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<DIV dir=ltr align=left><SPAN class=878105202-04092006>Hi Mike,</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=878105202-04092006></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=878105202-04092006>I thought I was in
isolation !</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=878105202-04092006></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=878105202-04092006>Exactly same
symptoms as you've described. Upon inspection there is a hair-line
crack on top of the piston, from underneath crack coincides
with the wrist pin boss </SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=878105202-04092006></SPAN><SPAN
class=878105202-04092006></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=878105202-04092006>Also refer to last
picture at bottom of this page</SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=878105202-04092006><A
href="http://f3a.sakura.ne.jp/radiocontroll/challenge-x/20060902/x20060902.html">http://f3a.sakura.ne.jp/radiocontroll/challenge-x/20060902/x20060902.html</A></SPAN></DIV>
<DIV dir=ltr align=left> </DIV>
<DIV dir=ltr align=left>Cheers,<BR>Neil M.</DIV>
<DIV> </DIV>
<DIV dir=ltr align=left>--<BR>Neil S. Martin<BR>Adelaide, South Australia,
Australia<BR><A
href="mailto:neil.s.martin@baesystems.com.au">mailto:neil.s.martin@baesystems.com.au</A></DIV>
<DIV dir=ltr align=left> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma><B>From:</B> nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <B>On Behalf Of
</B>Zoro1024@aol.com<BR><B>Sent:</B> Monday, 4 September 2006 11:49
AM<BR><B>To:</B> nsrca-discussion@lists.nsrca.org<BR><B>Subject:</B>
[NSRCA-discussion] YS160 Piston problems<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV>Just wondering if anyone else has experienced a problem with the piston
cracking arounf the wrist pin boss. I now have a second one with this same
problem. It like the first one was running like gangbusters and gradually
started losing power. On tear down the cracked piston was very evident.
Going to send this one baxck to YS with the first piston also. Looks like
the larger piston in the 160 is weak in the center.</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV>Mike H.</DIV></BODY></HTML>