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Thread: stock reeds ?

  1. #1
    GREENSMACKER's Avatar
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    stock reeds ?

    when is too many hours on stock reeds?


  2. #2
    Moderator DrewNJ's Avatar
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    It really depends on a lot of things....

    I'd figure 150 to be about when you would want to think about changing them.... My 1200 reeds at 175 hours were pretty burnt on the edge of the peddles on the ski I just picked up.
    But the ones on the ski I just got rid of looked good at 140 hours...

    Tough question to really pinpoint...

  3. #3
    GREENSMACKER's Avatar
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    ever since i put thi d/f on my ski has been running like crap i was thinking reeds , only turning 6900 to 7000 rpms at 68 mph my ski has 125 hrs on it guess i need to check comp

  4. #4
    Moderator DrewNJ's Avatar
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    Did you have any work done to the dynafly? or do you have any other mods other than what's in your sig?
    Most stock 1300's can't spin a box stock 14/20 without some "help".

  5. #5
    Moderator DrewNJ's Avatar
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    Whoops..Missed the "heads". What's your compression?

  6. #6
    GREENSMACKER's Avatar
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    last time i checked it was 150

  7. #7
    JKR1300's Avatar
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    Doubtful it's the reeds causing your problem. If your compression is good your reeds can't be in real bad shape. Probably need to depitch that dynafly.

  8. #8
    Moderator beerdart's Avatar
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    Reeds have nothing to do with compression. Compression is achieved when the piston passes the ports.

  9. #9
    JKR1300's Avatar
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    Quote Originally Posted by beerdart View Post
    Reeds have nothing to do with compression. Compression is achieved when the piston passes the ports.
    Here's my thinking: If reeds are worn crankcase pressure will be reduced when the piston is moving down. When piston passes intake port, less air pressure will flow (or be forced) on top of piston for compression due to reduced pressure in crankcase. If you took the reeds out completely you would still have compression, but it would be reduced since your not using crankcase pressure to help fill new charge on top of piston

  10. #10
    Moderator beerdart's Avatar
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    The only time there is any pressure in the crankcase is after compression and combustion to force the exhaust out. Without reeds you may see a 1/2 psi difference in compression at best.

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