ok heres what i have,its 2002 kx500 i picked up 3 months ago. the bike has a pc header and pipe on it with boysen reeds,and ran great (power up 3 gears without trying)the first two times i rode it. the next time i took it out it will not power 1st gear. so my mech took it apart (we saw oil from case )and replaced the crank case seal,oil seals and replaced the piston rings while we where in there. he also cleaned the kips, they where covered with carbon build up. well put her back together and still dosen't run as good as she should,has good mid but is not rev or pull on top end. i saw 1 post said they had black sluge,so i lowered the needle to lean out top. i am running 165-58-1.5 turn on air-2nd clip on ned. i saw someone else say kips out of time, how would i check (any websites can go to ref).i am at 1000 asl, any ideas would help me out. thanks