oversized piston change?

  1. M

    Oversized Piston?

    I openned-up my 95 XP 720 engine. The piston is oversize and is inscribed with a 1.00mm marking. What size of piston do I order? Seems like the available sizes in online stores for the Type 717 motor are 78mm, 78,25 and 78.5? Logically, wouldn't I need a 79mm? I'm confused?
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