I give up. O7 wr450 with the bogg 1/4 to 1/2 throttle. I have been chasing the problem for a month now. It had a 162 main, 68 pilot, 70 air jet and did not check the leak jet yet. I did change to a 168, and did the oring mod and put two shims under the stock non adjustabe needle. It seems to have lost power and the bogg got a little better. ANy ideas, I am at 500-1000 ft at sea level.