, due to the low ph of Coke, it was considered HAZMAT !!!!
They changed the limits of this shortly afterwards .
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I cleaned the Coke out of the gas tank, the rust was still on the metal. Then I poured in considerable amount of Caustic Soda to neutralize the acid and Voila - the soda mixed with water took all the rust away. I just poured orange liquid out of the tank and it was done. Nice and clean result, shiny from the inside.
Coke sat in the tank for 2 weeks.
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There are such great tips on this forum!! As my R65LS LRB has not moved all summer as I break in the new to me Suzuki DR650SE '08, I had better remember this. It has been my experience with most all vehicles that sitting still in storage is usually fraught with "getting even" tactics on the bike's part!
I think I need a drink...hmmm.rum and coke?! :-/