<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
color:black;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-margin-top-alt:auto;
margin-right:0in;
mso-margin-bottom-alt:auto;
margin-left:0in;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
color:black;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;
color:black;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Update:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I got a glass of wine, my comfy work chair up to the side of Neville’s engine bay and began retuning the carbs. Yes, his name is Neville. Pulled choke out with gas pedal to floor. Did help a little bit but still required second hand to get it where I wanted to. Engine warmed up, idle and air flow reset on each carb. Definite hesitation on acceleration. Enriched mixture on each carb one flat at a time and tested accelerator. On third flat it accelerated smoothly! Eureeka! Readjusted idle again. Its happy place is right at 900 rpm. Will go lower, but doesn’t like it. Where I had the mixture previously adjusted seemed right since the idle reacted as manual states when I lifted piston. However, it wasn’t “right” overall. I’ll give it a road test later when it dries out. Thank you all for your patience and advice. And of course upon buttoning up the hood, one of the hood fasteners stripped. Ugh. <o:p></o:p></p><p class=MsoNormal>Cheers,<o:p></o:p></p><p class=MsoNormal>Jim Henningsen<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> David P <frogeye@porterscustom.com> <br><b>Sent:</b> Monday, November 05, 2018 6:42 PM<br><b>To:</b> Randall <TR3driver@ca.rr.com>; 'Jim Henningsen' <trguy75@gmail.com><br><b>Cc:</b> 'triumphs' <Triumphs@autox.team.net><br><b>Subject:</b> Re: [TR] TR3A Choke Question<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p>Randall is quite correct.. if the piston rises too quickly air flow (velocity) across the jet head is lost/decreased and the mixture goes lean. The dampers (of which there are different sizes-BTW) at as a defacto accelerator pump by keeping the piston from rising too quickly.. Hope this info clears up some SU mystery.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 11/5/2018 9:20 AM, Randall wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre><o:p> </o:p></pre><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre>What kind of oil are you using in the dash pots? If the oil <o:p></o:p></pre><pre>is too heavy, it may overdamp the pistons, causing them to <o:p></o:p></pre><pre>rise too slowly and momentarily weaken the mixture, causing <o:p></o:p></pre><pre>the hesitation. I find 3 in 1 is about the right weight. <o:p></o:p></pre></blockquote><pre><o:p> </o:p></pre><pre>Actually, it's just the opposite. Heavier oil makes the mixture go richer<o:p></o:p></pre><pre>right after you open the throttle. Using oil that is too light can cause a<o:p></o:p></pre><pre>"lean bog" (like Jim described).<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>The book actually recommends 30 weight for temps between 40F and 70F; 40<o:p></o:p></pre><pre>weight above that. Optimum for you may vary somewhat, depending on engine<o:p></o:p></pre><pre>condition and so forth; but I have always found that performance suffers<o:p></o:p></pre><pre>with less then 20 weight<o:p></o:p></pre><pre><o:p> </o:p></pre><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre> The choke cable is hard to pull <o:p></o:p></pre><pre>out. Takes two ands<o:p></o:p></pre><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><pre>to pull out and then twist to lock. That's to really get the choke <o:p></o:p></pre><pre>levers to move both jets down. Is this normal or maybe I <o:p></o:p></pre></blockquote><pre>need a new choke cable.<o:p></o:p></pre></blockquote><pre><o:p> </o:p></pre><pre>Not normal, but unfortunately rather common. Did you polish the jets when<o:p></o:p></pre><pre>you had the carbs apart? Originals were supplied polished, but the<o:p></o:p></pre><pre>replacements I've seen have been dull. Dull means a rough finish, which<o:p></o:p></pre><pre>greatly increases the friction against the glands.<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>The linkage also goes together in an odd way. If you put it together the<o:p></o:p></pre><pre>way it seems it should go, it's harder to operate the choke. The two<o:p></o:p></pre><pre>clevises hang out behind the levers, rather than straddlings them.<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>I like to replace the gland sping (inside the jet housing) and the return<o:p></o:p></pre><pre>springs during a rebuild, especially if you don't know the full history of<o:p></o:p></pre><pre>them. It's not uncommon for people to stretch the gland spring out a bit,<o:p></o:p></pre><pre>in an attempt to get the glands to quit leaking. The extra pressure<o:p></o:p></pre><pre>increases friction, to the extent that often the jets won't return after<o:p></o:p></pre><pre>using the choke. So then they shorten the return spring. Both actions make<o:p></o:p></pre><pre>the choke more difficult to operate!<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>-- Randall<o:p></o:p></pre><p class=MsoNormal><br><br><br><o:p></o:p></p><pre>** <a href="mailto:triumphs@autox.team.net">triumphs@autox.team.net</a> **<o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Donate: <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a><o:p></o:p></pre><pre>Archive: <a href="http://www.team.net/pipermail/triumphs">http://www.team.net/pipermail/triumphs</a> <a href="http://www.team.net/archive">http://www.team.net/archive</a><o:p></o:p></pre><pre><o:p> </o:p></pre><pre>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/triumphs/frogeye@porterscustom.com">http://autox.team.net/mailman/options/triumphs/frogeye@porterscustom.com</a><o:p></o:p></pre></blockquote><p class=MsoNormal><br><br><o:p></o:p></p><pre>-- <o:p></o:p></pre><pre>Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM. 505-352-1378 My World go here: <a href="http://WWW.PORTERBIKES.COM/">WWW.PORTERBIKES.COM/</a><o:p></o:p></pre><div id=DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2><p class=MsoNormal><o:p> </o:p></p><table class=MsoNormalTable border=1 cellspacing=3 cellpadding=0 style='border:none;border-top:solid #D3D4DE 1.0pt'><tr><td width=55 style='width:41.25pt;border:none;padding:9.75pt .75pt .75pt .75pt'><p class=MsoNormal><a href="http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" target="_blank"><span style='text-decoration:none'><img border=0 width=46 height=29 style='width:.4791in;height:.3055in' id="_x0000_i1025" src="https://ipmcdn.avast.com/images/icons/icon-envelope-tick-green-avg-v1.png"></span></a><o:p></o:p></p></td><td width=470 style='width:352.5pt;border:none;padding:9.0pt .75pt .75pt .75pt'><p class=MsoNormal style='line-height:13.5pt'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#41424E'>Virus-free. <a href="http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" target="_blank"><span style='color:#4453EA'>www.avg.com</span></a> <o:p></o:p></span></p></td></tr></table><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>