Hello, I have been trying to resolve this for a few days now. Bike: KTM exc 125 2-stroke My bike accelerates perfectly after a bit of warm up, that is only on a straight road though. If I try to pull a wheelie for example (full throttle) as soon as I get the bike up it does the famous "bhouoo" sound as if the carburetor cut off the mixture to the engine. Same problem when I go off road and the ground is "angled" from place to place, it starts acting up, and afterwards it cannot reach high RPM untill I run it on straight ground for a while. Any Ideas?