So I bought a 2000 400ex about a month or two ago, fixed the major issues and the bike was running fine for about a week. I went to go trail ride and I pinned it down the road to feel it’s power on the way. After fully feeling the power I began to ride the bike threw the trail and it was not running right. It’s bogging after about 1/2 to 3/4 down on the throttle and when it begins to bog the bike slows down and will SOMETIMES get random spurts of power. After this happened I removed my carburetor and cleaned it all out and made sure all seals were tight to keep no air seeping in or out. I also put in a 162 Main jet and 42 pilot thinking it may help. When I replaced the jets it began to run fine for about 15 minutes and went back to running like crap. Please help, thanks.