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Window or no window in EG big bore kit

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Any of you guys that have the EG big bore kit have a solid piston

with no large hole on the intake side ? I.m getting the kit for my

KX and Eric says I dont need the hole ! Opinions ????

Thanks

Dave

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The hole changes the loop scavaging and typically adds more hit but narrows up the power spread, so no hole makes for a smoother power band, that's my understanding anyhow.

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