when im on the road cruising on the road say around 80-90 km/hour and light throttle the engine surges up and down a bit, almost like it's still a bit lean. I have done the free type mods and done the jetting as per the sticky here but it's just not quite right. Also on a decel wnen hearing down i still get a scattered backfire. I also get a backfire if i hit the throttle and rev up the enginge quick and let go of the gas i get one backfire. finally if im at idle and hit the throttle fast she will stall out or bog,bog, bog then rev up. Any ideas, this is not a problem just some fine tuning i think will make it better, so im wondering where to go now, anyone have similar issues on their 06 WR450 ???