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JD Needles from 06 WR250F to 06 WR450F

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Hi

Would any one out there know if the JD needles off a WR250F will suit the same year 450.

Is it just the jet sizes that differ and same needles or are the needles completely diffetent shape. (thinking of throwing the red one in to see what happens)

Thanks

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Use a YZ needle ($13-$14) in your 450. you will save a bunch of money and be much happier. I messed (had them for two years) with JD needles in my 06wr450 and it never was right. I tried every combination possible. I had surge big time. i just put a YZ needle in it and it runs great now and no surge. The bike now deals with elevation changes much better IMHO:thumbsup:

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Might give it a go, thought about throwing the 250 red needle in to see what happens, but am a bit concerned that, what happens is not going to be good.

What jets are you running?

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