Aftermarket clutch master cylinder - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 17 (permalink) Old 04-30-2014, 11:41 AM Thread Starter
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Aftermarket clutch master cylinder

My current clutch is not engaging due to no piston set, push rod or bushing inside, but I also saw a tiny leak coming out. So instead of buying the piston set, push rod and bushing, I was thinking about buying this after market universal clutch master cylinder off ebay, but I am hesitant.

Have any of you guys bought this item before? Can't seem to find any reviews.

If I do buy that set, would my OEM oil cup fit on the after market front brake? (The item only comes with the cup for the clutch fluid, no oil cup for the front brake).


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post #2 of 17 (permalink) Old 04-30-2014, 11:56 AM Thread Starter
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post #3 of 17 (permalink) Old 04-30-2014, 11:57 AM Thread Starter
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post #4 of 17 (permalink) Old 04-30-2014, 11:59 AM
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Stay clear from these chinese crap!

Just bite the bullet and go for it.....you won't regret it

http://www.wrs.sm/en/frizioni-pompe-...110a26350.html


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post #5 of 17 (permalink) Old 04-30-2014, 12:07 PM Thread Starter
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Aftermarket clutch master cylinder

That brembo part in that link is exactly what I need. Its nice but expensive and not what I want since I'm not racing, just track days. It's that stupid piston set, push rod and bushing that won't engage the clutch, so every time I squeeze the lever I get no reaction. Then comes the drop it two of the fluid that I saw. So I really am not sure if I should buy the set, or what's in this picture below. Click image for larger version

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Last edited by Ram51; 04-30-2014 at 12:13 PM.
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post #6 of 17 (permalink) Old 04-30-2014, 01:17 PM
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I would personally run the Brembo as that is what I have on mine, but there is nothing wrong with picking up a slightly used OEM master cylinder on eBay or something if it makes more financial sense to you. Confirm you don't have any leaks at the slave cylinder as well.
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post #7 of 17 (permalink) Old 04-30-2014, 01:26 PM Thread Starter
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Yeah I guess I'll have to bleed the clutch fluid and dismantle the clutch master cylinder to further inspect, I noticed some fluid right under neath the cup.


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post #8 of 17 (permalink) Old 04-30-2014, 02:08 PM
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Might be a split in the hose under the cup or a crack in the cup itself.
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post #9 of 17 (permalink) Old 04-30-2014, 03:00 PM Thread Starter
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Might be a split in the hose under the cup or a crack in the cup itself.

If it's a split in the hose, would I have to replace the hose as well? Any cool tricks to determine if it's the hose? (Kind of like using soap and water to find a punctured hole in any tire)


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post #10 of 17 (permalink) Old 04-30-2014, 03:06 PM
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The hose under the cup isn't very heavy duty, so the split would be very obvious. No real tricks to it. Might be worth replacing because it lost elasticity and doesn't seal. Sometimes this stuff just gets old and needs replacing. The cup and hose for the master cylinder are cheap so it wouldn't be a stretch to replace them.
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