[Healeys] Tapping SUs for air filters.
Michael Salter
michael.salter at gmail.com
Thu Nov 22 09:04:13 MST 2018
Just remember that if you or anyone else decides to revert to original
filters it may be difficult to position them correctly
.
M
On Thu, Nov 22, 2018, 10:50 AM Kees Oudesluijs <coudesluijs at chello.nl wrote:
> That thread is way to large to use, that would be equivalent to M10. The
> normal size would be M6 or about 1/4".
>
> Kees Oudesluijs
>
>
>
> Op 22-11-2018 om 15:15 schreef simon.lachlan at alexarevel.plus.com:
>
> 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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