250-500cc Another WR250 Jetting Question

My 07 WR250 came with 2 needles. A -60 and -61. Is the -60 the richer of the two needles?

Lay them side by side. Richer circuit = skinnyer part of the needle.

One should be obviously skinnyer in parts than the other.

Yes, the 60 needle is 0,01mm thicker.

look at the NEEDLE, not the number.

Thicker needles, for a given portion of a circuit, are LEANER.

Thinner is richer. It's a smaller "plug".

Lay them side by side and compare the portion of circuit you are concerned with. One may be inherintly leaner for a given portion of a circuit as opposed to/or richer everywhere.

I was thinking the number was some kind of diameter measurement and the -61 was thicker, therefore leaner. I will just have to try and mic them.

It´s the opposite of course! Mixed it up! Sorry!

Just get a JD Jet kit, no more messing around, all I seem to have to do is ajust the needle, of course it's still cold out.
I put the red needle in, it comes with a new needle jet, I have a 32.5 pilot and a 400 main, right now it runs a little rich on the needle and maybe the main but I am hardly on the main, mostly 2nd, 3rd in the tighter stuff lugging it for traction and smoothness out of corners

I ran a Honda CR250 needle jet with the JD needle

I always measure mine and compare to the one I'm replaceing. They can vary from batch to batch.

JD's are custom made. I've seen variance's in those as well.

Personally, I've had excellent results with the OEM Mik/Keh components.