Excellent results from testing settings on the EFI settings...

On my 2010 TXC250 I went from 100 to 96 on the low setting on the EFI and gained better running and great mileage. Amazing the difference it made. I am getting 32-34 MPG now and I think there is more to be had. I'm stoked by these findings. More to come.

Went 4% leaner on the bottom setting. As you are in the bottom setting a lot in tight single track it made a large difference in MPG. The bike is also breaking in. You can feel the suspension getting better and the motor getting more free. I believe it still wants to be leaner, testing continues.

Was out playing with the EFI again tonight. I am at 90 on the low CO setting now and it seems to run even better. Also went to 104 on the mid setting and 100 on the top setting. Better mileage is sure to happen. This is EZ and fun to mess with.

A couple of things to that point. The huskys (and Berg to some extent) come real lean, throttle stop, restricted filter cage and other things to make it run super lean and pass regulations and get by red sticker and EPA stuff. Some of this is carry over from Europe. Once you remove the restrictive crap and take the lamba sensor out you have the "race map" which is a richer setting. One go around with iBeat and your right it is all good to go. I got the $300 iBeat stuff because i wanted to explore the EFI potential and have the ability to tune for pipes and such. As much as a learning experience than a necessity. It's been interesting and fun to play with. I gained better performance and better MPG and learned a lot so far. It is ridiculously EZ to recalibrate once you have it and is liberating. You can do the equivalent of the pilot, needle and main in about a minute. There is also a bunch of other useful information in there.

In the end you are right, the dealer can and will set it up and your done unless you have an issue. I wanted to learn and have the ability to try stuff so i got the setup to do that.

Thanks Walt, it's interesting to mess with. Ran 92 on the low (8% leaner) and it was very good there and will get better mileage. Any less and you start to get a hesitation. Yeah, EFI on the 2 stoke would be cool for sure. the ultimate would be it it had a sniffing feature that would log as you rode then you could see exactly what was happening.

BTW i need to get back on the 125 and start playing with that, got some things brewing. Want to play with your springs as well.

SA insert in. 50-3000 feet.

Yep, should not matter temp or altitude.

I am currently at 93/102/104. Great performance and mileage. Obviously the 310's are a lot different in many ways so this will not translate. Might not even work well on other 2010 250F bikes, dunno. Does work excellent on mine.

throttle is still semi abrupt and does not like huge handfuls at very low RPM but once i got my head around that I just don't whack the throttle open 2 stroke style and it works great. A G2 throttle tube with a slower initial response might be the ticket. pretty happy with it as is.

When i am not spending all day on slick clay uphills going no where I am getting about 32 MPG. Still only about 45 miles a tank. I pack a half gallon and do 55-60 mile rides no problem. Dump it in 17 mile out and don't have to pack it any more. It really has become EZ to do and am happy i can do 60 miles. I love this bike so it is very much worth it to me.