Brake Pad Pins - Replacement GenII & III - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 31 (permalink) Old 02-14-2016, 12:46 PM Thread Starter
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Brake Pad Pins - Replacement GenII & III

I posted this elsewhere, but copied here in case you need it.
This applies to Gen II & III only, as Gen 1 has a different brake pad pin with cotter pins........... If you have rounded out the 5mm hex in the brake pad pins when it is seized in the caliper.... I suspect one cause could be the galvanic corrosion that occurs between the stainless pin and the aluminum caliper. A manual impact driver is your friend, hopefully you don't have to go find an extractor. My recommendation is recognize early that you're starting to round it out......

One fix is to buy a new pin but they are quite expensive (~$30) and oh by the way don't break or lose the metal spring for the pads (~$27). Or, you could find a used caliper on ebay (I found one for $25). Or, you can use a different pin that costs a lot less........ the difficulty is finding a pin long enough, but I have found a Honda pin that will fit the bill (~70mm). This pin has a hex head which will take an 8mm hex socket, much more robust than the 5mm internal hex. Honda Part No. 43215-KZ4-J41 is in the top part of the photo, with the OEM Yamaha pin below for comparison. Note extra thread length, etc. but the important part is the length to capture the brake pad. You don't have to have the little O-ring if you lose one, it only serves as a guide as you insert the pin. See also the photo of both installed in an FJR front caliper.

The Honda pin costs ~$3.40, application is rear brake caliper of '08 CBR1000 and CRF450, perhaps other models. If you prefer a 5mm hex, perhaps try 45215-MAJ-G41, also 70 mm, but I have not verified this with a part in my hand.
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post #2 of 31 (permalink) Old 02-14-2016, 12:51 PM
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Awesome! Thanks for sharing!
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post #3 of 31 (permalink) Old 02-14-2016, 05:13 PM
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I have mentioned these pins a few times over the years, they should be part of your routine maintenance. Pull them out and grease the threads every now and then, don't wait until you have to replace the brake pads, it will probably be too late by then. And don't forget the similar bolts in the back caliper, they also corrode and freeze into the metal.

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post #4 of 31 (permalink) Old 03-09-2016, 01:11 PM
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Well now, I'm going to have to find out where these and include them in the next ritualistic slathering.
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post #5 of 31 (permalink) Old 03-09-2016, 03:27 PM
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I assume the front and rear calipers use the same size/length pin?
Thanks!
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post #6 of 31 (permalink) Old 03-09-2016, 07:20 PM
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No. Different nomenclature, part numbers and costs.

From http://www.yamahapartshouse.com/ (2013 FJR1300A)

Front: Pin, Pad, 3PS-25924-00-00, $27.15
Rear: Pin, Slide, 3PS-25914-00-00, $6.06

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post #7 of 31 (permalink) Old 03-09-2016, 09:24 PM
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Thanks John. So only the front caliper pins are expensive. Thanks!
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post #8 of 31 (permalink) Old 03-10-2016, 07:10 AM
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Hi RayZer,
Been a long time since I played with pins, but I do remember I didn't pay $30 per pin. Yamaha may have a part number for them but Yamaha does not make them. At the time I did a search and found several equivalents. When I change the pads I always take the pins to the bench and hit them with a wire brush wheel. That takes them to a bright finish in no time. You are right, IMO, about the galvanic corrosion. I put anti-seize on them and it usually stops that. Never had one back out either.
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post #9 of 31 (permalink) Old 03-10-2016, 11:00 AM Thread Starter
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On the rear caliper pin, I use silicone brake grease which is very sticky and made to withstand high temperatures.

Agree with greasing or anti-seize on the front caliper pins. I think the tapered seat is the part that sticks moreso than the threads. If one is stuck, best approach is to use an impact driver right away to hopefully avoid rounding out the 5 mm hex. Don't grease the exposed part of the pin, you don't want to attract dirt which could impede the free movement of the brake pads.

Ray
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post #10 of 31 (permalink) Old 12-22-2018, 07:53 AM Thread Starter
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Bumping this just for fun.
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Ray
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