I have just been looking over the scoot and found something that has me wondering, "Whats-it?". It is located on the throttle body behind the air filter. My guess is some type of vacuum line used for testing. The problem I see is that the small rubber cap over this line is deteriorated and may not be sealing whatever it is suppose to seal. What is purpose of this line/tube? 2003 Softail I have attached a pic of the line and rubber cap.