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Suzuki MX & Off-Road Dirt Bikes
87 CR125 Resto: Q:Trouble w/ corrosion and some random questions
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[QUOTE="Uchytil, post: 1327083, member: 43803"] Be careful. I've restored a few early 80's and the galvanic action between magnesium, aluminum, and steel is probelmatic using the lesser metal as a sacrificial point (like a zinc in marine apps). The big problem is the use of tap water which contained minerals. Here's what I do: Use penetrants and heat to remove frozen bolts. Work very slowly, ie. soak parts overnight, or so, dry, and then apply heat to the outer bores. You can also try a quick quench with cold water to try and break the bond. Whatever you do work slow. The corroded parts can be cleaned by wire wheel, bead blast, etc. I use an engine type epoxy to fill in, and smooth, corroded areas in the cooling system. Use sparingly. If the damage is extensive look for newer parts. The radiators are hard to clean being thin aluminum and subject to destruction with some acid cleaners. I used mild acids like cokeacola, or vinegar with little luck. You can send them out to a shop that specilizes in these. I ended up finding a few used ones that were pretty good which was the best bet. The white powder can be cleaned up with mild acid like I mentioned but don't overdo anything. Rinse well with mild detergent. Only use distilled water and antifreeze mix. Replace the hoses if you can afford to. Good luck! Oh yeah, don't use stainless steel fasteners on the engine either. Good luck! [/QUOTE]
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Suzuki MX & Off-Road Dirt Bikes
87 CR125 Resto: Q:Trouble w/ corrosion and some random questions
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