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Joe are you in that area where stihl used 1mm base gaskets instead of the .5mm gasket like we use here?
You won't change the port timing that much by lowering the cylinder .The degrees will remain the same as far as "blow down " between the opening of the exhaust and opening of the transfers .The intake will advance slightly and the exhaust will be retarded slightly .Probabley around three degrees which if anything will increase the torque but might slightly decrease the top end speed .
Started by KilliansRedLeo How To Basics and Fixes
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Started by 1manband How To Basics and Fixes
Started by Cut4fun . Stihl