brakes rattle
- wiredgeorge
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wiredgeorge Motorcycle Carburetors
Mico TX
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- Patton
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If it's the pads, the copper permatex worked for me to prevent squealing -- maybe it would also stop them from rattling.
1973 Z1
KZ900 LTD
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- apeman
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Another idea: My brakes were rattling a lot for no apparent reason, except when I applied the brake (when they would stop rattling). The problem turned out to be the start of wheel bearing failure -- just a little side play in the wheel rotation. The rattling disappeared after I replaced the wheel bearings.
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Petaluma and Truckee, CA -- member since Jan. 23, 2003;
PREVIOUS KZs: 1980 KZ750H with 108,000 miles; 1980 KZ750E with 28,000 miles; and KZ750H street/cafe project, all sold a few years back.
This is what I do for fun, not for work. It is art, with a little engineering thrown in.
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- KaZooCruiser
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The front brakes on my KZ1000E1 ST rattle a LOT when going over bumpy roads.
I don't know that much about that bike, what year, double piston, or what-have you. I couldn't find it in the model history, but maybe this picture will help.
representative brake schematic?
As Patton alluded to, there are two caliper carrier bolts (#2 in the picture) that are isolated by rubber o-rings (#12 x 4)that keep the caliper itself from moving around excessively inside the bracket that secures them to the fork. There is a possiblilty that one or more of those o-rings have broken and have gone away, especially where dry conditions and ozone have attacked them. Applying the brakes would pull the caliper forward against the bracket, removing the play. It might be time to replace the bolts if this has occurred, becuase if there is any divoting in the bolts, the caliper won't slide on them properly as the pads wear.
Post edited by: KaZooCruiser, at: 2007/03/07 20:19
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- wiredgeorge
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wiredgeorge Motorcycle Carburetors
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- KaZooCruiser
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. . . There are orings that go UNDER the rubber dust covers that go over the bolts that the pads slide out on. I don't think I used any orings (there were none there to begin with). . .I will try sticking some orings over the bolts and see if this helps the rattle. I do suspect it will... .
The o-rings go inside the mounting bracket. I couldn't see a number for it. It is the part that secures the caliper to the fork. There is an area inside of the bracket that is machined to receive the o-ring, and then the bolt compresses it against the housing when it is installed.
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- wireman
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- BSKZ650
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77 kz650, owned for over 25 years
77 ltd1000, current rider
76 kz900, just waiting
73 z1,, gonna restore this one
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- wiredgeorge
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wiredgeorge Motorcycle Carburetors
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- wireman
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- wiredgeorge
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wiredgeorge Motorcycle Carburetors
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- KaZooCruiser
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If the bike uses a full floating caliper, it means it is free to slide back and forth to compensate for wear on both pads. To allow for the back and forth motion, there are two bolts, which run loosely through a securing bracket, anchored to the fork. The bracket remains stationary, while the caliper is free to move back and forth. To isolate the bracket from the bolts, there are o-rings installed inside of the bracket, which isolate the bolts from making metal contact with the bracket itself. The o-rings allow the bolts to move within the bracket without contacting it. They are located about 1/4 inch inside both edges of the bolt cylinders on the bracket. Every time pads are replaced, and especially anytime pads are replaced due to excessive wear to one pad only, the caliper pass-through bolts should be removed and both them and the o-rings checked for binding and deterioration. It is an easily overlooked area. But with road splash, heat, ozone, and time, it is an area that care and caliper grease will protect. Be safe out there. . .
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