I've got a 2007 SMR 510 and they came in Euro 2 and 3 varieties. The Euro 3 version has a tube that runs from the intake manifold between the carb and the engine, to some sensor in the airbox. My intake manifold was cracked, so I replaced it about a year ago. Not it's torn again and they no longer make the Euro 3 style. Should I take the time to try and drill a hole and fit the vacuum tube or should I just eliminate it? Does anyone know what the sensor does and how it could affect the operation of the electronics?