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Thread: 2 stroke to 4 stroke conversion
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Old 01-10-2011 | 07:05 PM
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Default RE: 2 stroke to 4 stroke conversion
Red Head is right in this size,
typically
4-stroke minus about 33% = 2 stroke

like
40 4c = 25 2c
70 4c = 45 2c
90 4c = 60 2c
120 4c = 90 2c
etc.etc.
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