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  1. #1
    Mik72e's Avatar
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    Concord or DynaFly for a 03 GP1300R

    Hi Guys iam sure this has been answered before some where couldn t find anything on it what s the difference between and 14/20 Concord and DynaFly.


  2. #2
    ramnj's Avatar
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    Look at the picture Johnjet posted on this thread.

    http://www.greenhulk.net/yamaha/viewtopic.php?t=715

    Concord = 00-04
    Dynafly = 05-06

  3. #3
    ABBOTT's Avatar
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    the diameter is larger on the dynafly, that is why they work so well on the 87mm 05-06 pump set-ups. However repitching a dynafly is not nearly as easy as repitching a concord prop.

  4. #4

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    I have a 2003 with a 05 pump. I have been running a trued 14x20 concord, but have a dynafly that has been trued by Carl. I am currenty running 7280 rpm's. Does anyone see any gains to be had with the dynafly?

  5. #5
    ramnj's Avatar
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    Quote Originally Posted by Purple Haze
    ...I am currenty running 7280 rpm's. Does anyone see any gains to be had with the dynafly?
    Are those RPM's with the concord or dynafly?

  6. #6

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    Excuse me, those rpms should be 7180 with the Concord prop and a 87mm nozzle. I understand the dynafly will turn an even higher rpm?

  7. #7
    ABBOTT's Avatar
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    Quote Originally Posted by Purple Haze
    Excuse me, those rpms should be 7180 with the Concord prop and a 87mm nozzle. I understand the dynafly will turn an even higher rpm?
    All depends on the custom pitch. 7280 sounds about 100 rpm higher than the target range. It is possble that you are running 7180 with the concord and 7280 with the dynafly. If that is the case, then there is some speed left on the table when using the dynafly, so i would get that one proped "up" just a hair to get those rpms back down to the 7150 range.

  8. #8
    flyboy's Avatar
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    purple,
    What are ported heads?

  9. #9
    ABBOTT's Avatar
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    Quote Originally Posted by flyboy1300
    purple,
    What are ported heads?
    thats for the larger diameter spark plugs that we are secretly running.LOL

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