Lucas2Bosch Posted October 30, 2008 Share Posted October 30, 2008 Does anyone know the maxamum bore size of the Magura 20mm front master cylinder found on a '95 R1100? Link to comment
lsouth3 Posted October 30, 2008 Share Posted October 30, 2008 Dave I have just replaced the MC on my 94.(ouch) It was the same MC that you have. Mine was working great but the rear cup(u-ring) was leaking. I found a company that would make replacement u-rings for me. ($24 minimum) I ordered 6 of the cups and they worked fine but the pitting in the MC caused them to fail. I didn't think of honing the pits out and then having a slightly larger cup made. That is an option. Another, which I did was sending the old MC to a firm in CA. and had it bored and sleeved. It looks great but I haven't tried it yet. Lee Link to comment
Lucas2Bosch Posted October 30, 2008 Author Share Posted October 30, 2008 .... I didn't think of honing the pits out and then having a slightly larger cup made.... As long as the honed bore is in spec, you/I shouldn't need a larger seal (don't think I would even want a larger seal without a larger piston). The main thing is, I don't want to spend the money for a rebuild kit, and then not be able to use it because my bore is out of spec. Link to comment
lsouth3 Posted October 30, 2008 Share Posted October 30, 2008 I understand what you're saying. If you decide to have yours sleeved it cost me around $80 shipped and it looks really good. I've had really good luck with my inquiries to the mechanic at North Dallas BMW Triumph in Plano. Link to comment
Lucas2Bosch Posted October 31, 2008 Author Share Posted October 31, 2008 $80, Brass or SS? I haven't been by to see Elvis at NDBMW in a while. I just might head that way this week end. Link to comment
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