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Sportster Motorcycle Motor - Top End Discuss Sportster Motorcycle Top End issues. Rockerboxes, Valves, Cylinders, Pistons, Rings, Lift Rods, etc...

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  #11  
Old 16th November 2019
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Originally Posted by BlackBikeDave View Post
I am straining my brain as to how these cometic just push on..and dry, lube or some kind of loctite? what is gonna keep them from just coming off?
Friction.

The seal body is tight onto the guide.
The seal lip has light pressure on the valve stem.
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  #12  
Old 16th November 2019
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Maxeffort n 60Gunner thanks. I tried a dry fit just a bit and it looks and feels like it will push on with some slight force and not pull off. I'll push them on dry after I seat the valves and clean the head. Still my brain is troubled but trusting both your experience. thanks again.
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  #13  
Old 16th November 2019
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Originally Posted by 60Gunner View Post
I'm pretty sure the upgraded oem seals are viton. That VS Ha2V is for the 7mm and is what I used.
Are the 03s 5/16 or 7mm?
My 03 xl1200c are also the 7mm. thanks again
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  #14  
Old 20th November 2019
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Originally Posted by Maxeffort View Post
Friction.

The seal body is tight onto the guide.
The seal lip has light pressure on the valve stem.
Agree, Once they are fitted its not like they are subject to heavy loads or stress. The valve stem is oiled and just slides up and down within the seal. Folks may be over thinking this a bit.
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  #15  
Old 20th November 2019
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Originally Posted by tussuck View Post
Agree, Once they are fitted its not like they are subject to heavy loads or stress. The valve stem is oiled and just slides up and down within the seal. Folks may be over thinking this a bit.
thanks. Its a hard concept to get a grip on coming from tapping down the OEM seals. Almost done lapping the valves and I'm gonna put it all back together.
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