I have used clear fuel lines for years and as long as its not vinyl, you should be good. I use the clear ploy lines to see if there is ever a fuel issue. I do live in Az and I have never had a line get hard or break yet, and it has been at least 3 years on some of my skis with the clear lines. If you get good stuff, you will be fine. The lines will last longer then your carbs will need cleaned/rebuilt..... As for the color lines, dont know, only have used the clear lines. This is on all the 2 stroke motors, 580 657 717 787 951............