If you have opened up both intakes on the front of the cowl that could be a problem, I only open up the one in front of the cylinder and leave the otherone blocked off. My 2.10 in a edge gave me problems until I blocked off the one side. { I assume that the motor is mounted side ways }. This allows air to only enter and go accross the engine, if you open up the other side all the air will go through it and not over the engine.