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I've not tried this, but my first thought is that the aluminium bodies
of the SUs would be too soft; eventually, you might strip the threads
(esp. if trying to get a good seal with the filter). Why not do what
you're likely to end up doing anyway: installing thread inserts
(Helicoil or similar). I think 5/16" bolts would be sufficient.
Bob
On 11/22/2018 6:15 AM, simon.lachlan@alexarevel.plus.com wrote:
>
> I?ll be removing my carbs soon in order to achieve clearance for
> raising (the front of) the engine. (Harmonic balancer installation).
>
> So, it struck me that I may give my 3 HD6s another go. Swap them with
> the current setup.
>
> Thinking it through and looking at the big box of bits, I recalled
> what a pain it is to get the nuts and two washers onto the bolts that
> hold on the air filters. I have French manufactured K&N lookalikes.
> The bolt starts inside the filter, goes through the carb and gets two
> washers and a nut. Very awkward to deal with those nuts and washers. PITA.
>
> I thought that I might put in helicoils then I thought ?Why not tap
> the holes??
>
> The holes on my HD6s are 11/32? or 8.8mm.
>
> I am no engineer but it seems to me, from looking at tables on Google,
> that I could use a 25/64? drill bit and tap them out to 7/16?. I have
> both the drill and the tap but would like some expertise applied to
> the issue before I start drilling.
>
> Any input would be much appreciated.
>
> Thanks,
>
> Simon
>
>
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<p>I've not tried this, but my first thought is that the aluminium
bodies of the SUs would be too soft; eventually, you might strip
the threads (esp. if trying to get a good seal with the filter).
Why not do what you're likely to end up doing anyway: installing
thread inserts (Helicoil or similar). I think 5/16" bolts would
be sufficient.<br>
</p>
<p>Bob<br>
</p>
<div class="moz-cite-prefix">On 11/22/2018 6:15 AM,
<a class="moz-txt-link-abbreviated"
href="mailto:simon.lachlan@alexarevel.plus.com";>simon.lachlan@alexarevel.plus.com</a>
wrote:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal">I?ll be removing my carbs soon in order to
achieve clearance for raising (the front of) the engine.
(Harmonic balancer installation).<o:p></o:p></p>
<p class="MsoNormal">So, it struck me that I may give my 3 HD6s
another go. Swap them with the current setup.<o:p></o:p></p>
<p class="MsoNormal">Thinking it through and looking at the big
box of bits, I recalled what a pain it is to get the nuts and
two washers onto the bolts that hold on the air filters. I
have French manufactured K&N lookalikes. The bolt starts
inside the filter, goes through the carb and gets two washers
and a nut. Very awkward to deal with those nuts and washers.
PITA.<o:p></o:p></p>
<p class="MsoNormal">I thought that I might put in helicoils
then I thought ?Why not tap the holes??<o:p></o:p></p>
<p class="MsoNormal">The holes on my HD6s are 11/32? or
8.8mm.<o:p></o:p></p>
<p class="MsoNormal">I am no engineer but it seems to me, from
looking at tables on Google, that I could use a 25/64? drill
bit and tap them out to 7/16?. I have both the drill and the
tap but would like some expertise applied to the issue before
I start drilling.<o:p></o:p></p>
<p class="MsoNormal">Any input would be much appreciated.<o:p></o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Simon<o:p></o:p></p>
</div>
<br>
<pre class="moz-quote-pre" wrap="">
</pre>
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