125-200cc 09 WR125 jetting and fuel mileage comparison (2 WR125's)

What kind of riding was it? If you spent a lot of time in the low mid and on the pilot circuit, it would make a big difference. If you are both ripping all the time, not so much.

I get over 30mpg on my 360 and only about 25 on my 250. Both are jetted almost identically with pwks, but you just don't need to crack much throttle on the 360 to go way to fast. So it also makes a difference on how you ride and how well you control your throttle. I realize this is obvious, but tell that to the nascar guys who lose on gas mileage.

FWIW
Walt

Do you think the two different pipes might have something to do with it? I get my WR 125 on Monday, but I don't get the replacement pipe for another couple of weeks.

Kelly, I sent you a pm about the mount you made for the roto pax mount. I can go heavy, but would like to make it as light as possible and have it still take the abuse. Please advise about what you used.

Can't wait to rip on mine,
Walt

Is he one the pipe and wide open all the time? The only other thing I can think of is his float might be too high and causing a lot of loss.

how you ride has lots to do with gas milage.

gearing, tires, tire pressure, chains, body weight, load weight, if one of you has an auto clutch. all that can make a difference.

its a 125 2 stroke, its not going to get great milage regardless. i knew mine was going to get crap milage. my 250 was worse then my 400, so i wasnt shocked when like i expected my 144 gets worse milage then my 250. your wrapping them out to make power so your using more fuel then you might be used to.

Kelly weighs more...

maybe he is using less gas on the downhills...



Later,

Kelly,

How did you like the new motoz you installed? I think it was the tracula.

Walt

What size did you put on and which is your recommendation for the WR 125 in semi-similar stuff, probably a little rockier and looser.

Why don't you trade bikes for a day?

What one are you going to put on the new 390?



Later,

Jake...are you back to a trials tire?

Busted

Not yet on the husky.

Later,

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

PV Spring

Wallybean, took my pv spring out, held it to a grinding wheel, and took some metal off the outside of the spring, made it a little easier to open. Just a guessing game, but it worked great. The other european competitor offers opitional springs for there 2 st. I'll bet Husky has a box full of different weight pv springs. Be nice if they offered them in there race catalog.

How do figure your rpm numbers?