It's very tight, but it'll go in. I remove not only the tubes, but the rubber sleeves they slide into. Make sure the two small hose barbs/fittings on the left side are removed. It's best to attach the breather hose that goes from the airbox to the frame fitting just behind the steering head before you install the box. It goes without saying, battery out, 'box mounting bracket off. Even after the box is in, it's still a PITA to get the tubes attached, etc.