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Thread: Yamaha Grizzly Dyno Results with HMF Slip-on

  1. 12-08-2004, 06:27 PM #1
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    Yamaha Grizzly Dyno Results with HMF Slip-on

    I installed a HMF Slip-on, Dynojet Jet Kit, and a TwinAir filter on an 04' Grizzly 660.
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    My 440ex Mods: 12:5 Comp, White Bros. XC Cam, DRG Ported Head, DRG EXR Prototype Filter, Airbox Lid Off, 450r Carb, LRD Pro 4 Ballistic Full Exhaust...
    *Jetting: 3 turns out on the Mixture Screw, 48 pilot, Needle in the 3rd from top, and a DJ 170main*
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    Up to 42hp-30tq and For Sale*** Time for a new project!!
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  2. 12-08-2004, 06:58 PM #2
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    The TwinAir
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    ------------------------------

    My 440ex Mods: 12:5 Comp, White Bros. XC Cam, DRG Ported Head, DRG EXR Prototype Filter, Airbox Lid Off, 450r Carb, LRD Pro 4 Ballistic Full Exhaust...
    *Jetting: 3 turns out on the Mixture Screw, 48 pilot, Needle in the 3rd from top, and a DJ 170main*
    -----------------------------------------------
    Up to 42hp-30tq and For Sale*** Time for a new project!!
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  3. 12-08-2004, 07:19 PM #3
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    We started with dynoing the bike completely stock. Then we installed the HMF slip-on, Dynojet jet kit(with the recommended jetting specs), and the TwinAir. The graph shows the comparison.
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    ------------------------------

    My 440ex Mods: 12:5 Comp, White Bros. XC Cam, DRG Ported Head, DRG EXR Prototype Filter, Airbox Lid Off, 450r Carb, LRD Pro 4 Ballistic Full Exhaust...
    *Jetting: 3 turns out on the Mixture Screw, 48 pilot, Needle in the 3rd from top, and a DJ 170main*
    -----------------------------------------------
    Up to 42hp-30tq and For Sale*** Time for a new project!!
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  4. 12-08-2004, 07:24 PM #4
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    The tq gain was good
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    ------------------------------

    My 440ex Mods: 12:5 Comp, White Bros. XC Cam, DRG Ported Head, DRG EXR Prototype Filter, Airbox Lid Off, 450r Carb, LRD Pro 4 Ballistic Full Exhaust...
    *Jetting: 3 turns out on the Mixture Screw, 48 pilot, Needle in the 3rd from top, and a DJ 170main*
    -----------------------------------------------
    Up to 42hp-30tq and For Sale*** Time for a new project!!
    Reply With Quote Reply With Quote
  5. 12-08-2004, 07:26 PM #5
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    Top speed
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    ------------------------------

    My 440ex Mods: 12:5 Comp, White Bros. XC Cam, DRG Ported Head, DRG EXR Prototype Filter, Airbox Lid Off, 450r Carb, LRD Pro 4 Ballistic Full Exhaust...
    *Jetting: 3 turns out on the Mixture Screw, 48 pilot, Needle in the 3rd from top, and a DJ 170main*
    -----------------------------------------------
    Up to 42hp-30tq and For Sale*** Time for a new project!!
    Reply With Quote Reply With Quote
  6. 12-08-2004, 07:33 PM #6
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    We finished the jetting with 160 main and the needle in the 4th position. The day of the test the temp was 55* and the humidity was 26%. The altitude was 312ft.Our dyno is in a trailer so we can tune to outside(real time) conditions.
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    ------------------------------

    My 440ex Mods: 12:5 Comp, White Bros. XC Cam, DRG Ported Head, DRG EXR Prototype Filter, Airbox Lid Off, 450r Carb, LRD Pro 4 Ballistic Full Exhaust...
    *Jetting: 3 turns out on the Mixture Screw, 48 pilot, Needle in the 3rd from top, and a DJ 170main*
    -----------------------------------------------
    Up to 42hp-30tq and For Sale*** Time for a new project!!
    Reply With Quote Reply With Quote
  7. 12-08-2004, 07:43 PM #7
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    Stock main was a 153.8 and Dynojet recommends a 155. From what I have seen before I jumped to a 160 and the result was right on the reference line. This is why the air/fuel module is such a great tool. Overall I think that with the mods that were installed we gained some usable power.
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    ------------------------------

    My 440ex Mods: 12:5 Comp, White Bros. XC Cam, DRG Ported Head, DRG EXR Prototype Filter, Airbox Lid Off, 450r Carb, LRD Pro 4 Ballistic Full Exhaust...
    *Jetting: 3 turns out on the Mixture Screw, 48 pilot, Needle in the 3rd from top, and a DJ 170main*
    -----------------------------------------------
    Up to 42hp-30tq and For Sale*** Time for a new project!!
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  8. 12-08-2004, 08:01 PM #8
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    sweet deal!



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  9. 12-08-2004, 09:42 PM #9
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  10. 12-09-2004, 05:15 AM #10
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    Thanks for the reply's Nice bike bman
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    ------------------------------

    My 440ex Mods: 12:5 Comp, White Bros. XC Cam, DRG Ported Head, DRG EXR Prototype Filter, Airbox Lid Off, 450r Carb, LRD Pro 4 Ballistic Full Exhaust...
    *Jetting: 3 turns out on the Mixture Screw, 48 pilot, Needle in the 3rd from top, and a DJ 170main*
    -----------------------------------------------
    Up to 42hp-30tq and For Sale*** Time for a new project!!
    Reply With Quote Reply With Quote
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