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exhaust cam mod

  1. Has anyone done the Exhaust Cam Mod and had to change it back ?

    Yamaha YFZ450/450R (2004-Present)
    Has anyone done the Exhaust Cam Mod and had to change it back because it would stall out at idle ? Or for any othre reason? I discussed this mod with a mechanic at my local Yamaha Dealership and he acted unaware of it ???
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