Grease gun to remove stuck piston - Friggin' Awesome !

[DeanR]

I used compressed air which worked well also. Just got to aim it at something soft because it will come out like a ballistic missile without warning.

Thin piece of wood placed behind the pistons prevents this 'flying across the room' scenario.
The pistons just slam into the wood.

[tbschupsky]

I used compressed air which worked well also. Just got to aim it at something soft because it will come out like a ballistic missile without warning.

[DeanR]

Compressed air is a bit less messy but glad the grease worked.

[snakedriver]

That's a great tip. I keep an old master cylinder and hose off of a CR125 hanging on the wall for freeing up stuck pistons. Just hook up the banjo bolt to the stuck caliper, fill the master cylinder with fluid, bleed it and presto, the stuck piston moves again.

The grease gun trick sounds easier though.

[Courtney]

So after hacking myself up all day yesterday trying to get a piston out of my front caliper I gave up. I had tried silicone spray in behind the piston (through the banjo hole) and two screwdrivers in the ridge of the piston to no avail. After losing enough blood to force myself to have a big rum and coke, I called it a night. Next morning went up to Canadian Tire and bought a M10 X 1.25 bolt, I put it in the banjo hole to seal that, and then teflon taped the bleeder screw. I got out the trusty grease gun, snapped it over the bleeder valve and pumped her full of grease. What a treat watching that piston just slowly rise up outta that caliper!! This was Crazy Steve's suggestion in a thread on rebuilding calipers, and I gotta tell you if I'd done this first, I wouldn't have bled all over the place. I vote Crazy Steve as guru of the day! Beers here waiting for you Steve.