Hi. I recently purchased and installed a new air box from Dr. ATV. Fits great, perfect colour, all good except it doesn't have the oil drain and crankcase breather plumbing connections like my original one did. I eliminated the oil drain tubing but what to do about the crankcase tubing? I rerouted it to the left side of the engine and down the side, but should I leave the end open or plug it with a bolt? Is there any issue with eliminating these connections?