Jan 3, 2012 · Prior till now, spark plug manufacturers have favored platinum for their long life or performance spark plugs due to its high melting point. However platinum alone is no longer enough, …

Apr 2, 2010 · HD stock plugs work just fine. The only thing the fancy plugs do better is empty your wallet faster. It only takes one spark from one electrode to ignite the mixture, 3 of them don't do it any better.

Apr 19, 2013 · Stock 6R12 Plugs - Harley Davidson Community Here is some reading about how exotic plugs could affect your bike

Apr 2, 2010 · Old racing tip , like indexing plugs, it does work tho not many know of this almost a lost art, Knowledge is power only if its used, that is a Quote by the author of The Big Twin Performance …

Aug 23, 2010 · Spark plug manufacturers have been making the same claim for different plugs forever. Stock plugs work just as well in a stock or close to stock engine.

Apr 2, 2010 · Are the $20 in spark plugs worth the difference? I guess it is a personal thing. 2 or 3 hp, if that is the case (still up for discussion), most likely will not be noticed by the average rider on the street.

Apr 2, 2010 · I know this is old, but stumbled on it since I was looking for info on the E3 plugs. It is funny the manuals and Fix My Hog insist on OEM plugs. I was running rich and needing a carb rebuild on …

Aug 24, 2010 · I question the anti-knock also. "If" the computer is set to work with the stock plugs, do you have to re-set computer if Screamin' Eagle platinum plugs are installed? wilks3 The threshold of …

May 22, 2011 · Probably due to it having a 18g Greddy turbo kit, stock injectors, bad tune, BOV vented on ECMLink 2.5, and possibly these E3 spark plugs on 7mm wires. Are any of you guys running …

Aug 22, 2014 · We also degree the spark plugs so the spark is more centered in the cylinder and angle it to direct the fire towards the exhaust valves. Since our plugs are pretty much centered in the cylinder …