Does anyone know if the valve seats for the intake valve are the standard 45° or are they offset at all like some motors are? I need some minor valve work on my motor, but want to make sure it gets done with the correct angles.





  • Re: Intake valve seat angles

    by » one month ago

    The valves are hardened and all you can do is clean them. DO NOT try and grind them or you will be replacing them.  The valve seats can be  re-worked, but you need two angled reems to do it. The valve guide can be reemed if you have the proper size reem and have some idea on how to do this. Doing either of these can ruin them if done wrong and then it will hurt your pocketbook. Things like this are covered in the Heavy Maint. classes.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

    Thank you said by: RotaxOwner Admin

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