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Thread: Spark Plug color with new Tecnigas exhaust

  1. #1
    apriliaforum prov-nov vermi's Avatar
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    Jun 2014

    Question Spark Plug color with new Tecnigas exhaust

    It's over a month i install a new exhaust Tecnigas GP4 on my Piaggio Typhoon 2013 4t 4 valve.
    I change the original Pilot jet #35 because it always make big backfire on deceleration, now i use Pilot jet #33 Much better!
    The main jet is #75. I check the spark plug on the driveway,it's hard to check on this model!

    Today i check the spark plug, for me it look good but I need your opinion!

    Thank's!!! Click image for larger version. 

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  2. #2
    apriliaforum expert
    Join Date
    Jul 2015
    clean the threads in the head out with wd40 and q-tips to suck the grime out of the threads and get a new sparkplug. i dont see any white/gray ash do you? so its either good now or rich a hair. just dont burn it to hot...stay away from that and just come down from rich untill u stop fouling plugs after a week or a month or a year. it would then look chocolate and pretty clean with no big ashy kernel surrounding the spark
    --- diploma for engine repair in 2012
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