Dynoing the 505sx
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  1. #1
    Senior Member Member
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    Mar 2015
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    154

    Dynoing the 505sx

    Put everything back together yesterday, installed fast ranchero float bowl with leak jet, swaped the acclpump spring for the ktmsx upgrade spring i found on rocky mountain atv, removed sparky from the hmp competition slip on, and to finish her off i slapped on the fuel customs intake.
    Now considering it takes about 15 to 20 minutes to remove the plastics remove the carburetor and all the wiring, unplug the fuel each time we want to make a change, I thought I would get your input and see what would be a good baseline to start with. Were at 3600 ft and I was thinking starting with a 48 pilot and a 180 Main
    2009 450sx
    PEP ZPS pb-1s
    JB Pro a arms
    DirtFiendAZ motor
    -41.5mm carb
    -thumper tube/dual squirt AP nozzle
    -crankworks crank
    -stock compression cp piston
    -ktm water pump upgrade
    titanium fmf megabomb header
    custom headed matched fmf silencer
    fci intake with air box cut out
    Quad tech hood
    Walsh hiem tierods
    suede +1 jetrim seat
    all the orange bling/orange hoses
    Flexx Bars/AME 1.3 grips
    Ohlins stabilizer
    xc reservoir
    -the6mods-

  2. #2
    Super Moderator KTMATVHQ Addict
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    Apr 2013
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    New Mexico
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    I would think you aren't too far off. Should be on the safe side, a little rich if anything, and that's a good thing. Try that and then a 175 main and see if you notice a real difference.

  3. #3
    Senior Member Member
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    Mar 2015
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    154
    The 505s come with a 45 pilot and 175 main.. Thougt a 48 and 180 would b a good starting place... Does everyone use the stock needles or is there sumthin brtter out there?
    2009 450sx
    PEP ZPS pb-1s
    JB Pro a arms
    DirtFiendAZ motor
    -41.5mm carb
    -thumper tube/dual squirt AP nozzle
    -crankworks crank
    -stock compression cp piston
    -ktm water pump upgrade
    titanium fmf megabomb header
    custom headed matched fmf silencer
    fci intake with air box cut out
    Quad tech hood
    Walsh hiem tierods
    suede +1 jetrim seat
    all the orange bling/orange hoses
    Flexx Bars/AME 1.3 grips
    Ohlins stabilizer
    xc reservoir
    -the6mods-

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  5. #4
    Senior Member KTMATVHQ Addict
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    May 2009
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    Yuma, AZ
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    I think a lot of guys use the hrc kit. I have one if you want to go that route.

  6. #5
    Senior Member Member
    Join Date
    Mar 2015
    Posts
    154
    Yep ur right, the hrc needle is what fast ranchero uses, how much?
    2009 450sx
    PEP ZPS pb-1s
    JB Pro a arms
    DirtFiendAZ motor
    -41.5mm carb
    -thumper tube/dual squirt AP nozzle
    -crankworks crank
    -stock compression cp piston
    -ktm water pump upgrade
    titanium fmf megabomb header
    custom headed matched fmf silencer
    fci intake with air box cut out
    Quad tech hood
    Walsh hiem tierods
    suede +1 jetrim seat
    all the orange bling/orange hoses
    Flexx Bars/AME 1.3 grips
    Ohlins stabilizer
    xc reservoir
    -the6mods-

  7. #6
    Senior Member KTMATVHQ Addict
    Join Date
    May 2009
    Location
    Yuma, AZ
    Posts
    593
    Idk yet. I bought it a while back and never used it but opened the package to look at the number on the needle. I dont remember what I paid for it.

  8. #7
    Senior Member KTMATVHQ Guru
    Join Date
    Dec 2008
    Location
    Billings, MT
    Posts
    1,047
    The HRC kits cost $20-$25 new. That's what I'm using too. The HRC needle is a bit richer. I'm running a 170 main with it at 3100'. A 165 works with it too and might be better on the dyno, but I noticed the 170 seems to be a little better for sustained wide open throttle in my particular machine.
    Mine:
    2017 Husky FX 450
    2009 505 SX
    2008 525 XC-modded for mx (currently 450 cylinder)
    Dad's:
    2009 450 SX
    2008 540 XC

  9. #8
    Senior Member Member
    Join Date
    Mar 2015
    Posts
    154
    for the record the letters on the hrc needle are NGPR according to fast ranchero
    2009 450sx
    PEP ZPS pb-1s
    JB Pro a arms
    DirtFiendAZ motor
    -41.5mm carb
    -thumper tube/dual squirt AP nozzle
    -crankworks crank
    -stock compression cp piston
    -ktm water pump upgrade
    titanium fmf megabomb header
    custom headed matched fmf silencer
    fci intake with air box cut out
    Quad tech hood
    Walsh hiem tierods
    suede +1 jetrim seat
    all the orange bling/orange hoses
    Flexx Bars/AME 1.3 grips
    Ohlins stabilizer
    xc reservoir
    -the6mods-

  10. #9
    Senior Member KTMATVHQ Addict
    Join Date
    May 2009
    Location
    Yuma, AZ
    Posts
    593
    Quote Originally Posted by Dr.Dabameros View Post
    for the record the letters on the hrc needle are NGPR according to fast ranchero
    Yes, the 06 and up HRC power up kit part number is 16020-nlz-610. The kit comes with needle NGPR, 162 Main Jet and 55 Leak Jet. There is no pilot jet in the kit. If you want the one I have, I would sell it for $25, and I pay postage and Paypal fees.

  11. #10
    Senior Member KTMATVHQ Addict
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    May 2009
    Location
    Yuma, AZ
    Posts
    593
    I also have the KTM Powerparts A/F factory screw (59031017200) if you are interested. It is brand new never used. I got it then ended up using a differrent one. $20.
    Attached Thumbnails Attached Thumbnails Dynoing the 505sx-image.jpeg  

  12. #11
    Senior Member KTMATVHQ Addict
    Join Date
    May 2009
    Location
    Yuma, AZ
    Posts
    593
    On its way......

  13. #12
    Senior Member Member
    Join Date
    Mar 2015
    Posts
    154
    Damm that was fast!!! awesome brutha, thank you again!
    2009 450sx
    PEP ZPS pb-1s
    JB Pro a arms
    DirtFiendAZ motor
    -41.5mm carb
    -thumper tube/dual squirt AP nozzle
    -crankworks crank
    -stock compression cp piston
    -ktm water pump upgrade
    titanium fmf megabomb header
    custom headed matched fmf silencer
    fci intake with air box cut out
    Quad tech hood
    Walsh hiem tierods
    suede +1 jetrim seat
    all the orange bling/orange hoses
    Flexx Bars/AME 1.3 grips
    Ohlins stabilizer
    xc reservoir
    -the6mods-


 

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