Re: Batavus Head Mill?

#CrazyWayne™ rocks. #CrazyWayne /
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Or my old wike post.

Cut top of cylinder .024". (Note: Dome of piston should rise 1mm or .039 inches above cylinder at TDC This should give 16.6mm or 0.655 inches (NO LESS) between the top of the piston dome and the fin side/top of the cylinder head where the spark plug gasket sits on top of head at hole. (You can use a tire tired depth test to gauge it if you cut into the sides to fit. This is good for for timing too.)

Mill head. To set gap, mill ??mm off head -- the tip of the spark plug must be 1mm (0.039 inches) (or more) away from the top of the piston dome at TDC. You're looking for an approximate compression ratio of 9.4:1 to 9.6:1 Max.

Fast bat out

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