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  1. #1

    plugs from cylinders 2&3 white, 1 & 4 brown.

    Does this indicate a problem? I know cylinders 2/3 typically run a little leaner but this seems to be more than a little contrast.

    Ski runs fine but AFR shows mid-high 12's @ wot when I first start riding but in 1-2 hours AFR's show 17+ so I'm not sure to believe anything my AFR gauge says.

    2013 FZS SHO
    Fizzle IC
    Riva B2 Wheel
    Riva fuel pressure regulator @ 56 psi on stock injectors
    Exhast/Manifold/Power filter
    Deans tune @ 9000rpm
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  2. #2

    Join Date
    Jun 2017
    Ocean City, MD
    You need to have your tuner make an adjustment to get the individual cylinders spot on if the 2013 ECU supports it. Once you get the plugs all the same you should replace the O2 and get the AFRs dialed in perfectly.

    It will take some effort, but you should be able to get all the plugs light tan.


  3. +1 by:

  4. #3
    Are u running a heat sink bung or a bung extender?

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  6. #4
    Saum700p's Avatar
    Join Date
    Sep 2017
    New Orleans
    Air reading 17 is a bad sensor. Install a heat sink or extension and new sensor its getting wet. As far as the plugs your middle two are lean. I'd bet the tune is for a ski without a ribbon delete and you have your intake ribbon pulled.

  7. +1 by:

  8. #5
    Thanks for the feedback. I don't have a heat sink bung or a bung extender. I'm going to contact Deans team and see if they think it is something that can be corrected in ECU programming.

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