A little history, bike had slight surging and occasional misfire/backfire through intake off idle when new. At 600 mile service all normal checks performed as well as new ECU (not sure if mapping was different than stock), close attention paid to TBS (I have again readjusted to make sure it was spot on).
Bike runs great, no surging great power delivery at below 3k. When DP kit was installed with DP ecu bike was running a bit on the rich side, after I took kit off, bike again ran great. I now have the DP pipes on loan and with the DB killer removed bike again runs great. Solid idle, no surging pulls from around 2,500 with no problems, no intake backfiring. As you know the DP kit includes removing the O2 sensor, my sensor is in place and bike runs great. If I could find some DB killers or inserts it would be great as this is the combination that I was looking for and much less expensive than the full DP kit.
2005 Gas Gas Trials