Ok so Ive installed PCV and AT, I loaded the 2009 450 map with power up kit. Set the trim to 25%. Everything runs fine for a bit, Ill go for rips and go in power commander, get map, accept all trims and then send map. Everything runs good fer somewhere around a week and then the bike starts backfiring and kinda surging. A couple weeks ago it was really bad and loaded a fresh map and it was fine for days. I checked the valves and gave it a fresh oil change, pulled the fuel pump to see if it had slid up just dont know whats going on
25% deviation/adjustment range is huge. My guess would be you are getting trimmed to some extreme ends of the spectrum. While the 2008 bikes could use up to 33% reduction in some spots, that could be achieved using a 10% autotune adjust over time while periodically accepting trims. A 2008 te250 got in an 'interesting' position while having the autotune adjustment range set to 20%, and having previously accepted trims - it did not run. The 2009s should not need more than 15% total changes based on the testing we did at dynojet, 8% would be typical. But I was told by a well respected dealer, that the bikes vary....
G8R You might want to check what your fuel table looks like after accepting several trim values. I noticed on mine that at 2% and 5% colums that AT kept trying to lean it to the point it became way to lean and then surged at low speeds. I used the 20% value for accepting trim limits. Dynojet recommened that I input "0"s for the values in the 2% and 5% colums (basically that turns off AT for those colums). Haven't had any problems since.
I set to 25% just for the initial run and then reduce it to 10%. I will start with a fresh map and start at 10%. Should I run the 0 map or go with the one set for the power up kit? Thanks!
These things are extremely difficult to describe by typing, but if you allowed the bike to initially adjust 25%, accepted trims, then reduced it to 10%, that should have worked pretty well. The idea is to not have the trim set to a high % number when going on 'exciting' rides so as not to trim to a strange value - there are other ways to handle the issue too. If you want to start over which map you start with really should not make a difference. If you want a more in depth discussion, you could always let us know what the trim values are before and after certain things are done. A 'print screen' of what you are seeing on your computer, pasting that into microsoft paint, then saving as a jpg - would allow you to share trim values. It has been a long time since I've done any efi / PC / autotune work in person. You could also attach a trim map to a post - but... relatively few have the Power commander software to read that file.
