Author Topic: Rear Master Cylinder Lever  (Read 677 times)

Offline blackcat

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Rear Master Cylinder Lever
« on: May 25, 2020, 03:15:05 PM »


This is a new rear master cyclinder on my Lemans, I've been trying to get all the bubbles out of the linked system but I finally realized that the lever is not fully pressing the MC piston. Adding two dimes between the piston the foot brake lever will now pump up the system, but I believe that what I need is a different lever which I do not have; as noted by MG Cycle the lever should be swapped when purchasing this master cylinder.

My question is, does that lever have an additional hole between the current one in the photo and the pivot point which the rod attaches to or is there another hole closer to the pivot point bolt to attach the current bolt? I'm thinking that I could just drill another hole if I knew where to drill.   

The way it is now I can finally pump out the air in the lines, but the brake pedal is too high. Like I'd have to slightly raise my foot to use the brake pedal.


Edit: Ok , found the part number; Harper's has one so modifying mine is not an option.   
« Last Edit: May 25, 2020, 03:27:37 PM by blackcat »
1968 Norton Fastback
1976 Lemans
1981 CX-100
1993 1000S
1997 Daytona RS
2007 Red Norge

Offline pete mcgee

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Re: Rear Master Cylinder Lever
« Reply #1 on: May 25, 2020, 04:21:45 PM »
About 25 yrs ago I made one for my lemans 3.
The brakes were very average, pedal travel was long and the lever was worn as was the contact face of the master cylinder piston where the lever contacted.
Made mine from 7075 T6, With a file and a drill. Airforce trade school skills do stay implanted it seems.
Lengthened the "beak" that contacted the back of the piston,  also lenghtened the lever end slightly, rebuilt the master cylinder and added braided brake lines.
Brakes are still as good as the old brembo twin pots and linked system are going to get.
Cheers
Pete (no not the Bungendore one)


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Offline blackcat

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Re: Rear Master Cylinder Lever
« Reply #2 on: May 25, 2020, 04:51:38 PM »
About 25 yrs ago I made one for my lemans 3.
The brakes were very average, pedal travel was long and the lever was worn as was the contact face of the master cylinder piston where the lever contacted.
Made mine from 7075 T6, With a file and a drill. Airforce trade school skills do stay implanted it seems.
Lengthened the "beak" that contacted the back of the piston,  also lenghtened the lever end slightly, rebuilt the master cylinder and added braided brake lines.
Brakes are still as good as the old brembo twin pots and linked system are going to get.
Cheers

Fortunately I had the original one from my CX which I tucked away when I installed the Agostini rearsets on the CX. In the meantime I have spent about 4 days off and on bleeding out the new brake lines and all I needed was the bracket.

Now that I think about it, I have an extra Agostini bracket so I will have to see if that will work as it is a better machined piece than the stock part.
1968 Norton Fastback
1976 Lemans
1981 CX-100
1993 1000S
1997 Daytona RS
2007 Red Norge

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