Lambretta Master Cylinder No Notch Headset Modification

Short video on modifying a Lambretta headset perch so that you don't have to notch the side of the headset when installing a hydraulic front disc brake.
pistonported.com/
This modification is only necessary when installing a hydraulic disc brake on a Series 3 or GP/DL Lambretta when you do not want to modify an original headset.