1915 Harley twin spark plug ?

[rwolfe]

Want to know what recommended for spark plugs on my 1915 HD.Have original Splitdorfs but are dead.I believe 7/8 plug.thanks Rick

[exeric]

I'm using Autolite 3076 plugs in my 1916 J. I just got 2 sets from NAPA, which is the easiest, and cheapest source I have found.

[rwolfe]

Hi Eric,are they 7/8 plug?

[exeric]

I know '15, and '16 are virtually the same cylinder, with a few minor differences, and they both take the same size spark plug.

[duffeycycles]

Wasn't the splitdorf origenally for Indains not HD?

[exeric]

I know the green Splitdorf plug was the default plug for Excelsior, but I'm not sure about H-D. I have a set of Splitdorfs that I used in my '16J and they worked good. They look like a very high quality plug.

[duffeycycles]

[exeric]

I wonder what the brand of spark plug item #110 was? Great looking plug, and a long reach too. Thanks Roger.

[duffeycycles]

telegraph code Dad,CICO spark plug 75cents-that long reach is cool

[exeric]

I think I paid about $2.75 for the Autolites I just got. At .75cents that CICO plug was very expensive in it's day. Somebody that was good at math could probably tell us what the equivalent of .75cents in 1915 would be in 2016

[duffeycycles]

$17.55 todays money..each plug

http://www.ebay.com/itm/VINTAGE-AC-C...wAAOSw9N1Vr9Fo

http://www.ebay.com/itm/1922-ADVERT-...8AAOSwPcVVgXde