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Old 12-11-2011, 08:41 AM   #1 (permalink)
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Thermodyne is reading this now saying WTF is this? Thermodyne is reading this now saying WTF is this?
FXR rear brakes

What's the difference in the rear breaks on early to late FXR's? Is it just the way that the caliper mounts up to the bracket?
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Old 12-11-2011, 05:11 PM   #2 (permalink)
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What's the difference in the rear breaks on early to late FXR's? Is it just the way that the caliper mounts up to the bracket?
I have no idea.....I replaced my perfectly working (black) rear brake for a chrome caliper and bracket. It came off a 1990 FXRS. Are you trying to mix and match parts?
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Old 12-11-2011, 07:08 PM   #3 (permalink)
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I have no idea.....I replaced my perfectly working (black) rear brake for a chrome caliper and bracket. It came off a 1990 FXRS. Are you trying to mix and match parts?
I have a 84 with worn pin holes, and 84 brackets are hard to come by as well as costly. So I get a 94, and I'm looking at it and it looks like the MC upgraded the caliper pins. And it looks like the 94 bracket-caliper-pads would fit the 84.
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Old 12-11-2011, 11:04 PM   #4 (permalink)
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FXR Rear Brake Upgrade

My FXR is an 87 FXRC. My original caliper had some wear on it where parts were rubbing. It was still functional but I knew it would be a question of how long? I purchased a Grimeca 1050/55 41mm dual piston caliper from Storz Performance. I had to fabricate my own caliper bracket out of aluminum and that was a bit of a hassle. I am a retired tool and diemaker so this is no problem for me. I used the original bracket as my model. The Grimeca stops like GangBusters! You can lock your rear wheel if you get on it too hard!
An alternative solution is the FXR4 rear brake. The FXR4's were the last FXR's made by H-D in 2000 and they came stock with the new four piston calipers front and rear. Whether or not they used the same rear caliper as the Dynas or FLT's I can't say. However this was one of the best rear calipers H-D ever built so if you're planning a rear brake upgrade you might want to check into this. One problem though is that you will have to weld a stabilizer bracket to the inside of the right swingarm fork. And it has to be straight so you can adjust your belt tension. This is an easier solution then fabricating a whole new caliper bracket.

Last edited by kdkerr2; 12-11-2011 at 11:13 PM.
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Old 12-13-2011, 08:35 AM   #5 (permalink)
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The difference is the caliper mount. The MC switched to Kelsy-Hayes calipers and they used a different pin arrangement. I'll have to see it the hose and master cylinder from the early style will work with the K-H caliper.
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Old 11-05-2012, 08:28 AM   #6 (permalink)
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I just had to replace the rear breakpads on my 2012 FXDC with 6k miles. Not sure why they went so fast but the new ones went on fine. Now in can hear them scrapping when the engine is off and i am pushing it back and it does not roll freely now. Is there something wrong with the caliper not releasing?
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Old 11-05-2012, 09:01 AM   #7 (permalink)
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I just had to replace the rear breakpads on my 2012 FXDC with 6k miles. Not sure why they went so fast but the new ones went on fine. Now in can hear them scrapping when the engine is off and i am pushing it back and it does not roll freely now. Is there something wrong with the caliper not releasing?
Ya if the brake is dragging, then you have an issue. This is actually the FXR section of the forum, so knowledge on a late model Dyna will be limited.

The fact that the pads wore out so fast says you have an issue with the brake dragging that has been there for a while. Isn't it still under warrantee?

Some things to check if it's NOT anti-lock equipped:

NOT is very important here.

Apply and release the brake and then roll the scooter a little. Open the bleeder and see if there is any residual pressure. As in fluid spurts out or the scooter suddenly rolls easy. If so, check the hose, master cln, or pedal adjustment.

Check that the caliper slides easily on the mounts.

Check that the pads slide easily in the bracket.

Apply and release the brake with the caliper loose. If problem repeats look for the binding part.

If you have anti-lock brakes, then you'll need to use the diagnostic ladder in the service manual. Anti-lock can kill you, so service with care.
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Old 11-06-2012, 06:39 AM   #8 (permalink)
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The difference is the caliper mount. The MC switched to Kelsy-Hayes calipers and they used a different pin arrangement. I'll have to see it the hose and master cylinder from the early style will work with the K-H caliper.
They switched to the Kelsey-Hayes calipers along with a different master cylinder in mid '87. I have the new K-H caliper with the old style master cylinder and it works fine.
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