120R plugs?

Hey, you guy's with 120R, or 124s&s, or 120HQ, what spark plugs you runnin?

I'm chasin a "ping" and I think I want to go colder? HD don't have a colder one.

Need thoughts and part numbers please.

eighty80.

Harley does have a colder plug its a 10R12. Also you can use NGK DCPR7E (I think I have the right number) as well as a colder plug.

You also should check your plug gap. No more than .40 gap. A better gap is .35-.38 if the gap is too wide its possible to get have a weaker spark for the compression.

You should also do a data run to record when your hearing the spark ping to pull some timing out in that rpm/throttle area

Tom

Thank-you!! That's the info I was looking for.

I wish I knew HOW to pull the timing out??

I have never did a data run or even hooked up to a computer.

Thank's again. George.

eighty80 said:

Thank-you!! That's the info I was looking for.

I wish I knew HOW to pull the timing out??

I have never did a data run or even hooked up to a computer.

Thank's again. George.

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+1 what FLTR says, I'm running the NGK DCPR8E set at .035. I'm finishing up with night shift tonight and will be out in the back garage sometime around 10:30 Monday morning. I'll shoot you a PM with my home phone and cell phone, I can help you out with the timing.

msocko3 said:

+1 what FLTR says, I'm running the NGK DCPR8E set at .035. I'm finishing up with night shift tonight and will be out in the back garage sometime around 10:30 Monday morning. I'll shoot you a PM with my home phone and cell phone, I can help you out with the timing.

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