Get an MT5. Swap the calliper out. See if it works. If it’s still funky put the calliper back and swap the leaver out. Least that way you’ll know which bit is buggered.
@Howard started
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Get an MT5. Swap the calliper out. See if it works. If it’s still funky put the calliper back and swap the leaver out. Least that way you’ll know which bit is buggered.