Disc Brake "Upgrade" Boxermetal.com

bradley martin · 2022-01-20T20:47:56Z

Hey group. Someone, from one of my now many BMW airhead sources, mentioned an upgrade to the wonderful caliper/disc arrangement we of 74-80 vintage airheads are blessed with. R90X BIG BRAKE KIT – Boxer Metal Boxermetal.com Has this kit. Replaces stock rotor with a floating 320mm from a Ducati 1098. Replaces the caliper with a 4 pot off a BMW S1000R. Includes this insert which attaches to the current caliper pivot point but provides mounting points for the radial caliper. Looks like some removal of some of the casting might be required. (site sez "basic tools only required", so hacksaw maybe?) I've done everything suggested on this site and others to get the most out of the original design. I've taken it to a BMW guy who has been twisting wrenches on these things for 40 years. He said "Yup" that's about all you are going to get. I find the braking on my 78' R80/7 almost silly compared with the other bikes in my garage. so.... Before I shell out hundreds of $$$ and carve up my fork leg.... Anyone done this upgrade? Was it a major improvement? Is it a 3 finger braker now? (As opposed to four finger max pull and boot heels dug into the tarmac just to assist? still only providing a modest deceleration experience....) Any input would be great.

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Joshua Rudlong

(@rudlojl0)

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I almost tried the mod early on, so am curious on the process and results. thanks for the write-up, looking forward to the the track results, and your final thoughts. I got my ate system working as good as possible, but sometimes want more.
josh

Posted : 03/13/2022 06:48

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