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  1. #1
    alex29573's Avatar
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    Port timings for gp1300r

    anyone know the intake/exhaust durations on a stock 1300r?

    thanks in advance


  2. #2
    alex29573's Avatar
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    anyone? woody? ross? wfo?

  3. #3
    Happily Self-Employed WFO's Avatar
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    you will have to get with one of the guys with the TSR software

    like Woody or Lowell

  4. #4
    WATER WOODY's Avatar
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    Alex, what are you trying to do?

  5. #5
    alex29573's Avatar
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    i have a set of cylinders that are 198/130 (were ported by a local). I want to know if they just widened the exh/transfers or iif they actually changed timings.

    Not asking for any secrets here, just stock port timings on 06 non powervalve cylinders

    thanks

  6. #6
    alex29573's Avatar
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    no help?

  7. #7
    PolarisNut's Avatar
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    Most people don't have a way to properly degree a 2 stroke's ports...You might have better luck just checking port heights. Measure the height of the exhaust and transfers from the top of the cylinder and post it up in millimeters...as long as your cylinders haven't been "decked", this will give you the info you need.

  8. #8
    old school gp's Avatar
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    Quote Originally Posted by alex29573 View Post
    no help?
    I will let u no 2morrow I just had a friend measure mine today but I have to ask him the numbers,who local did the port for u

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