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I have a power vision setup by fuel moto. I have cobra exhaust header and mufflers along with fuel moto air cleaner. I pulled my plugs tonight and they are white in color. I thought they were suppose to be light brown and the white was lean. I have done several auto tunes. I seem to get a little popping on hard down shifting. Bike seems to run good thou.

Thoughts?

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Have Jackpot header and 4 " jackpot ceramic mufflers. Got white spark plugs too. The mufflers exhibit a dusty tan so the bike is running great. Lean is mean. Bike runs great.


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Well... sorry about this Charley but maybe the dealer found your white plugs and then MoCo sees that as an excuse to say "Your ECM caused your bent valve"? Even though I don't believe that can happen, too white is too lean and an ECM map change can correct that.

Therefore I'm with TimmyG on sending a data log in so a better map can be created. Jamie is known for excellent customer service.

ETA for Charley: Maybe the comment mocotom just offered in your other thread can shed some light too? Your call on a new post in this thread.
 

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I can offer, my 03 being 1st ever injected bike(PcdmrIII) with hookers, to me white (slight tan) plugs since new, @90k and will still back down traffic on pops, been told it's gonna hole piston, bend a valve.... since new, think the cross over pipe is the fun to try to tune out, others with SE pipes the same, should ask-what kinda stage?
 

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Who says you can't teach an old dog new tricks? Thanks Jamie. I honestly didn't know that pure white doesn't automatically signal a dangerous situation.
Generally speaking plug color changes very little from 13.5-16.0 AFR, the electrode and insulator will pretty much remain clean at these mixtures, so in the end you could make a considerable change in AF and see little to no difference in plug color.
 
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