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Intake o-rings should always be replace.

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    Intake o-rings should always be replace.

    Got my engine taken from the donor bike.

    Checked my compression and its 140 across the board.
    A far cry better than the 0 on cylinder 4 of my original motor.

    Anyway while the slug was out I decided to pop of the intakes and sure enough one had clear signs of having leaked some.
    They were flat as pancakes and there is no sane reason for ever reusing rings when Robert Barr is a PayPal payment away.

    140 compression across all 4 cold engine
    I think that is good for a 9.8 - 1 engine.
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