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  1. #1
    2000 GPRXP 4tec shooter98xpl's Avatar
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    Lightend flywheel - 1300

    who lightens the oem stock flywheel for the 1300 non power valved gpr motors?
    SHOOTER


  2. #2
    WATER WOODY's Avatar
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    I know RAD used to,not sure they still do.Maybe Crankworks,not sure though.

  3. #3
    spud's Avatar
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    George Grabowski lightens them. I have one in my ported 1300. Robsauto had one for sale. I don't know if he still has it.

  4. #4
    Moderator OsideBill's Avatar
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    are the 1200's and 1300's the same?

  5. #5
    spud's Avatar
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    Good question Bill. Mine was a 1200 that George lightened.

  6. #6

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    I have a ported, power value 1300. Will a lightend fly wheel increase my rpms? Any one have any experience with these?

  7. #7
    Chrisrokc's Avatar
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    Advantages or Disadvantages of this?

  8. #8
    African-American
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    A flylighter wheel takes strain off the engine and allows the engine to rev more freely, as a bonus as there is less weight the engine is able to release more power.

    You’ll notice an engine with lightened flywheel increases and decreases revs a lot more quickly than a standard engine. The big downside to a lighter flywheel is that engine momentum or inertial spin is reduced, if you ride in the surf or very rough water it would put more strain on the engine and might have adverse affects on performance.

    With a heavy flywheel the engine momentum is maintained.

    newly-lightened flywheel must be rebalanced to prevent vibration or failure.

  9. #9
    2000 GPRXP 4tec shooter98xpl's Avatar
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    Rad is not doing them. Crankworks does not touch them. I ride in smooth water 95% of the time. I had one on my XPL for years, that and a lightened PTO. As far as noticing any difference in the surf, not one bit. The boat still pulled just as hard, if there was any difference, it wasn't noticeable.
    Who is George Garbowski? What did he charge to lighten a flywheel?
    SHOOTER

  10. #10
    Moderator OsideBill's Avatar
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    google search results
    http://www.hpt-sport.com/preface.htm

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