What spark plugs and gap for a 73 FLH
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With electronic iggy I would buy Champion RN12YC and gap to .040
This is a steady combination that works for me but please check this as due to further research, thanks John, the plug maybe too long.
This worked in one of my previous Evos and in a friend's bitsa Shovel that is titled as a seventy five but may not be.
This is a steady combination that works for me but please check this as due to further research, thanks John, the plug maybe too long.
This worked in one of my previous Evos and in a friend's bitsa Shovel that is titled as a seventy five but may not be.
Last edited by Tee⋁ 09-05-2015 at 09:21 PM.
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I pulled the plugs. They are Accel 437s. The threaded part is much shorter. Does that mean that some engine work was done on the bike? Parts store didn't have them and the cross reference was the one with the longer thread. The plugs were a bit dark from running rich. I went down a size on the main jet in the S&S E, cleaned the plugs off and put them back in. I have no clue on what to do with replacement plugs. Any ideas? Thanks.
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you need to get the date codes off the heads and or picture the numbers up so we can tell what heads you have - a long plug in a short head hits the piston and a short plug in a long head carbons the lower threads up and the engine wont run correctly the entire time they are in it
Where would I find the date codes?
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