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Fork fluid corrosive or not? Good or bad fork seal

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gkmaia

Fork fluid corrosive or not? Good or bad fork seal

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TOOLS1

Re: Fork fluid corrosive or not?

Administrator

I would not use the Bike Master. However the others are pretty good. As for fork oil, Honda's use Automatic Transmission Fluid in the forks. I will often smear a very thin coat of RTV silicone where the seals go into the forks before installing them. This helps the seals slide in, and keeps them from sticking to the tubes, and letting them come out easier when it is time to change them again. I'm sure it also will help them seal.
TOOLS

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1976 CB 750-A X 2
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gkmaia

Re: Fork fluid corrosive or not?

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sgtslag

Re: Fork fluid corrosive or not?

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In reply to this post by TOOLS1

Tools, did you mean silicone lubricant, or Room Temperature Vulcanising silicone (silicone rubber sealant)? I could see using both, but they would behave very differently.

gkmaia: Fork Oil, used by many M/C makers, is a highly refined, highly stabilized mineral oil, unless you use a synthetic Fork Oil. None of them, including ATF (also highly refined, highly stabilized), are corrosive -- they are all petroleum oil products, anti-corrosive. Cheers!

1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII

TOOLS1

Re: Fork fluid corrosive or not?

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I was referring to the RTV (room temperature vulcanizing) silicone. If you check out my build thread "My Buddies POW/MIA bike I have a tutorial on changing fork seals in it, and show using the RTV silicone.
TOOLS

gkmaia

Re: Fork fluid corrosive or not?

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