Here is what I have: Building a 350x out of misc. parts. The air box hasn't been on a trike in many years. The tube that connects the box to the intake side of the carb is hard as a rock. It also has aparently srunken as it aged. It is too small to fit the carb. Too stiff to stretch. Will not go on even when coated w/ grease. What can I do to make it flexable again? This is holding up the whole project. Thanks for any and all help.