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Chinese master cylinders any good?

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I just tried to rebuild my rear brake master cylinder on my 2013 crf450 and it turns out the master cylinder is shot I guess because when I put the piston back in the cylinder and push it down to get the circlip on, the piston gets stuck. I'm installing it correctly with the spring and everything but once it gets pushed more than about 1/2in into the cylinder, it sticks. There was the slightest burr on the piston but apparently that's all it took. Are these Chinese master cylinders decent?

http://m.ebay.com/itm/321659035852?_trksid=p2385738.m2548.l4275&_mwBanner=1

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There was a thread a little bit ago with the same question as you. after many people told him not to he still went with it and they turned out to be crap.

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IMG_5871.thumb.JPG.9e55ecb22c72fa6c58cbaf8d330a5cd0.JPG

Just to be certain it's not user error. This is the correct way it should all be assembled right?

The piston moves freely until it's pushed fully into the cylinder. Once the flat part that contacts the push rod gets into the cylinder, the piston basically gets stuck, or rather extremely tight.

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