1972 Yamaha XS650 project

Question about re-installing the petcocks. I cleaned and have new rubber gaskets. When I removed the old gaskets there appeared to be a small amount of gasket sealer on them. See pic below. What do peeps recommend - gasket sealer or no gasket sealer?
 

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I bought some F10024 Purolator filters. See pics. Way to fn big. Suggestions?
 

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I bought some F10024 Purolator filters. See pics. Way to fn big. Suggestions?

The space under the tank and around the carburetors is really tight. You might have difficulty finding a place to fit them. My first attempt was some clear fuel line made by Emgo, with these clear box filters,
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But everything about that set up was too bulky. The fuel lines were real thick and stiff and the filters were too big to easily find space for. I finally settled on Tygon fuel line and small cone filters, the Tygon is much skinnier and very flexible and the cone filters fit better too.
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Update - Success! and Failure! I rolled the bike out of the basement today (with help of course). I installed recently charged battery and inflated tires to specs. See pic of bike! Time to put gas in it and start it up. It took awhile, but it fired up and idled nicely. What wasn't so nice was the oil leaking (heavily) from the side cover over the oil filter. See pics with gasket side one and side two. When I reassembled I cleaned both side of round cover and side case so surfaces were smooth. When I installed new gasket I applied gasket sealer to both sides. A washer was missing on one of the two allen bolts. I didn't that would be an issue. See pic. I was quite surprised it leaked and even more surprised at how much it leaked. Please school me. Thanks.
 

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Blue goo is not your friend. Should not need it. No washer is called for under the bolt. I use red grease on my gasket on my XS2. Make sure everything is spotless and the bolts are no longer than 20mm.
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No, you shouldn't have/need copper washers on the two Allen screws, they're not called for. I know you often find them on these screws, but they are not needed. I don't use them and I've had no leaks there ever. Is that silicone gasket sealer you gooped all over? If so, someone should slap you, lol. As mentioned, no sealer on that gasket. I just oil mine, some grease it. No leaks on mine since I put it in service (2005). I've rarely changed that gasket either, maybe once.

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Hate to be that guy but those filters are on there bass ackwards. Coney side goes toward source. should be a flow arrow on there. the large volume is for junk storage. If you got junk in your tank, those will fill up pretty quick and stop flowing if you run'em like that.

:twocents:

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Hate to be that guy but those filters are on there bass ackwards. Coney side goes toward source. should be a flow arrow on there. the large volume is for junk storage. If you got junk in your tank, those will fill up pretty quick and stop flowing if you run'em like that.

:twocents:

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Ha! You made me doubt myself! I see what you’re saying and that sounds logical. They are installed like that on my bike, and I still have a bunch in a bag out in the garage so I went to look at them. It’s hard to photograph something clear, but I think you can see the arrow, just the way I have them installed.
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That is truly weird, are they Australian made? Cuz every cone filter I've ever seen has a flow arrow in the opposite direction. Which makes sense right? the chamber is for debris to collect in and tell you "hey, I'm dirty over here". before it completely plugs up.
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That is truly weird, are they Australian made? Cuz every cone filter I've ever seen has a flow arrow in the opposite direction. Which makes sense right? the chamber is for debris to collect in and tell you "hey, I'm dirty over here". before it completely plugs up.
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I totally agree with that logic. I was looking closely at them last night and what you’re saying makes sense.
 
I agree with most of the thoughts on the "blue goo".

However once in a while a gasket might need a little help, say if the surfaces have been damaged due to PO getting carried away scraping old gasket off. It is always best to use a fine file to smooth off the damaged area, but sometimes due to the design of a part that is not possible. Such as the area like that cap for the oil filter with the surface recessed.

In that case if I was to attempt to use a silicone sealer I would apply it much like you would if using a coat of grease to make gasket come off easy in future. By that I mean apply it with a finger tip and only leave enough to "wet" the surface. If you can wipe any off with your finger then it is too thick!

I would rather deal with a slight leak that needs washing off once in a while than risk sealant getting someplace that stops flow of oil! If put on as heavy as it looks in the above pictures it is very common for the silicone to push parts of the gasket out of place causing an even bigger leak than if nothing had been done.
 
I agree with most of the thoughts on the "blue goo".

However once in a while a gasket might need a little help, say if the surfaces have been damaged due to PO getting carried away scraping old gasket off. It is always best to use a fine file to smooth off the damaged area, but sometimes due to the design of a part that is not possible. Such as the area like that cap for the oil filter with the surface recessed.

In that case if I was to attempt to use a silicone sealer I would apply it much like you would if using a coat of grease to make gasket come off easy in future. By that I mean apply it with a finger tip and only leave enough to "wet" the surface. If you can wipe any off with your finger then it is too thick!

I would rather deal with a slight leak that needs washing off once in a while than risk sealant getting someplace that stops flow of oil! If put on as heavy as it looks in the above pictures it is very common for the silicone to push parts of the gasket out of place causing an even bigger leak than if nothing had been done.
Thank you sir.
 
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