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Discussion Starter · #1 ·
Did a search on what temp plug to run with ATRE. Nada. So, which model of NGK to use (I want to go iridium) with an ATRE for optimal performance? Or does it even matter? As I understand it, going from NGK7 and up, the plug temp runs colder.???
 

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Members here are running 9's with the ATRE install.
 

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Mine had the NGK 9s in it last year when I bought the bike. It wasn't long before I started noticing engine roughness at steady highway speeds. I pulled the plugs and noticed two things; the plugs were pure black from fouling, and the manual called for the 8s as the standard plug. I was running a TRE at the time. I installed a new set of 8s and I've had no plug problems since.
 
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