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blackbird clutch master cylinder
carnut - 18/2/03 at 05:52 PM

Any1 know what master cylinder to use on an blackbird engine. Ive got the original bit fear this may not be suitable and may make the clutch too light.

Rorty - 19/2/03 at 03:28 AM

Look on the side of the original Bird master cylinder, and you'll see a number cast into it, probably 12 or 14. That's the bore diameter in milimeters.
Go to a bike breaker, and ask for a rear brake master cylinder of the same bore size, then just make a suitable bracket.

carnut - 19/2/03 at 09:01 PM

how will this change the lightness of the clutch.

Why can you use the brake master cylinder and not the clutch one.

Rorty - 20/2/03 at 12:50 AM

Carnut:

quote:

how will this change the lightness of the clutch.


I should have suggested trying an alternative size of master cylinder.
You can change the "feel" of the clutch by changing to a different diameter of master cylinder. If one isn't available of the required diameter, you can also alter the pedal ratio.
Umless you have experienced a similar set-up in someone else's car, and can copy that, you'll have to carry out a few experiments of your own until you get the right "feel" for you.


quote:

Why can you use the brake master cylinder and not the clutch one.


There's no reason why you can't use the original (or different sized) clutch master cylinder. Rear brake MCs are available in a wider range of diameters than clutch ones, are neater, and easier to mount, that's all.


[Edited on 20/2/03 by Rorty]