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  1. #1

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    1200 to 1300 conversion

    is it safe to bore 1200 pv cylinders (80mm) to fit 1300 pistons? has anyone done this before?


  2. #2
    philip_gpr's Avatar
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    not worth doing, just find a set of GP1300R cylinders instead

    all Yamaha cylinders are Nicasil plated, this means if you bore them out you would have to send them to the US to get plated, plating costs around $200 per cylinder

  3. #3
    Happily Self-Employed WFO's Avatar
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    Quote Originally Posted by newmechanic View Post
    is it safe to bore 1200 pv cylinders (80mm) to fit 1300 pistons? has anyone done this before?
    but yes you can if you want

  4. #4
    60% of the time, it works every time.
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    Dont forget that you would meed to cut the powervalves or replace with 1300 valves to accomidate the new bore size.

  5. #5
    icky002's Avatar
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    I think most people sell their 1200 cylinders, especially if they are in great shape, and then buy three 1300pv cylinders. Now if you have three 1200 core cylinders or you are going to a non-OEM size then getting them bored and nicked would make sense.

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