I recently put a new carburetor on my china girl. She's now actually running! But the problem is that I don't think I'm getting as much power out of her has I should. On my last carburetor the engine was most powerful when the air intake lever marked with Chinese symbols was all the way to the top. Now, with the new carburetor, if I put the lever all the way up the engine dies. I can have it at about the halfway point and it will run, I just want more power. Anybody got any ideas?