First and foremost hello everyone I'm Steve thanks for viewing and offering any helpful insight. A little background so everyone knows I bought this KX off craiglist for 800 bucks starts wont accelerate. Heres the haves After cleaning the carb thoroughly and reassembly problem still persisted so I proceeded with the following removed cylinder head check that the piston was in the right direction Checked valve clearance and re shimmed as needed Retimed the motor replaced the upper gaskets for air leaks replaced both exhaust gaskets the one at the head and the one at the slip on re built the carb all new gaskets, jets, needles. Settins are 42 pilot 180 main 3rd clip from the top on needle 50 leek New Pro circuit aluminum hot start connector to carb sealed. sprayed the motor with starting fluid to check for air leaks around the carb or gaskets Here is my problem Bike fires instantly first kick every time choke on first start of the day never needed again. Idles like a pro idle and 1/8 throttle perfect as soon as you break 1/4 throttle it hits the rev limiter.... or so it sounds there is no way this is carb jetting or timing or clearance. the muffler has 3, 1/4 size holes in it midway were some fat ass bottomed it out and hit the rear caliper. ( I believe them being in the muffler would not cause this ) I am leaning towards CDI or TPS maybe crank sensor anyone else heard of this seen it? Any ideas?