mine have been like that before and only a vice worked.. make sure the piston is sparkly as possible then lube with a bit of brake fluid then put it in a vice and use a cloth to prevent damage from the teeth on the vice and crank it up.. it will go.. other than that theres a lip inside the caliper or on the piston? doubt it though..
sometimes using a socket to push against the piston while in the vice helps..
-- Edited by element on Sunday 28th of March 2010 08:59:40 PM
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04' DT125RE 32k miles and counting / 89' DT125R 3RN1 Rebuilt + Supermoto'd. "Those who risk nothing, do nothing, achieve nothing, become nothing"