125-200cc 2012 Wr 125 Jetting

does anyone know the correct jetting for 2012 wr 125 uk model. its got bit of a flat spot between bottom and midrange. its currently running on 450 main jet 45 pilot and the needles on the third slot down. any help would b brill

Check out the 125 jetting sticky

You need to adjust the powervalve and install a richer Suzuki needle. Order a Mikuni TMXX needle (6CHY16 - 62) find a 5.0 slide.

You will probably have to go to a 35 pilot after those mods.

Wanting jetting input for '12 WR150:

Just about got it dialed but still getting lots of splooge from pipe.

Running Maxima Super M @ 40:1 on pump 91.
Elev. 1500-2500'
Temp. 50-75
5.0 Slide
32 pilot
2.5 A/S
460 Main
6CHY16 - 62 Needle #3 position

Pic of plug after last ride below. Jetting feels pretty tight except still a little blubbering on very bottom (slight), but like I said lots of pipe splooge. I'm hesitant to go much leaner. How does the plud to you all? Do I just have to live with the splooge because of Turbinecore II?

spooge has little to do with jetting, more about how you are riding. Plug looks good , could go to a 27.5 to a 30 pj based on your a.s. at 2.5 turns

I've found that what ever pilot size results in the air screw being about 1 1/4 turns out is the best, so like TROFFER88 says try the 27.5

The plug looks a little rich but it might only be rich on one circuit and that's where it's getting the rich reading.