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Discussion Starter · #1 ·
I'm redoing the brakes on my 86 trx350 and I wanted to know if it's really neccesary to hone the wheel cylinders. I have all four wheel cylinders off the bike (The owner before me lost the cap and diapragm off the master cylinder so the lines were contaminated with water). So far I've cleaned up both cylinders on the left side and there was no rust to be found, just gunk from the open resevoir. None of the four cylinders were leaking into the brake drum and as far as I can tell all seals are in good shape. So I'm thinking that all I need to do is finish cleaning up the right side, clean out the lines and remount. Am I asking for trouble doing this? Parts are notoriously hard to find for these bikes and I'd like to keep the cost to a minimum. All comments and opinions welcome.
 

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Sounds clean enough to me.I wouldn't bother.
 

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Discussion Starter · #5 ·
Alright, I'll pick up a hone today. Got a few more questions though. Most of the rubber parts are still good but 2 of the piston seals have scratches in their surface. They arent cut or anything they just have superficial scratches on the outside that contacts the cylinder wall. Do you thing that these scratches would cause brake fluid to leak past the piston? I've been searching for parts and the shipping charges alone to get anything from bikebandit would be approx $60. Also one of the wheel cylinder boots has a tear in it, I know this is gonna be a problem but I was thinking I could just pack under the boot with grease until I can get some new parts. Any thoughts?
 

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Alright, I'll pick up a hone today. Got a few more questions though. Most of the rubber parts are still good but 2 of the piston seals have scratches in their surface. They arent cut or anything they just have superficial scratches on the outside that contacts the cylinder wall. Do you thing that these scratches would cause brake fluid to leak past the piston? I've been searching for parts and the shipping charges alone to get anything from bikebandit would be approx $60. Also one of the wheel cylinder boots has a tear in it, I know this is gonna be a problem but I was thinking I could just pack under the boot with grease until I can get some new parts. Any thoughts?
I don't really know what to tell you about the scratches in the seals. You'll probably just have to try it and see if it leaks. I know that isn't much help, but I don't know what else to tell you.

As for the dust boot, I wonder if you could seal the tear with some silicone?
 

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I would try a dab of seam sealer instead it will remain somewhat plyable too and more durable. Seam sealer is available at an auto body supply store, it's used to put inbetween body joints like where the roof and rear quarters are put on a vehicle also where the inside lip of a dooor is.
 

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Discussion Starter · #9 ·
Lol, I work in a body shop and I've got a tube of seam sealer in my toolbox at work. Once again I didnt think of that. I guess I just thought the boot was more important than it is. Thanks for the inspiration :)
 

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Yeah, that boot is just to keep dirt from getting to the seal area.
 
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