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Stock bore size for a 650?

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  • Stock bore size for a 650?

    Hey everyone! My machinist is boring the cylinders on my 91 VXR 650. But before he does, he needs to know the stock bore size. Right now, he is measuring 79.5mm. What size did this cylinder start as? I thought it was 79mm. So basically, if it is at 79.5 now, and he needs to bore an additional 0.50, I will need to order a 1.0mm oversize kit from SBT, correct?

  • #2
    Re: Stock bore size for a 650?

    Stock was 77. Time to resleeve or get a cylinder exchange kit.
    SBT Tech Support is here to help with your problems.
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