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Motorcycle Forum / General / Yamaha / July 2007New Brake pads, now it squeals.
Had new rear pads put on my YZF600r. Now it makes a squeal when you are almost to a stop. If you push the brake hard it doesn't do it, but with light braking it does. Any ideas why this does this and how to remedy it? Thanks. >Had new rear pads put on my YZF600r. Now it makes a squeal when you are >almost to >a stop. If you push the brake hard it doesn't do it, but with light braking >it does. >Any ideas why this does this and how to remedy it? Thanks. Your new pads have probably glazed from lightly contacting the disks as they turn. There is a little known ratio of sliding friction to breakaway friction that riders encounter as they come to a full stop. Sliding friction is 1/3rd of breakaway friction and, when a rider comes to a complete stop with a handful of front brake, the retarding force on the front disks suddenly triples as the disk stops turning. That's when the motorcycle transfers a lot of weight to the front wheel and does a stoppie. By the same token, when the rear wheel comes to a full stop with the rider's hind leg pushing down hard on the brake pedal, there's a lot of retarding force on the rear disk and the rear brake may lock up slightly. Sometimes you hear a groaning sound when you use the rear brake to stop. The groaning comes from the disk overcoming breakaway friction, the pads slide, then grab, then slide, etc. If you pop you pads out out and examine them, the surface of an aftermarket semi-metallic brake pad will look shiny. To stop semi-metallic pads from squealing just lay a piece of sandpaper on a sheet of glass and work the pad in a figure 8 motion until the glaze is gone. You can also clean the dark slick surface off the disk using some brake cleaner and maybe a Scotch Brite pad. If you jack the rear wheel off the ground and hold the pad against the disk while you rotate the wheel, you won't get any strange swirly patterns on the disk. Organic original equipment pads may look shiny all the time, you can knock any glazing off the surface by hard application of the rear brake. Don't go out and jam on the rear brakes an lock them up and fall down just because I said that. >>Had new rear pads put on my YZF600r. Now it makes a squeal when you are >>almost to [quoted text clipped - 45 lines] > Don't go out and jam on the rear brakes an lock them up and fall down just > because I said that. Thanks for the reply. I'll pull them of and look at them today. That high pitched squealing noise is driving me nuts. >Had new rear pads put on my YZF600r. Now it makes a squeal when you are >almost to >a stop. If you push the brake hard it doesn't do it, but with light braking >it does. >Any ideas why this does this and how to remedy it? Thanks. sounds like the new pad hasn't seated. go out and do some hard riding and braking to get some even wear. > Had new rear pads put on my YZF600r. Now it makes a squeal when you are > almost to > a stop. If you push the brake hard it doesn't do it, but with light > braking it does. > Any ideas why this does this and how to remedy it? Thanks. You could soak the brake pads in silicone oil overnight Then they won't squeal >> Had new rear pads put on my YZF600r. Now it makes a squeal when you >> are almost to [quoted text clipped - 4 lines] > You could soak the brake pads in silicone oil overnight > Then they won't squeal And when some novice reads that, takes your advice, and dies in an accident because of it, will you will still think it funny? >>> Had new rear pads put on my YZF600r. Now it makes a squeal when you are >>> almost to [quoted text clipped - 7 lines] > And when some novice reads that, takes your advice, and dies in an > accident because of it, will you will still think it funny? It won't be an accident it will be a stupid 99.99999999999% of all crashes are stupids. "sdz;flkzxc.nm,v" wrote... > >> You could soak the brake pads in silicone oil overnight > >> Then they won't squeal [quoted text clipped - 3 lines] > It won't be an accident it will be a stupid > 99.99999999999% of all crashes are stupids. I take it that you crash a lot, then? -- Dave H. (The engineer formerly known as Homeless) "Rules are for the obedience of fools, and the guidance of wise men" - Douglas Bader > "sdz;flkzxc.nm,v" wrote... > [quoted text clipped - 7 lines] > > I take it that you crash a lot, then? ME? = 31 years of riding and taught at 2 motorcycle safety schools 17 motorcycles so far - no crashes Have ridden highways in 4 inches of fresh wet snow, torrential rains, winds to 65 mph, 1 hurricane, dessert heat, cold to minus 10 F - and high speeds when it was safe [150 mph] ;) now go soak your brake pads in silicone oil :))))))))))) >> "sdz;flkzxc.nm,v" wrote... >> [quoted text clipped - 10 lines] > ME? = 31 years of riding and taught at 2 motorcycle safety schools 17 > motorcycles so far - no crashes Then you should know better than to post such idiotic and dangerous rubbish. >> "sdz;flkzxc.nm,v" wrote... >> [quoted text clipped - 14 lines] >when it was safe [150 mph] ;) >now go soak your brake pads in silicone oil :))))))))))) wow, never had a bullshit detector implode before! if you actually ride, it's a passport 50cc scooter and you're BAD, baby! go soak your head in a clue bucket. >>> "sdz;flkzxc.nm,v" wrote... >>> [quoted text clipped - 20 lines] > you're BAD, baby! > go soak your head in a clue bucket. Scooters are 49c.c.'s now go soak your sqeeky brake pads in silicone oil >>>> "sdz;flkzxc.nm,v" wrote... >>>> [quoted text clipped - 23 lines] >Scooters are 49c.c.'s >now go soak your sqeeky brake pads in silicone oil don;t know much do you? maybe in your little state but it the ral world, they are anywhere from 45cc to 441cc. sumbass. >> "sdz;flkzxc.nm,v" wrote... >> [quoted text clipped - 14 lines] > speeds when it was safe [150 mph] ;) > now go soak your brake pads in silicone oil :))))))))))) What's the benefit? Rhatt (who would rather soak in the Bahamas) |
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