Hi, if you buy a Brembo overhaul kit, it comes with a new piston, seals, dustboot and round clip. I prised the clip out with a screwdriver after cutting away the old dustboot, the clip and boot are both damaged on removal but is not a concern as new ones are supplied in the kit. Behind the round clip is a white plastic scraper seal and O-ring, all supplied in the kit. Bleeding the clutch can only be done by removing the handlebar and tilting at an angle to eliminate the air bubble from the banjo bolt and just gently pressing the handlever until the air bubbles are released.

Thanks for the advice. I've previously completed the rebuild and am happy with the results. The only unfortunate thing is that when prying out the retaining ring, the aluminum body of the MC is easily scratched. For anyone else who needs a Brembo rebuild kit for either the brake or clutch master cylinders, or new (NOS?)brake calipers, check out http://www.bevelheaven.com. Although they cater mostly to the older bevel-drive bikes, they carry many Brembo items that are the same as on the Paso.