MPG is the problem with a Yosh or Tika map change as they add fuel over a larger area... The NEW ECU will have a properly designed efficient map with changes in fuel and probably TIMING. Something the Yosh and Tika box can not do.
The map in the new ECU is done with a lot more precision than just dumping fuel. Having your MPG go from 47 to 35 is BS! Even 45 to 40 is not acceptable to me.
I will zero out my Tika changes and get the new ECU. THEN if it's still lean I will make some adjustments.
If we had access to the equipment the factory has we could make the bike run correctly AND get MPG. Like the 650.
I think it's silly if you can get a new ECU for FREE not to. Mine has the Tika "fix" but at a sizable cost at the pump.
I would LOVE to see a dyno of a stock 05 and a stock 06 DL1000 and a few riders reports who have ridden both. A MPG comparison and a trip report would tell.
If the new map kills the midrange than the TIKA or Yosh for to the old ECU maybe better... But I think the new ECU is the better fix than the band aid to the 0ld ECU's
Not that the yosh and Tika changes don't work. But is it the BEST fix?
My guess with a gas analyzer, a dyno, and a few million $s of equipment can make a better map than a $500 box and a few trys to get a setting that feels ok by only changing the fuel. CLick click yep that should do it. MMMmmm what's that gas smell?
A mapped correctly bike will get better MPG not worse. If it drops 3-5 mpg it's wrong IMHO.
Both my remapped car and truck get better power AND MPG. By relieving the lean run condition the power went up so less throttle is needed. (unless you put you foot into it.)
Summery... If you CAN get the new ECU for FREE under warranty do it!
If you can't than live with the yosh solution and try not to be to heavy handed when adding fuel when you do it, less can be more.