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Cylinder head cover gasket blow out

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This can't be good. Rode the other day for the first time in a while, and over the winter had removed my AIS with the ThumperTalk AIS removal kit. Just realized the side half moon rubber part of my cylinder head cover gasket is pushed out. The worst part is I don't know when it happened that day, whether it blew out while riding or while I was washing the mud off. Somehow I'm thinking I missed something on the AIS instructions that caused overpressure and the gasket popping out. Has anyone had any similar occurrences? I'm scrambling trying to locate the instructions. :p

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do you still have a hose attached to the top of the valve cover that extends to the air box. if so, i dont see it as an over pressure issue. there is a little lip on the inside and outside of the round part of the half circle, maybe it just wasn't installed correctly and worked its way out.

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