Yeah, that's why I went with new. Easier to source, but they bring their own hassles (see "this thread").
The repair kit from Dime City / Mike's XS is part # 20-0014. New filters for the stand tubes are part # 20-6419 (set of two filters). The petcock is super easy to rebuild. I used a soft bristle wire brush to clean up any oxidation / deposits from behind the rubber valve disc, then made sure the sealing face of the turn valve was clean, flat and smooth (make sure there are no sharp edges around the passage channel). The original valve disc that was in the petcock that I rebuilt was black in color - indicating it was probably a nitrile / buna material. The replacement in the kit was a reddish - maroon color, indicating that it was probably viton or variant thereof, which should give longer service life. There is a screen and plug in the valve body that are easy to remove and clean - overall rebuild of this manual petcock is a very simple task. I did add a wire clamp to each prefilter so they would stay on the pickup tubes - they are made of nylon or similar material, which does not have good elastomeric memory, and I found mine floating loose in the tank after they had slipped off the stand pipes. I wound some stainless steel wire around the threads of a bolt (I don't recall exactly whether it was a 5/16-18 or 1/4-20) - then clipped a couple of windings and fit them around the lower part of the filter - had to work them over the plastic, but the result was a tight fit over the standpipes.
I use Parker O Lube on that sealing disc and o'ring liberally. 3K miles on my rebuild of said petcock and it's still buttery smooth. I hypothesize that dielectric grease may do the job as a substitute, but I have no need to try it.
I used that thread to learn about the vacuum petcock on my '80SG. Rebuilt it about 5 yrs ago. Still working fine.
Found it. All the way back in 2012.
This is it.
What about the seal only. Not the whole rebuild kit?
Good luck with that one.
I use this product regularly to dress new gaskets (one side only) and will use it as recommended on the screws. I just cleaned my tank and I need to rebuild the petcocks. I’ve ordered the parts and should have them mid week. When I removed the petcocks I observed the po had smeared a very light coat of some red RTV on the oring sealing surface. The petcocks were mounted right against the painted surface. When I reinstall them should I be sanding the paint off to bare metal to ensure a better seal? The petcocks never leaked a bit since I’ve owned the bike. I’ve read posts that I should be lubing the oring. Would it be taboo to put a light smear of Hylomar on the sealing surface?
I was afraid you’d recommend the bare metal but I agree it’s probably best to do that . I’ll start sanding today. Is the superglue necessary or can I just use touch up paint?
I never thought about contamination of the inside of the tank while cleaning off the paint. Sheesh, nothing is simple.
