craig_007
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| posted on 27/8/07 at 07:02 PM |
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clutch pedal mega hard
I'm just wondering if there is anything I could do to make my clutch a little more workable,at the minute there is very little travel(the clutch
is either on or off)
It's a hydraulic set up ??
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zilspeed
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| posted on 27/8/07 at 07:33 PM |
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You probably have the wrong bore size on one of your cylinders.
What is your current setup ?
I'm guessing car master cylinder and bike slave cylinder.
Bike master cylinder operated by a cable from the car clutch pedal onto the lever is a good setup. It will be mega light, but you can balance it with
a spring to get a bit of resistance for foot operation.
[Edited on 27/8/07 by zilspeed]
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craig_007
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| posted on 27/8/07 at 07:41 PM |
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Thanks for the reply,I have only just bought the car so I'm unsure what it is,It appears to be a master cylinder at the back of a home made
clutch pedal and a braided hose leaving the master cylinder going to the engine !!
Sorry for the poor description,thats the only way I have of describing it !!
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zilspeed
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| posted on 27/8/07 at 08:01 PM |
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Pics of the bits would help here in identifying the potential source of the problem. 
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craig_007
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| posted on 27/8/07 at 08:19 PM |
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I'll nip out to the garage and take a few
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craig_007
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| posted on 27/8/07 at 08:54 PM |
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I have now stuck a few pictures of the setup on my photo archive,I hope this helps a little
[Edited on 27/8/07 by craig_007]
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RazMan
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| posted on 27/8/07 at 09:21 PM |
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Looks like you have a car master cylinder with bike slave. This not usually a problem but I reckon your pedal ratio needs changing. The m/c pushrod is
far too high, making the pedal ratio hard work. You will need to either move the m/c pivot down (keeping the right angle though) or moving the pedal
pivot up, which will also shorten the pedal.
Alternatively you could try another m/c with a smaller bore size.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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craig_007
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| posted on 27/8/07 at 09:32 PM |
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Cheers Raz,
I had a look at the M/S and I'm sure it has 3/4 stamped on it,what size of M/S should I try as the clutch is pretty poor !!
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RazMan
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| posted on 27/8/07 at 09:38 PM |
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Try and find a 5/8" (0.625" ) or smaller and that will certainly make things easier. It should make the pedal travel longer and take less
foot effort.
[Edited on 27-8-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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stevec
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| posted on 27/8/07 at 10:00 PM |
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U2U Sent, Thats my previous engine.
Steve.
[Edited on 27/8/07 by stevec]
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matt_gsxr
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| posted on 28/8/07 at 09:37 PM |
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Another option is to use the master cylinder from the rear brake of a motorcycle.
These get you down to smaller cylinder sizes and so help (i.e. less on/off, and more pedal stroke). The problem is with mounting them, as they
don't have the "standard" mounting of the car ones.
It is difficult to get below 0.625 inch for car master cylinders, which may not change this enough for you. It is an easy and relatively cheap swap
to have a try though. You can obviously combine this with tweaking the pivot points.
Matt
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