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Needle jet length much different

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Hey!

I'm working on jetting my kx250f for high altitudes - it originated at almost sea level and I live at 8k. I'm on the needle and ran into some confusion upon taking the old needle out. It is almost twice as long as the nedles in the jd kit I have. Do I not have the right needles to replace rhis with or is it ok to switch these out even though they are different lengths?

Thanks

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Looks like you got 2 stroke needles to me, they wont work in your 4 stroke. You need to contact JD at Jdjetting he will get you straightened out.

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Ahhh. That makes sense..

Are the main jets the same between 2 and 4 stroke? They look the same and fit. I already put in one of the main jets I had in this kit and would rather not take it out if not needed.

Thanks!!

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