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<div dir="ltr" data-setdir="false">The fall rate test is for the piston fit in the chamber not the centering of the jet(s) on HD6's.</div><div dir="ltr" data-setdir="false">The air cleaners need to be removed, not easy on a tri-carb setup, to gain access to the jet centering fittings. It is difficult for me to think all 3 needles are not centered.</div><div dir="ltr" data-setdir="false">If all three carbs have failed the piston fall rate test, my first thought is that the pistons have become mis-matched with their mating bell housings. </div><div dir="ltr" data-setdir="false">Gary Hodson</div><div><br></div>
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On Tuesday, August 6, 2024 at 02:51:47 PM CDT, JSARCH via Healeys <healeys@autox.team.net> wrote:
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<div><div id="ydp3c5aada5yiv7087891246"><div><div class="ydp3c5aada5yiv7087891246WordSection1"><p class="ydp3c5aada5yiv7087891246MsoNormal">I would say most likely based on the attached instructions the SU Service Manual. There is a specification for the fall rate of the piston, at least for the HS4 carbs. You might find it on the SU Berlin website. <a shape="rect" href="https://sucarb.co.uk/technical/category/hd-type-carburetters" rel="nofollow" target="_blank">https://sucarb.co.uk/technical/category/hd-type-carburetters</a></p><p class="ydp3c5aada5yiv7087891246MsoNormal"> </p><p class="ydp3c5aada5yiv7087891246MsoNormal">John</p><p class="ydp3c5aada5yiv7087891246MsoNormal"> </p><div id="ydp3c5aada5yiv7087891246yqt29257" class="ydp3c5aada5yiv7087891246yqt3747416230"><div><div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in;"><p class="ydp3c5aada5yiv7087891246MsoNormal"><b>From:</b> Healeys <healeys-bounces@autox.team.net> <b>On Behalf Of </b>Simon Lachlan via Healeys<br clear="none"><b>Sent:</b> Monday, August 5, 2024 7:09 AM<br clear="none"><b>To:</b> Healeys <healeys@autox.team.net><br clear="none"><b>Subject:</b> [Healeys] HD6 jet adjustment</p></div></div><p class="ydp3c5aada5yiv7087891246MsoNormal"> </p><p><span lang="EN-GB" style="font-family:New serif;">I’m told that the jets on my HD6s are not quite correctly centred. The pistons do not fall fast enough nor with a satisfactory</span><span lang="EN-GB"> </span><span lang="EN-GB" style="font-family:New serif;">“click”. I have three of them in my MkII BT7. Do I have to</span><span lang="EN-GB"> </span><span lang="EN-GB" style="font-family:New serif;">take the carbs out or can it be done in situ? Not a lot of room……..</span></p><p><span lang="EN-GB" style="font-family:New serif;">Simon</span></p></div></div></div></div><div class="ydp3c5aada5yqt3747416230" id="ydp3c5aada5yqt51411">_______________________________________________<br clear="none">Support Team.Net <a shape="rect" href="http://www.team.net/donate.html" rel="nofollow" target="_blank">http://www.team.net/donate.html</a><br clear="none">Suggested annual donation $12.75<br clear="none"><br clear="none">Archive: <a shape="rect" href="http://www.team.net/pipermail/healeys" rel="nofollow" target="_blank">http://www.team.net/pipermail/healeys</a> <a shape="rect" href="http://autox.team.net/archive/healeys" rel="nofollow" target="_blank">http://autox.team.net/archive/healeys</a><br clear="none"><br clear="none"><a shape="rect" href="mailto:Healeys@autox.team.net" rel="nofollow" target="_blank">Healeys@autox.team.net</a><br clear="none"><a shape="rect" href="http://autox.team.net/mailman/listinfo/healeys" rel="nofollow" target="_blank">http://autox.team.net/mailman/listinfo/healeys</a><br clear="none"><br clear="none">Unsubscribe/Manage: <a shape="rect" href="http://autox.team.net/mailman/options/healeys/warthodson@aol.com" rel="nofollow" target="_blank">http://autox.team.net/mailman/options/healeys/warthodson@aol.com</a><br clear="none"><br clear="none"></div></div>
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