NT carb - basic and speed jet size

Discussion in 'Intake & Exhaust' started by Chaz, Nov 6, 2016.

  1. Chaz

    Chaz Member

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    I've done some research here and am still unsure about whether or not there is a different size jet for the stock basic nt carb compared to the nt speed carb. Has somebody measured? I don't have the tools to measure myself.

    thanks,

    Chaz
     
  2. MotorBicycleRacing

    MotorBicycleRacing Active Member

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    I found that they were the same, 70.
     
  3. Chaz

    Chaz Member

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    Thanks for the reply, MBR. I guess I'm going to have to get a pin vise and micro bits to dial this thing in.
     
    #3 Chaz, Nov 7, 2016
    Last edited: Nov 7, 2016
  4. Agreen

    Agreen New Member

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  5. Chaz

    Chaz Member

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    Thanks for posting that link, Agreen. I can see the throat is bigger on the speed carb if I look at them side by side. I was hoping the stock carb had a smaller jet.

    I suppose I should just bust open my wallet and get my yz80 expansion chamber put on. If I do that, with any luck I might get away without having to change jets.
     

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