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  1. #1

    Flex-Hone a Yamaha FX HO 2007?

    Need to hone my cylinders.

    Are the MR-1 FX HO 2007 nikasil or steel cylinder walls?

    Anyone know which Flex-Hone model/type and which grid to go with?

    (Also interested in buying new or in great shape pistons, if anyone sitting on 4pc..)


  2. #2
    big john's Avatar
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    try a magnet first, if it stick, use the ball hone, if not, its not safe to ball hone

  3. #3
    Used a big magnet and it sticked too good, didnīt have any small one available to test with so got a bit confused.

  4. #4
    big john's Avatar
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    if it sticks to the liner, then its ductile iron, what most cylinders are made of, its safe to hone. nikasil is a plating on aluminum thats really hard and take special hones to refinish properly. you safe to ball hone, clean and reassemble your motor

  5. #5
    crashhard's Avatar
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    They are sleeved not plated

  6. #6
    Thanks so Steel sleeved.

    Any idea if to use 240 or 320 grid?

    New piston rings will go in after.

  7. #7
    big john's Avatar
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    320 will be a little more gentle on the new rings, clean very well tho

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