Hi All, Was wondering if any one had some advice as to a problem I'm having. I have an SSE with an Evo. .46 built from a kit. The fuel tank is the recommended Du-Bro for this build. It seems that at 1/2 to 2/3 throttle I get air bubbles in the fuel line and the engine starts to porpuse in rpm. Go to full throttle and it seems to run fin. I seen these bubbles on the bench with it running. I have had to dead stick it when it quit on me at 1/2 throttle. the tank has been pulled and found to have a stopper that I thought was kinda loose, but not leaking. Rechecked all plumbing and reinstalled and I still get airbubbles at part throttle operation. Any Ideas?? Thanks in advance, Joe.