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stock head 25cc neil ? https://www.micra.org.uk/threads/general-opinion-on-1275-compression-ratio.45909/the stroke increase is 2.3mm but the piston only rises half that figure eh
stock head 25cc neil ? https://www.micra.org.uk/threads/general-opinion-on-1275-compression-ratio.45909/
the stroke increase is 2.3mm but the piston only rises half that figure eh
