Clutch Master Cylinder

[Baja Explorer]

Is anybody using a CNC master cylinder (or other brand) to actuate the stock clutch hydraulic slave on a motorcycle engine? The ZX14 motor I am using has a hydraulic clutch actuator and I am concerned that I won't get much throw on a standard master cylinder when hooked up to the motorcycle clutch. What are you guys using, and what size?

I could rig up the stock motorcycle master cylinder, but I don't think it would be the cleanest setup.

Thanks!

[AtvNut]

if you have access to the original motorcycle one I would check its output then use that as a guideline for a replacement foot pedal type master

[KWiKSand]

Hi Baja Explorer

There was a little info on people using a master cylinder for the clutch in this thread

http://www.minibuggy.net/viewtopic.php?t=310

[K-fab]

Call Jay Largo at [url=http://www.desertdogoffroad.com:lazeb5mk]Desert Dog Off Road[/url:lazeb5mk] and ask him what size bore he's using.

He runs a Jamar pedal setup in his cars and operates a Busa's clutch with the pedal setup.

[ProtoDie]

I am using a 5/8 bore master cylinder with 1 1/2 stroke for my clutch. This is driving the slave cylinder, which is then hooked up to the stock bike clutch cable (GSXR 600)

My pedal is adjustable, but I have it set up with about 2 1/2 -3" of throw and the pedal is easy to engage.

My brother changed his up to a 7/8 bore master cylinder (maybe 1", not sure) and this shortened up the pedal stroke to maybe 1 1/2" and the pedal is alot stiffer to engage.

[ProtoDie]

I also was not happy on how quickly the pedal returned. I added a assist spring to the slave cylinder to make sure it returned all the way, worked out nice.
Look to the frame just above the nerf bar plate

[ProtoDie]

I started with this pedal set from desert carts http://www.desertkarts.com/item80911.ctlg

I ended up just using the cylinders and 1 of the pedals to make my own pedal setup. I wanted a wide brake pedal to be able to brake with either foot, and my steering shaft is right in the center.

[Glamisman]

I am using the entry level Jamar clutch / brake master cylinder assembly and the clutch master has more than enough volume, as a matter of fact too much, I broke the slave cylinder case when my foot slipped and the clutch pedal made full travel, you will have to limit the master cylinder pedal travel.

After 2 years of using the Jamar pedal assembly I am ready to change to another brand, maybe CNC. I say this for the following reasons. First, there is so much vibration in the chassis that the fluid vibrates out of the master cylinder, maybe a different type cover will solve that problem. Second the pivot/pushrod retaining bolt is exactly that, a bolt and I have had it vibrate loose twice, even using blue thread locker. CNC uses a collered pin with a cotter pin to retain the pin, maybe I will just drill the pedal assmblies and use the CNC pins. JUst my 2 cents worth.