125-200cc 144 kit jetting - playing with needles...

So I had a few hours of light left yesterday and ran up to a local area to play with some PWK needles for the fun of it. JD red in the middle position installed and working great. did a lap to get a base line feel. installed a CCJ needle. Ran real good, smoother pull of the bottom, more liner power but seems less snappy and down a little on mid power. Tried the DDJ and same as the CCJ but a bit less everywhere. back to the JD to make sure and RIP. The JD red is obviously the most powerful on my bike. Almost to the point of being to much when on the pipe. Hold on. this 144 is working out VERY well. the CCJ would be a good mud / slick needle. Ran great just smoother and less violent hit. The JD Red RIPS hard and was my favorite for the dry conditions we have now.

09 WR125 with OEM 144 kit
04 Doma CR125 pipe
PS SA muffler
PWK 38, 175 main, 45 pilot and JD red in middle position

I ran the same jetting/needle/position as you, except for a #8 slide, and I'm running stock PV springs with the PV arm adjusted 1/4 from the top. I tested the 144 for the first time a few days ago at about 3000'-4000' and it ran like a top! It was a little rich yet, but that was pretty much by design. It is doing exactly what I want it to do, which is climb effortlessly without drama. Lots of useable power from top to bottom with no flat spots anywhere. I'd prefer it to be just a tad more quick to rev off the bottom, with maybe just a bit more snappy throttle response, but it's not really an issue unless I decide to race it. I'm quite pleased with the package and am looking forward to riding it at about 7500' next week with a few jetting changes




WoodsChick

Nice, was waiting for your report. Glad you like it.

interesting. Absolutely no mid range flat spot or bog in mine. Stock it was somewhat flat int he mid, now thats where it makes a lot of power. Pulls hard from idle to last RPM. Not real hard on the bottom but then again it is still a very small motor, can't expect a ton more.