08 crf50 build.

You take the spacer out between the two gaskets which are between the head and the barrel.

Hmmmm rev box um well LOL didn't notice a difference really I guess it free revs more then stock.

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Will the gasket mod work on the 88cc

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No idea mate but you wont need to do it the 88 will have a ton of torque.

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Dont go doing the gasket mod on your 88....it will just bring in possible issues with your engine when its not even needed.