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Post by mxmatt on Apr 10, 2014 10:08:34 GMT -6
Ya what they said. I'm going to go with you definitely have a metal on metal problem. Could be the caliper is misaligned or the bolt holing the caliper to the fork tube is too long and rubbing on your disc. Check the disk for scaring and search the surface areas on the pads and caliper that align with any scaring you may find.
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Post by DrRocco on Apr 10, 2014 18:26:24 GMT -6
Well, as it normally happens, I made a solid effort to document the condition of the entire brake system to show you guys it looked pretty good. Once I put it all back together again...It's working fine. No issues. I'm gonna take it to class tomorrow, about 25 miles/60 min stop and go, round trip. Hopefully, it'll remain quiet and functional. Anyway, here's the video I made for you guys...
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Post by LUKE on Apr 10, 2014 21:18:39 GMT -6
do this: spin the wheel then brake then release, try to spin the wheel with you hands,if it has resistance then maybe the pistons on the brake assembly were stock up or has some rust on it.,,,take the brake assembly apart clean the dust or rust remnants.there might be some rust in between the pistons and the brake block assembly. you may need to replace the brake fluid and do the bleeding.. good luck!
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Post by cyborg on Apr 10, 2014 22:06:10 GMT -6
thanks Doc great video!!!!!,,,,i think it was just a slight misalignment,,,no rubbing now on the second video nice and silent,,,good job my man!!!!!
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Post by DrRocco on Apr 11, 2014 8:49:53 GMT -6
Made it through probably 20 stops nice and quiet. Once I got on campus, I hit that first stop sign and the grinding is back. It wasn't a gradual onset. It was fine... Then it wasn't.
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Post by kz1000st on Apr 11, 2014 10:24:08 GMT -6
Now you have to ask yourself,"What was different about the stop on Campus?" Was there a speed bump before the stop, was there some kind of strange turn, did you have to jump a curb. Something is knocking on something or again, have somebody spin the wheel for you and hit the brake slowly. You have to isolate the noise. Also, run backwards with the scooter and hit the front brake, then go forward and see if it's changed.
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Post by jvino on Apr 11, 2014 10:27:21 GMT -6
Looks like you found the problem. I think if you ride it for a while it will stop but you might want to send the rotor back to who you bought it from and try a new one. Good thinking with the marker. Keep us posted looks like a great scooter.
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Post by cyborg on Apr 11, 2014 11:52:09 GMT -6
one thing not touched on here,,,is the disk tight on the hub? i would also check torque on the axel to be sure it's tight,,,and one more thing,,,make sure once you check the axel,,check axial or lateral play,,,one of the spacers may be a few thousand out and the wheel is moving side to side ever so slightly
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Post by LUKE on Apr 11, 2014 12:46:25 GMT -6
even if the brake pads has only 20% thickness,and even if the caliper is misaligned you won't hear any metal to metal grinding sound, and if indeed there is a metal to metal grinding, you will see an obvious fresh scar on the brake rotor. that's for sure!!!
the permanent marker theory is crap, yes of course if you put permanent marker it will surely fade because the brake pad is running through it. it doesnt matter if the gripping of the caliper is not even. bottomline, if you still see pads your'e still good.,, i mean whatelse can touch the rotor except the pads...
check the pads, there might be some metal shavings that squeesed in between rotors and pads... good luck!!!
in dealing with these kinds of stuff, common sense is very important.
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Post by davec on Apr 11, 2014 13:21:58 GMT -6
even if the brake pads has only 20% thickness,and even if the caliper is misaligned you won't hear any metal to metal grinding sound, and if indeed there is a metal to metal grinding, you will see an obvious fresh scar on the brake rotor. that's for sure!!! the permanent marker theory is crap, yes of course if you put permanent marker it will surely fade because the brake pad is running through it. it doesnt matter if the gripping of the caliper is not even. bottomline, if you still see pads your'e still good.,, i mean whatelse can touch the rotor except the pads... check the pads, there might be some metal shavings that squeesed in between rotors and pads... good luck!!! in dealing with these kinds of stuff, common sense is very important. Luke For once, I think I gotta agree with ya (to a point) I agree that if there is pad left, you 'should' be ok But, 'something' is rubbing in there, and most likely a metal shard stuck in the pad. And, this time, I could not detect any Asian accent. (or even bashing-good job on ya) And, of course, when all else fails, bring out the 'common sense'. |
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Post by DrRocco on Apr 11, 2014 16:08:47 GMT -6
I give up. It was fine the whole ride home. I even hit the brakes to check before even pulling out of the parking spot all the way. Everything is tight. No lateral play. Axle still torqued. Forward stop, reverse stop... All good. No potholes or speed bumps or crazy turns.
I guess I'll just keep an eye on it and try to figure out some sort of pattern or series of events that lead to the sound coming and going.
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Post by kz1000st on Apr 11, 2014 17:45:48 GMT -6
Did you check the Speedo cable? I'M guessing at this point it's something else.
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Post by DrRocco on Apr 11, 2014 18:17:01 GMT -6
Yeah kz. I checked it. It's all clear. No binding, kinks, cuts, abrasions... I have no idea.
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Post by cyborg on Apr 11, 2014 22:19:00 GMT -6
Well Doc the only thing left on the list is the anti chatter spring thats deep in the pad recess is rubbing on the edge of the disk ,,,other than that ride that thing will ya
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Post by DrRocco on Apr 11, 2014 22:49:23 GMT -6
Amen brother. The wife is off work tomorrow and we only have 2/4 kids this weekend, so I'm hoping to abandon her here with the two boys for a good portion of the morning and run a full tank of gas through the scoot. "I made you guys a stack of pancakes..." "HEY LOOK!! IT'S ELVIS!!" Then, WHOOSH, I'm gone.
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? And again at 2033mi. 
