Air intake hose -LAMBRETTA SH18/20- LI (3rd series), LIS, SX, TV (3rd series)

Installed on the LI/LiS/SX/TV models.
If you don't want to do without the original look and improved performance, you can install PHBL carburettors without having to do without the tube of the overflow valve.
Alternatively, you can use the intake hose of the GP 125.
This keeps the area under the left side panel clean thanks to the non-existent overflow valve.
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