Stingraynut

I've bought a new master cylinder for my 1988 and want to fit a brake bias spring.

Following the instructions from Doug Rippie Motorsports who supplied the spring via Ecklers, I have undone the front nut and remove the light spring there - but I can't budge the combination piston. Here's a picture looking down into the barrel at the top of the piston



Looks like there is some kind of brass clip holding it in place? I'd appreciate any advice on removing the piston.

I had a brake bias spring fitted to the old MC 3 years ago and I could never feel any difference, I'm wondering if the shop had so much trouble trying to remove the piston that they never bothered to fit it? So this time I want to fit it myself and be sure it IS there!!

rodj

Rob ,email sent

Midnight 85

I used a curved tip dental pick to get mine out, they are stuck in there pretty tight but if you hook the pick inside the hole of the end piece it will come out. There is no clip holding it in. On my '85 there wasn't much difference in brake action under normal driving but when you really jump on the brakes it shows a BIG improvement. The real fun comes when you are putting the snap ring back in.

Slalom4me

Has the electrical switch been removed from the center port (between
the ports for the front and rear circuits)? IIRC, this has a probe that
extends down into a relief cut/cast in the piston circumference.

Would LOW pressure compressed air introduced at the rear port help
ease the piston out? Say 5-15 psi? Wear safety glasses and aim the
bore at something capable of catching the piston gently.

(BTW - nice macro photo.)

.

Aardwolf

I used a wine cork screw. Pulled right out! It was on a throw away jack knife I had hanging around in the tool box.