JD needle specs
Posted: 08:21 pm Aug 14 2022
fixed it. there ya go.
The needles in the KDX jet kits are in the same range as CEK/DEK single taper needles, but ours are custom machined triple tapered needles. They are precision machined and give a more even flow of power than standard needles, but do not get excessively rich like N85D type needles. There are 2 needles in the kit, which span either side of CEK/DEK with slightly richer and slightly leaner straight diameters. The Blue marked needle is for lower elevations and cooler temperatures (richer), and the Red marked needle is leaner on the straight diameter for warmer conditions or slower paced riding, but not excessively. Yes, these are special needles, as I've spent years developing and refining the taper angles and lengths to make them perform in varied conditions without being as sensitive to changing weather and temperatures compared to stock needles. The needles will work well with the RB modified carburetors.
Perfect!canyncarvr wrote: ↑03:51 pm Feb 27 2024 No fun like the fun of posting to a years old thread...but this thread DOES seem like a good place for this to be. Put. It is elsewhere on the forum, but with a title of 'JD needle specs', here it is again. Also note: This post has nothing to do with the actual 'specs' of the JD needles!
This from James:
The needles in the KDX jet kits are in the same range as CEK/DEK single taper needles, but ours are custom machined triple tapered needles. They are precision machined and give a more even flow of power than standard needles, but do not get excessively rich like N85D type needles. There are 2 needles in the kit, which span either side of CEK/DEK with slightly richer and slightly leaner straight diameters. The Blue marked needle is for lower elevations and cooler temperatures (richer), and the Red marked needle is leaner on the straight diameter for warmer conditions or slower paced riding, but not excessively. Yes, these are special needles, as I've spent years developing and refining the taper angles and lengths to make them perform in varied conditions without being as sensitive to changing weather and temperatures compared to stock needles. The needles will work well with the RB modified carburetors.
So I have all 4 needles.Slick_Nick wrote: ↑06:44 pm Sep 18 2023 I never liked the JD needles. CEK or DEK for me depending on the power delivery I’m after.