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<DIV><FONT face=Arial>Ken,</FONT></DIV>
<DIV><FONT face=Arial>You should be able to scrape the whole valve including the
mushroom area where the seal is made. Just scrape down the stem and continue
thru the radius and out to the edge. With a #11, you don't have to worry about
scraping too hard. You'll see the shiny metal of the valve once the carbon is
off. I use one of those "Gunk" brand carburetor dip tanks to clean the head
which includes the valve seats. About twenty minutes in the tank, and you'll be
able to brush the carbon off the brass seat with an old toothbrush. For some
reason, the dip tank doesn't even faze the carbon on the valves. You can get the
Gunk brand dip tank at Murray's. Once you've done that, just wash the parts in
water as hot as you can stand and blow dry. I've never had the need to lap the
valves with toothpaste or anything else. Just reassemble everything and you
should be good to go with lots of compression. Don't forget to lash the valves.
</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Verne</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=mrandmrst@comcast.net href="mailto:mrandmrst@comcast.net">Ken
Thompson</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, June 08, 2005 5:28
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> YS-91 almost done</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>Well folks, </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>This is what I did, I pulled the head and took it
apart just like Mike Darr told me to do. I didn't even lose the spring
retainers. </FONT></DIV>
<DIV><FONT face=Arial size=2>I chucked the stem up in my Dremel and cranked it
up on high, having some plumbers sandpaper handy I ran a strip of 100 grit on
the stem until it shines like new! That ought to do it!!
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Not really, I did just like Verne told me too and
used a # 11 and scraped it gently just until the rough stuff was gone. I
wiped the stems with a rag and am ready to re-install the valves. I am
going to use toothpaste to re-seat the valves and my question is, when I'm
done with that can I just wipe the excess off or do I need to clean it with
something special before re-assembly.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks in advance,</FONT></DIV>
<DIV><FONT face=Arial size=2>Ken</FONT></DIV></BLOCKQUOTE></BODY></HTML>