hi comp e50

danjor /
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I recently derestricted my 1hp maxi. ie intake plug and 80 thousands head gasket . i milled the ridge off the head wich was about 50thousands. now the cylinder pressure is 235 vs stock 135. motor has more torqe and beter acelleration. my question is, how much more can i mill the head without hiting the piston or knocking.

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