Hard clutch pedal

[King- cobra]

I have a Kirkham that I replaced the Throw out bearing, rebuilt the clutch disc and had the flywheel and pressure place resurfaced. This was done because of a leaking bearing. I installed a stock clutch fork with a 7/8 slave cylinder and a stock 070 master for the clutch. I bled everything as it should and the clutch works as it should but is very stiff. I spoke with David at Kirkham and and it makes no sense as that is what he uses in the cars and the clutch works much easier. Anyone run into this problem?

Thanks in advance for the help.

[scootter]

I had the same issue with mine. Most people couldn't even completely depress the clutch pedal.
I have a Superformance with a 514 and a TKO. Mine was stiffer then heck!! I ended up realigning the slave cylinder, making a better push rod with a smooth ball on the end, taking my dremel tool and smoothing out the fork and putting white grease on everything. Made a huge difference.
Scott

[Tony Radford]

I've forgotten the correlation between master and slave bores. If I recall, I increased my master from a 7/8" to a 1" to get more travel for a long through Ram clutch and it became almost unusable (took both feet to depress). Went to a longer throw 7/8" and the problem was solved. Do a search on clutch-related threads and I'm sure the info is there.

[blykins]

The smaller the master, the easier on your leg, but the more travel it takes.

I'm usually a 3/4" master cylinder kinda guy.

[Petro572]

I had a similar issue and fixed it with $8 worth of scrap metal. Get a 6 inch piece of 1 inch angle iron. drill 2 holes to extend the clutch fork out 1.5 to 2 inches. I used a 3 inch wide piece of 1/4 scap metal to reposition the slave cylinder to align with the clutch fork. The extra leverage reduced clutch pedal effort by 50%. They sell kits for around $90 that do the same thing but are primarily for clutch cables. I figured the same philosophy would apply to hydraulics to get better leverage. Took me about 30 minutes.

I'll take some photos tonight.

[Rick Parker]

Were any of the springs on the pressure plate changed or added to? Stronger Pressure Plate requires more effort to make it release.