GT860 front brake master cylinder rebuild

Post your 'Wheel, Brake & Tyre' FAQs, comments & questions regarding Ducati motorcycles here.
Post Reply
pouchy750
Cucciolo - the Lil Pup
Posts: 3
Joined: Mon Aug 12, 2013 6:44 pm

GT860 front brake master cylinder rebuild

Post by pouchy750 » Tue Mar 12, 2019 2:04 pm

I'm just about to rebuild the front brake master cylinder from a Ducati GT860.

The new kit has two lipped brake seals like the one that is nearest the brake lever on the original arrangement. The original layout had only one lipped brake seal near the brake lever & an o ring seal at the spring end of the brake plunger. Which way round does the lipped brake seal go at the spring end of the plunger? Same as the top or the other way round?

Or have I been sent an incorrect rebuild kit & need an o ring seal at the brake plunger spring end?

Also the original plunger had two small holes drilled in the end that fed brake fluid into the groove where the bottom o ring seal was installed. The new plunger has no holes at all.

Is this an upgraded plunger arrangement, or are the holes missing?

User avatar
BevHevSteve
SITE OWNER
SITE OWNER
Posts: 2175
Joined: Wed Mar 10, 2004 8:53 pm
Location: Lafayette, California
Contact:

Re: GT860 front brake master cylinder rebuild

Post by BevHevSteve » Tue Mar 12, 2019 10:03 pm

what is the brembo part # of what you received?

Please post a photo of your master cylinder.

Please post a photo of what was removed from your mc next to the new kit?

Sounds to me like you got the wrong kit since you mention o rings as there are no orings in your original master cylinder only seals.
Image
Steve Allen (925)798-BEVL[2385] Ride'm, Don't Hide'm
Ducati/Euro Spares -> https://Store.BevelHeaven.com
Facebook > http://facebook.com/Bevel.Heaven
Twitter > http://www.Twitter.com/BevelHeaven

Post Reply

Return to “Wheel, Brake & Tyre Shop”