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  1. #1
    VdeKock's Avatar
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    14/21 prop experience...?

    Im looking for a impeller upgrade for my gp1300 2005 with 87mm exit nozzle.
    found alot info with search on the 14/20 but not for this 14/21...

    looking to by this YF-CD 14/21 prop or another YG-DF 15/22
    http://www.4-tecperformance.com/inde...products_id=94

    some people have this...? Any Good..?

    I am only looking for top speed.
    Running 130psi and 7100rpm

    ow and the sealevel you are talking about....!
    We are 0,3M (1Feet) Down to Sea level


  2. #2

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    If you are only turning 7100 I wouldn't think you would gain anything by going to a 14/21 or 14/22. They would load you down too much if you do not change anything else.

  3. #3
    "just sayin".. jetdave56's Avatar
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    Quote Originally Posted by LT1GMC View Post
    If you are only turning 7100 I wouldn't think you would gain anything by going to a 14/21 or 14/22. They would load you down too much if you do not change anything else.
    Yep...rpms too low...7200-7300 would be about right..more compression(150psi) and porting (cylinder intake/exhaust) that will get you there and be the best investment you'll make for this GPR in my opinion..also a R&D rideplate cut for speed will put you somewhere in the mid 70mph now with that 14/21 spinning...

  4. #4
    OzarkYamMonster's Avatar
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    Jetdave56 tell LT1GMC about what you did to your GP 1300 before you sold it (gave it away) HaHa .... if I remember, you were getting 75 MPH /GPS

  5. #5
    ...the other concern/question would be the difference between the Concord 14/21 and the Dynafly 14/20 (assuming that you're considering that in the mix). The Concord might be for the smaller pump...05' was first year for the larger diameter pump, but am not sure....?

  6. #6
    VdeKock's Avatar
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    Mmm oke...to bad.

    So the dynafly 14/20 is my best option for top speed.
    Need to go make serious tuning now then.
    Hoping for good wheater soon and test Jims plate, its 5*C (40*F) at the moment

  7. #7
    "just sayin".. jetdave56's Avatar
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    He'll need the Dynafly for that ski (155mm pump) 05-08....

    Yep practically gave her away...As technology changes it effects everything around us....2 strokes just don't have the power and pull of a forced induction 4 stroke....Most members on GH started on 2 strokes at one time..need to spend alot to bring a 2 stroke up to date with the latest SC/turbo advancement to be on a performance scale...then,again there cheaper to build and repair than the 4 strokes..gas/oil expense on the 2 stroke just has to be turning people away if you expect to ride at least 2 hrs in a day...IMO

  8. #8
    lazsrxp's Avatar
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    I have friend that has a Dynafly 14/21
    Forsale lmk if ur interested

  9. #9
    VdeKock's Avatar
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    Quote Originally Posted by lazsrxp View Post
    I have friend that has a Dynafly 14/21
    Forsale lmk if ur interested
    Mmmm interesting....
    Must check RPM's with new tiny tach, cant do before april (to cold)
    What price inc. Shipping to Netherlands ..?

  10. #10
    powerstroke specialist mikegp's Avatar
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    Quote Originally Posted by VdeKock View Post
    Quote Originally Posted by lazsrxp View Post
    I have friend that has a Dynafly 14/21
    Forsale lmk if ur interested
    Mmmm interesting....
    Must check RPM's with new tiny tach, cant do before april (to cold)
    What price inc. Shipping to Netherlands ..?
    I'm going to give you a idea, i'm running a 14/21 dynafly and its getting me 75.6 +/- with a half a tank and a 158 lb rider.

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