In this video, I trace the fuel and vacuum lines after they have been upgraded on a Taotao ATM150-A Evo GY6 150cc Chinese scooter. It's a good idea to upgrade these lines because the stock lines are prone to deterioration within a few months, and a leak could leave you stranded. These lines are high quality Helix vacuum line (blue) 3/16" x 3' and Helix fuel line (red) 3/16" x 3'. Of course, you can choose your preferred color and brand for each. The nice thing about these lines is that they're translucent so you can see if you're getting fuel in your vacuum line and make sure that fuel is flowing in the fuel line.

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