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single to dual discs

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Ronkom:
Years ago when I restored my Eldo, I mounted the second disc/caliper on the front wheel w/out changing the front brake master cylinder on the handlebar. I'm sure the feel would be better and the lever would require less effort with a change out to a larger master cylinder, but the brake has worked fine.
Question: I have an EV front wheel w/the extra caliper to mount on a Stone. Is it absolutely necessary to change the master cylinder, or, can I expect the same type of performance I have on the Eldo? Anybody done this?
Thanks,
Ronkom

Rich A:
I put a second disc on my Jackal (w sidecar attached), and didn't change the MC. I know other people will say that it is essential to change the MC, but I'm fine with the set-up as it is. The lever action is softer now, of course, but I can still lock up the front. My suggestion would be to try the smaller one, and change it out if you don't like the feel.

Rich A

Orange Guzzi:
Visit this web site for clarifications: http://vintagebrake.com/mastercylinder.htm

Your life may depend on it.

Rich A:
More info on MC/brake ratios:

http://www.customfighters.com/forums/showthread.php?t=56704

Disclaimer--sounds reasonable to me, but I can't vouch for accuracy.

Rich A

cruzziguzzi:
I certainly don't know beyond my experience with 4 wheeler upgrades but I think at a minimum, to cope with expected (only possible?) higher applied pressures - I'd be certain to use braided steel lines. This, based upon others telling me they have needed to "grab" harder when going from 1 -2 discs on the same MC. No science there of course, just set of the pantsiness.

Todd.

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