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Thread: Empi disc brakes

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    Default Empi disc brakes

    I put a Empi disc brake kit on my trike. I mounted the calipers on the top. I am have great brakes. A whole lot better than the drums. I am well satisfied with that part but I get a noise when I use the brakes a certain way. I don't know exactly how to describe it. It is not a squeak. Sometime it makes it when I have my foot on the pedal and I am almost stopped. Has anyone else had trouble with the Empi kit. I know the rotors aren't perfectly true. Any suggestions?

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    Quote Originally Posted by starrider1946 View Post
    I put a Empi disc brake kit on my trike. I mounted the calipers on the top. I am have great brakes. A whole lot better than the drums. I am well satisfied with that part but I get a noise when I use the brakes a certain way. I don't know exactly how to describe it. It is not a squeak. Sometime it makes it when I have my foot on the pedal and I am almost stopped. Has anyone else had trouble with the Empi kit. I know the rotors aren't perfectly true. Any suggestions?
    If the rotors aren't true.....The pads might have to ware/set in a little......
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    Quote Originally Posted by rhino 2 View Post
    If the rotors aren't true.....The pads might have to ware/set in a little......
    If the rotors are not true the pads will move (rocking on the high spots of the rotor)

    This can make a slight knocking sound or a swishing sound
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    Default Empi disc brakes

    I wish I could describe better what the brakes are doing. I am going to pull the wheels off tomorrow to get a good close look and see if I see anything out of the ordinary. I will post tomorrow.

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    Ya know.....I think mine might have made the same sound since it has been back together.

    Not all the time...but a couple times mine has made a chattering squeal sound almost like a high pitched gronk. Not loud or scary. Right before full stop. I do not think it has made it recently though. I just thought it was that I mixed up the used brake pads after it being apart so long and it has worn in now.

    Maybe....the stamped empi caliper mounts are not perfectly parallel with the rotor. Sorta twisted an ever so small amount. And the pads are not perfectly flat on the rotors....yet, they will wear in.

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    Ok guys I can't give a solution, but can add to the confusion.....question I have is........could the mounting angle of the caliper have a bearing on your problem? Kinda like the tool bit on a lathe being over or under center? or rake angle of the tool bit causing chatter? the caliper twisting forward or rearward or sideways during the application, then loses the grip from a movement of the disc or the caliper, the cycle repeating itself.

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    If the brakes work well and there are no unusual wear patterns, and everything is tight, and there is no indication of metal to metal wear anywhere. Then just drive it. Or is it a noise that turns peoples heads when you pull up. If it is then sell it to a harley rider they love it when you look at them.

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    Default Empi disc brakes

    Fixing to go pull the wheels and take a look. They say to center the calipers on the rotor. If the rotor isn't perfectly true how do you center the caliper. Also how could you tell if the rotor is twisted. I will take a look and post later. Thanks for the comments.

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    Default empi disc brakes

    Well I pulled the left wheel off this morning. I put my indicator on the rotor. I have .009 run out. Actually less than I thought. I measured from the the caliper to the rotor on the front of the caliper and the rear of the caliper on the outside part. It is within .010 of being the same so I would say it is square as I can get it. The center of the caliper looks to me like it centers to the center of the rotor. I can't really tell anything about any kind of wear pattern. The pattern on the rotor looks about the same on the inside and outside. I don't really see anything. I cleaned it real good with brake cleaner. I will probably check the other side tomorrow.

    Oh! Sometimes it is loud enough to turn peoples head but I don't want to sell it. lol I may take it to a brake shop here in town and let them listen to it and see if they can tell me anything. They are real nice to deal with. They made some new springs for my rat rod.

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    Measure your rotors for thickness in 6 equal spots, IMO .009 is a lot of runout if the inside hat area of the rotor and the face of the bearing are clean of debris

    I like to see .001-.003 run out, any more and I replace rotors, or clean the mating surfaces and re in dex them and get a new reading JMO
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