Everytime I ride my bike for like maybe 5 or 10 minutes, when I pull the clutch in my bike will start revving really high and the revs will starting bouncing. I've got the NT carb by the way. I have tried adjusting the idle screw but it's either too high or dying no matter how I adjust it. I'm thinking maybe it's my offset intake manifold causing the idle issues or possibly an air leak but nowhere on my intake manifold is there oil leaking and I tried using propane to find an air leak but didn't really see the idle change from that. Help! I have no idea what to try anymore