Help With Front Master Cylinder Size?

jeronimo
Junior Member

Posts: 52

Help With Front Master Cylinder Size? May 30, 2008 3:22:24 GMT -5

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Post by jeronimo on May 30, 2008 3:22:24 GMT -5

I'm nearing completion of my chassis and could use some advice on what size of master cylinder to use on my front brake conversion.

I have a 4 piston Brembo 5165 series Goldline caliper with two 30mm pistons and two 34mm pistons(P3034), Brembo p/n 20.5165.86, if that helps any.

I'm running a single 320mm rotor on the right fork leg. I got the caliper bracket and rotor spacer from Vanem. The rotor and caliper I got off e-bay at really good prices, both new, unused parts.

So now, I'm down to the master cylinder and the brake line from having my front brake conversion done!

Best regards to you all. Jeron

jeronimo[br][br][br]'78 SR 500E[br]'02 KLR 650

pcnsd Full Member Posts: 113	Help With Front Master Cylinder Size? May 30, 2008 21:44:30 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by pcnsd on May 30, 2008 21:44:30 GMT -5 See if this helps. It is a reprint of an article from vintagebrake.com. Covers finding that sweet spot for brake feel. PC roadstarclinic.com/content/view/89/95/

jeronimo Junior Member Posts: 52	Help With Front Master Cylinder Size? Jun 1, 2008 13:17:07 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by jeronimo on Jun 1, 2008 13:17:07 GMT -5 Thanks for your response, PC! Very helpful!
	jeronimo[br][br][br]'78 SR 500E[br]'02 KLR 650

caferacercarl Senior Member Posts: 264	Help With Front Master Cylinder Size? Jun 2, 2008 3:41:28 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by caferacercarl on Jun 2, 2008 3:41:28 GMT -5 five eigths will give good feel, any more will reduce lever travel [and feel] too much, most twin disc japanese bikes run a five eights master, rubber line is fine and better for bumpy roads. cheers.
	SR500, guaranteed to make a mechanic out of the man.

jeronimo
Junior Member

Posts: 52

Help With Front Master Cylinder Size? Jun 3, 2008 3:13:22 GMT -5

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Post by jeronimo on Jun 3, 2008 3:13:22 GMT -5

Thanks for your recommendation, Carl.

I do have a question though. Wouldn't a 5/8ths be overkill? Because I'm only running a single rotor/caliper. Or does 5/8ths work out alright with the size and # of pistons in my caliper?

Sorry if I'm being dense, had a long day @ work today!

Jeron

jeronimo[br][br][br]'78 SR 500E[br]'02 KLR 650

Help With Front Master Cylinder Size?

Post by jeronimo on May 30, 2008 3:22:24 GMT -5

Post by pcnsd on May 30, 2008 21:44:30 GMT -5

Post by jeronimo on Jun 1, 2008 13:17:07 GMT -5

Post by caferacercarl on Jun 2, 2008 3:41:28 GMT -5

Post by jeronimo on Jun 3, 2008 3:13:22 GMT -5