April 29th, 2010, 01:27 PM | #1 |
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Name: Bob
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Who has worn through stock brake rotors?
I'm wondering how many miles people are getting out of their stock brake rotors. I don't recall the actual measurement, but when I replaced my brake pads, I had more wear on my rotors than I anticipated. I wasn't at the service limit yet, but it didn't look like it would last past the new set of pads. So what are realistic expectations re: rotor life?
Also, I have read conflicting info about aftermarket brake pads and rotor life. I'm running Gaffer HH pads (and have EBC HH in the ready in my parts bin), like them a lot, but wonder if they cost me rotor life, or if they are more forgiving. When it is time to order new rotors, is there a better option than the standard OEM parts suppliers (bikebandit, etc). They look a lot more expensive than I would have anticipated..... although most of the aftermarket ones are even MORE.... so maybe I have to just start saving my pennies, I don't know. |
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April 29th, 2010, 01:43 PM | #2 |
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12,000 so far on stock pads and rotors. not noticing any excessive wear. I am probably easier on equipment than most, or everyting will break at once!!
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April 29th, 2010, 08:48 PM | #3 |
CPT Falcon
Name: J.Emmett Turner
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April 29th, 2010, 08:49 PM | #4 |
You are sleeping
Name: Casey
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I'm not positive, I need to look again.. but I think the FSM noted to replace the rotors if they get thinner than 4mm.
Don't quote me I'm going to double check that right now. edit: replace front rotor at 4.0mm thick at thinnest spot (0.16") replace rear rotor at 4.5mm thick at thinnest spot (0.18") If the disk can wobble (left to right) more than .3mm (0.01") than it needs to be replaced as well. You can likely expect the rotor to wear much faster with upgraded pads. If you are stopping better, the friction is going somewhere..
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April 29th, 2010, 09:32 PM | #5 | |
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Quote:
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April 30th, 2010, 10:49 AM | #6 |
Psychic war veteran
Name: Thomas
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This has never been my experience with upgraded pads on street bikes.
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April 30th, 2010, 12:11 PM | #7 |
You are sleeping
Name: Casey
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So the upgraded pad takes all the extra abuse?
Any evidence to support this? I'm sure the rotor wears more. Weather or not it's noticeable is another story. When I upgrade pads on my flatland bike, the whole bike undergoes more wear because it acts at a higher performance.
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April 30th, 2010, 12:35 PM | #8 |
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Use more engine braking, use that energy to compress air instead of wearing out pads and rotors :P
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April 30th, 2010, 01:27 PM | #9 |
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Location: greenville, south carolina
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I've never worn a rotor out. I've cracked and/or blued a bunch though.
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May 1st, 2010, 12:55 AM | #10 | |
CPT Falcon
Name: J.Emmett Turner
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Quote:
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May 1st, 2010, 04:54 AM | #11 |
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Name: Casey
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Exactly. Equal and opposite reaction.
Something is giving way to the fact that you can stop better. (and likely use that fact to your advantage if you put better brakes on your bike) I'm going to agree to disagree with you. For one, increased tire wear.
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May 1st, 2010, 08:11 AM | #12 |
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Bob, how many miles do you have on your bike? It seems to new to wear out a rotor that quickly.
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May 1st, 2010, 10:48 AM | #13 |
CPT Falcon
Name: J.Emmett Turner
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It has nothing to do with stopping "faster" or "slower." Dragging your brake until you gradually stop takes the same force as stopping sooner according to Newton's laws except that you get to take advantage of more road, wind, and rotational friction when you take your time/distance. When comparing one pad to another you can apply more force to the inferior pad to stop just as soon but that is because it requires more to reach the same amount of friction on the disc. You see? The only extra force needed was from your hand. The same amount of surface drag (friction) on the disc was required to stop.
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May 1st, 2010, 12:52 PM | #14 |
ninjette.org certified postwhore
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I'm not quite there yet, but getting there. ~16k miles with 4.3ishmm on the front rotor. I was hoping to have a solution in place for when I got there, if there was one better than ordering OEM from the standard suppliers. If it is just expensive, well, I guess I should start saving.
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May 1st, 2010, 08:21 PM | #15 |
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You have put quite a few miles on your bike. I have 18,ooo on mine and the rotors are still within spec.
Do you travel down dusty roads? Sand and dirt can contribute to wear. |
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May 1st, 2010, 11:01 PM | #16 |
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May 5th, 2010, 02:35 PM | #17 |
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May 5th, 2010, 05:20 PM | #18 |
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September 5th, 2010, 09:33 PM | #19 |
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Oy, got the call from my local shop letting me know my front rotor needs to be replaced--$300+ for OEM, $200+ for EBC. Anyone know if one or the other is a better product? I don't mind spending extra for OEM if it's better, gotta make the decision on Tuesday.
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September 5th, 2010, 09:52 PM | #20 | |
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Quote:
edit... $285 from cheapcycleparts if that helps. |
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September 5th, 2010, 11:28 PM | #21 |
ninjette.org member
Name: Josh
Location: Sacramento, Ca
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I am curious about you folks still using stock pads having that many miles. I am at 3,000 miles on my stock pads, and just went in for a check up the other day and the shop told me absolutely must get new brakes asap as they are almost entirely worn down.
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September 5th, 2010, 11:47 PM | #22 |
Join Date: Nov 2008 Posts: Too much.
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brake rotors or brake pads? have you asked the shop what the measurements are that they are concerned about?
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September 5th, 2010, 11:58 PM | #23 |
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Name: Josh
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Just the pads are low. They said the pads need replaced and mentioned how thick the pads are but I forgot the measurement they said. I was just wondering if needing pads this early (3,800 miles) is a problem of if the people saying 12k on stock pads meant stock rotors.
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September 6th, 2010, 06:14 AM | #24 |
Gearhead
Name: Mike
Location: IND
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Engine braking meaning decelerating and downshifting. Easier on brakes because you don't need to use them as much or as hard like if you just pulled the clutch in and grabbed the brakes. Same goes for a car with a standard transmission. I just turned 7k and still have at least 40-50% left on my stock pads.
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September 6th, 2010, 10:55 AM | #25 |
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The Sunday Best | Current mileage: 50,000 |
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September 6th, 2010, 11:03 AM | #26 |
CPT Falcon
Name: J.Emmett Turner
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Craig AKA 2WheelGuy said that he has never had to replace a rotor when I recently asked this same question. Of course, he races and his use is distributed across multiple bikes, so that may have something to do with it.
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September 6th, 2010, 11:47 AM | #27 |
Join Date: Nov 2008 Posts: Too much.
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that's a lot of miles.
ask the dealer what the rotor thickness is to make sure you're getting close to the minimum thickness allowed in the manual. pads seem to go quickly on some bikes, but usually due to a riding style of leaving the rear brake partially engaged when they ride, but from what I've read on this forum, rotors seem to enjoy a long life. Exactly how long depends on how they are used. have you changed pads prior and did you use stock or aftermarket? sometimes aftermarket pads can be harsher on rotors and lead to accelerated wear at the expense of rotor life. |
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September 6th, 2010, 12:23 PM | #28 |
ninjette.org sage
Name: Chris
Location: Huntsville, AL
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I'm almost 11k on stock pads, but my fronts are in bad need of changing, and my rears are almost there.
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September 6th, 2010, 05:39 PM | #29 | |
ninjette.org guru
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Quote:
I'm on my third front pad, just installed it about 2,500 miles ago. I was using factory pads until then, but the newest pad is an EBC.
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September 6th, 2010, 05:46 PM | #30 |
Join Date: Nov 2008 Posts: Too much.
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27k is pretty good from a stock rotor, as I imagine you're pretty hard on the brakes?
No feedback on which is better, but there are used rotors on ebay for like $40, if you want to consider that option. http://cgi.ebay.com/ebaymotors/08-10...Q5fAccessories |
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September 6th, 2010, 06:08 PM | #31 |
ninjette.org guru
Name: Ryan
Location: San Francisco
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Thanks for the link! I'll definitely try eBay, $340 for a stock rotor is crazy.
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September 6th, 2010, 06:16 PM | #32 | |
Join Date: Nov 2008 Posts: Too much.
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Quote:
I know other people that have bought used front disks off ebay and have good results. gl |
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September 6th, 2010, 06:35 PM | #33 |
ninjette.org certified postwhore
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Changed pads at 12K. Rotors are still fine. Did change the brake lines to the SS Sielded. I have found that stopping power is improved and effort is less. Been hanging out with the racing types too long. Brake lines were an $80 mod installed. Money well spent.
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September 6th, 2010, 08:36 PM | #34 |
The Sportisi Master
Name: Matt
Location: Chico
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I can source OEM rotors for $150 shipped as a service to forum members. I refuse to let people pay nearly $300 for them or over $200 for the ebc's
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September 7th, 2010, 01:45 PM | #35 |
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I'm at 35,000 on stock rotors, I'll measure them tonight and find out if they're still within spec. I'm on my 4th set of pads up front. 2nd out back... :P
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September 7th, 2010, 02:13 PM | #36 |
The Sportisi Master
Name: Matt
Location: Chico
Join Date: May 2009 Motorcycle(s): 2008 Ninja 250 Posts: A lot.
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With some rotors I see they can warp if abused. 99.5% of ninja owners do not ride hard enough to do this (I don't care how spirited you think your riding is). I see the outer plating chipping off as a common occurrence. I would stick with Spooh's assessment and say the OEM rotor under normal operating conditions should last at least 3 sets of pads. Or roughly 25k miles.
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September 8th, 2010, 04:54 AM | #37 |
ninjette.org sage
Name: Matthew
Location: Toronto
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Hmmm maybe I should check my rotors.... Are they the same one as what's on the pregen? (thinking about the ebay option)
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September 9th, 2010, 04:25 PM | #38 |
ninjette.org certified postwhore
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The newgen went to the newer pedal rotor design. I don't know if the pregen will fit at the hub or not (or if the pads would be aligned properly)..... I personally wouldn't, but if it did work I don't see a problem with it. Just make sure before you buy. Also, if you buy from ebay, there is a greater possibility of getting a warped, or damaged, rotor. I'm not saying you will, just be aware of the additional risk.
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September 9th, 2010, 04:32 PM | #39 |
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Rotors are different sizes as well, the new-gens are 20mm larger. (Don't test me on what their actual sizes are, I forget whether they went from 240 - 260 or 260 - 280 )
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September 9th, 2010, 08:51 PM | #40 |
The Sportisi Master
Name: Matt
Location: Chico
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pretty sure the front is a 290 on the new gen but don't quote me on that
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