Quote:
Originally posted by CBRacerX
H'mm - I have had stock 964 heads machined to accept 102mm cylinders, but there was no chamfer done. Should I be concerned?
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If the head is flat and the piston is curved at the outer diameter then yes. The concern is if the mixture can get trapped and not pushed out to the center. If the edge of the piston is flat where the head is flat, it's not as much of a concern.