Please like and subscribe if you found this video helpful. This video is about to go about softening old rubber CT90 air cleaner boots that have hardened with age. Its a fairly straight forward process that gives excellent results. I did a post on my blog that provides additional at the following link: https://ct90restoration.blogspot.com/2018/02/a-way-to-softening-up-old-rubber-ct90.html Here is a link to the main page of my blog on CT90's that includes a number of posts on various CT90 issues, assemblies, etc. https://ct90restoration.blogspot.com