Drilling airbox experiment

dariusjonsson said:

I removed the rubber elbow that goes into the airbox and dremeled out about a 4 square inch hole on the bottom piece of plastic between the battery and airbox. Butt dyno says it made a non-negligable difference. As you know, power falls flat on its face after 8k rpm and this seemed to help extend the torque curve a bit. Anyone have other mods to help it breathe better up top?

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