Hey guys,
Went for my first real ride on my 09 WR 125. I had put half a dozen heat cycles on the bike last night and this morning, so it was time to go for a ride. My jetting that I had for the ride:
460 main
kit needle with clip in the fourth position from the top
30 pilot
#4 slide
Took it pretty easy for the first 10 miles or so letting it cool down twice after about 5 miles each time. Then it was time to let it go and what a blast. If the TXC 250 handles as well or better than this I want one no matter what I have to do. That would make a great tandem in the garage. I am an old fat guy and what a stress free ride. Hardly broke a sweat in 85 degree weather.
I did a WOT chop when I got back to the truck to check the main jet. I had pulled the plug during the ride and it was OK. Pilot was a tad fat and I put in a 27.5, mid-range was spot on. That WOT chop was way to light brown for my taste so I went to a 470 and got a much better chocolate brown and it still runs clean. So after the ride before I did any jetting I refilled and computed fuel mileage= 27.5 mpg. Now granted I took it pretty easy the first 10 miles but the last 20 were smoking for me.
My only issue with the motor is that there is 1000-1500 rpm gap between the top of the mid-range pull and when the power valve starts to open. It makes riding a bit tricky on steep crap because the second you back off for a second the bike falls below the pv opening rpm and then labors to pull itself back on without dropping at least 2 gears and clutching the crap out of it

Not so bad everywhere else because the mid range is surprisingly strong for a 125 and will pull most moderate stuff.
Did Husqvarna get a batch of too stiff springs that take any progressive opening of the pv away? It is very abrupt with the pv opening all the way virtually immediately once you attain enough rpms, which wouldn't be so bad if it happened 2000 rpm earlier instead of at 9000rpm.
Any thoughts,
Walt