scootz
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| posted on 11/11/11 at 05:28 PM |
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MC Size for Clutch on BEC's???
The slave-cylinder issue on a BEC is confusing me! Should it!? 
Is there a 'typical' size of MC that people are using for BEC's???
Cheers!
It's Evolution Baby!
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mark chandler
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| posted on 11/11/11 at 05:44 PM |
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I cannot see it matters, just match the master so you get a 1 -1 ratio and set the travel by pivot on the pedal 
Just make sure the stroke is long enough, oh er.
[Edited on 11/11/11 by mark chandler]
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scootz
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| posted on 11/11/11 at 06:06 PM |
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Cheers Mark.
Unfortunately there are no markings on my slave to say what size it is.
It's Evolution Baby!
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Bare
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| posted on 11/11/11 at 06:09 PM |
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Size DOES matter !
Moto master cyls are surprisingly small, remember these are hand operated. IF you use a typ car type MC you could find that the thing is so big that
a 1/2" of pedal travel will push enough fluid volume to fully disengage the clutch and possibly even blow the slave seals. Likely not something
you were wanting to happen.
Have no idea what size you specifically need.
Research on the size of the donor Motorcycles' master cyl bore ..was... then work from there.
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Peteff
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| posted on 11/11/11 at 08:19 PM |
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Try a bike rear brake master cylinder, it should move enough fluid to do the job and they are cheap from breakers.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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scootz
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| posted on 11/11/11 at 09:22 PM |
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quote:
Originally posted by Peteff
Try a bike rear brake master cylinder, it should move enough fluid to do the job and they are cheap from breakers.
I have one in my garage that I can give a bash.
It's Evolution Baby!
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cloudy
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| posted on 11/11/11 at 09:34 PM |
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.625 was fine with a GSXR hyrdraulic clutch...
www.warnercars.com
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matt_gsxr
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| posted on 11/11/11 at 10:07 PM |
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I used a rear brake cylinder (as described above) on my zx6r clutch. I think (not 100% sure) that motorcycle rear brake cylinders are 1/2inch
diameter. The only weakness of them is that their throw is fairly short (about 15mm), but they seem to do the job and are very light and cheap.
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daviep
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| posted on 11/11/11 at 10:36 PM |
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+1 for bike rear MC - 0.625 from memory
“A truly great library contains something in it to offend everyone.”
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scootz
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| posted on 11/11/11 at 10:47 PM |
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Thanks fella's!!!
It's Evolution Baby!
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matt_gsxr
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| posted on 12/11/11 at 02:45 PM |
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bear in mind how you are going to bleed it. The orientation doesn't match that of the bike install.
If you want to buy new then http://www.racealternative.co.uk/products/view/842/BREMBO_REAR_BRAKE_MASTER_CYLINDER might be an option.
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