Hey guys, need some help. Awhile back I posted about how my 2012 YZ 450F would die when you push the "choke" all the way in, and how it surges at high rpm.. Well I brought it to the dealer, and they replaced the tps and said the bike was fixed. Well after a total of an 8 hour round trip, not one of my complaints is fixed. The bike still dies when you push the chock all the way in, and it still has a surge at full throttle. Could they have not set something right and thats why the bike is still surging? If I hold the throttle pinned for 2-3 seconds the bike surges.. My buddys 2010 yz 450 absoulty smokes mine with how it runs right now. Makes it look like a 250f. Any idea? Could this be the beginning of my fuel pump crapping out? Injector? My valves are within spec so I know thats not the problem. I am stumped and pissed at the moment. Any help is appreciated!!