yamaha xl800 crank seal orientation and crankcase sealer?

[joe_skis]

Two questions here: Here are pictures of my two crank seals, but I am unsure which goes where facing what directions. I've looked it up and some people say springs facing out, some in, and some different. Also, some people say pack on grease and add sealer to the groves of the seals. Just looking for some guidance on proper installation.
And
What is a good crankcase sealer?

 

[Pro-pulsion]

Permatex Moto Seal has served me well over the years so I stick with that, plus it's available almost everywhere that sells sealants for engines and it's not expensive. I have always installed crank seals with the springs out and this is how Yamaha recommends them to be as well. If you look at the seals to the right in the pic for a 650/701/760 crank, you'll see how the little shoulder is seated in the cases with the longer portion facing outward in the circled image of the seal cross section. You can also see the standoff squares on the seal pointing away from the crank. In your second pic those standoff squares are facing the camera. Also, I have never applied sealant to the rubber on crank seals or any rubber seal. Most sealants won't stick to rubber or won't stick to it for long. I have found it's best to just allow the rubber to seal against the cases as is but I do always add some waterproof grease to the inside diameter of the seals, it gives them some long lasting lubricant on an otherwise dry surface until they seat in and get oil from the fuel charge, it also helps them live a lot longer. They don't need a lot, just fill any voids and on the lip of the seal. That has always been adequate from my experience

 

[joe_skis]

Permatex Moto Seal has served me well over the years so I stick with that, plus it's available almost everywhere that sells sealants for engines and it's not expensive. I have always installed crank seals with the springs out and this is how Yamaha recommends them to be as well. If you look at the seals to the right in the pic for a 650/701/760 crank, you'll see how the little shoulder is seated in the cases with the longer portion facing outward in the circled image of the seal cross section. You can also see the standoff squares on the seal pointing away from the crank. In your second pic those standoff squares are facing the camera. Also, I have never applied sealant to the rubber on crank seals or any rubber seal. Most sealants won't stick to rubber or won't stick to it for long. I have found it's best to just allow the rubber to seal against the cases as is but I do always add some waterproof grease to the inside diameter of the seals, it gives them some long lasting lubricant on an otherwise dry surface until they seat in and get oil from the fuel charge, it also helps them live a lot longer. They don't need a lot, just fill any voids and on the lip of the seal. That has always been adequate from my experience View attachment 433161

is there supposed to any gaps suck as this.(this is springs out)

 

[Pro-pulsion]

If you have the old crank, you can use the wear marks to compare where the seals originally sat to get a better idea of how they should be, but according to the parts diagram the outer ring on the seal O.D. is on the crank side.

 

[DylanS]

is there supposed to any gaps suck as this.(this is springs out)

Flip the inside seal. Inner lip toward crank. Put grease on the inside lips and some guys like to put grease between the two seals, I personally do not.
You do not need any sort of sealer on the outer lips. I have run seals with and without threebond and the only difference I found is that it’s a huge PITA to clean the cases later down the line with threebond.