Spark plugs

[Frazier]

Got a panhead with S&S cases , STD single plug heads , 74 cu in , .20 over 8:1 pistons , Malory elec. distribator, S&S super E carb with 28 and 68 jets , does anyone else have this combo ? If so what size plugs are you running ? Will be ridding from 6000 ‘ down to sea leval. Thanks guys

[Excalibur]

For reference I run N12YC in my STD heads. My bike is basically stock except for the heads. Hope this helps. Good luck.

[awander]

I use Champion J12YC in my slightly-stroked 80" FL.

I replace them every 4 or 5 years, whether they need it or not!

[Frazier]

Thanks guys , im off to the store !

[RooDog]

What plugs have you been using? What plugs does STD recommend? Are they long or short thread plugs? I use Bosch FR8DPX platinum in both my $&$ Shovelheads, and my aftermarket Evo crate engine.....
...RooDog...

[Frazier]

Its a new build Roodog , it had a set of 20 year old plugs in the heads just to keep the bugs out

[Edaddy]

I have STD dual plugged heads. Autolite 3926 in the winter and 3924s in the summer. These are recommended by the manufacturer.

[Excalibur]

A bit more interesting chatter from '06..
STD heads, spark plugs

[Andygears]

Definetly figure whether their short or long reach, a friend bought a bike recently that "ran like shit". It had short plugs in STD long reach heads. Huge difference.

Andygears