03 brakes

[FJRay]

Title says it all. Need a set of serviceable front rotors for an 03. Just getting ready for CFO and found that the old ones look like ****. Not metal to metal but really worn.

 

[charismaticmegafauna]

Title says it all. Need a set of serviceable front rotors for an 03. Just getting ready for CFO and found that the old ones look like ****. Not metal to metal but really worn.

Sorry I need to ask a question -- when the title says it all.

But, to clarify: the "not metal to metal..." comment got me wondering...

Did you wear-out pads and score the discs? Or, have the discs worn to less than minimum thickness (180 thousandths)? If the latter, were the pads stock compound or special? A ton of miles?

If you don't find good used, you may find aftermarket for less than Yamaha (maybe not?)? I once got a pair of front rotors from a dealer (happened to be Yamaha) that were replaced under warranty and MamaYama never asked for them (within the alloted time) -- they were just fine.

Good luck with your shopping.

 

[Dudewado]

Sent you a PM.

 

[FJRay]

Title says it all. Need a set of serviceable front rotors for an 03. Just getting ready for CFO and found that the old ones look like ****. Not metal to metal but really worn.

Sorry I need to ask a question -- when the title says it all.

But, to clarify: the "not metal to metal..." comment got me wondering...

Did you wear-out pads and score the discs? Or, have the discs worn to less than minimum thickness (180 thousandths)? If the latter, were the pads stock compound or special? A ton of miles?

If you don't find good used, you may find aftermarket for less than Yamaha (maybe not?)? I once got a pair of front rotors from a dealer (happened to be Yamaha) that were replaced under warranty and MamaYama never asked for them (within the alloted time) -- they were just fine.

Good luck with your shopping.

The bike has about 80k on it and it is the second set of pads. This second set was EBC HH pads and I never really liked them. The rotors are worn very uneven and are below spec. Aftermarket price is 212.00 each through Tucker Rocky. Havent looked elswhere. Looks like the problem is solved.

 

[SkooterG]

Ray - what is 'below spec'?

In my 2004 SM, the minium spec is incorrect. Did you measure an un-used portion of the rotor and compare that to the SM's given spec?

 

[FJRay]

Ray - what is 'below spec'?
In my 2004 SM, the minium spec is incorrect. Did you measure an un-used portion of the rotor and compare that to the SM's given spec?

They are so groved it is hard to get an accurate measurement and I don't have a ball micrometer. The groves look like they are at least.060 deep. A good used set has surfaced and with the state of the world I will try that route. If they had enough material on them I would machine them.

 

[charismaticmegafauna]

They are so groved it is hard to get an accurate measurement and I don't have a ball micrometer. The groves look like they are at least.060 deep. A good used set has surfaced and with the state of the world I will try that route. If they had enough material on them I would machine them.

Good that you found some good used ones.

.060" deep grooves -- WOW! That only leaves .080" material between the groove bottoms (assuming they're grooved on both sides?). What do you think caused it? The aftermarket pads? Did the OEM pads tend to groove the rotor (mine don't...)?

I don't think the rotors are intended to be re-surface-able (at least not very much)?

Ray - what is 'below spec'?

<.180" (.020"+ less than new std. -- .200")

 

[Grumpy]

The '03 uses the same rotors as the earlier R6's ......I believe that it's something like 1999 - 2001 R6's. I've been successful in buying used rotors off Flee bay. The last I bought I paid something like $50 for a pair. This worked for me, but maybe not for you?

 

[FJRay]

They are so groved it is hard to get an accurate measurement and I don't have a ball micrometer. The groves look like they are at least.060 deep. A good used set has surfaced and with the state of the world I will try that route. If they had enough material on them I would machine them.

Good that you found some good used ones.

.060" deep grooves -- WOW! That only leaves .080" material between the groove bottoms (assuming they're grooved on both sides?). What do you think caused it? The aftermarket pads? Did the OEM pads tend to groove the rotor (mine don't...)?

I don't think the rotors are intended to be re-surface-able (at least not very much)?

Ray - what is 'below spec'?

<.180" (.020"+ less than new std. -- .200")

The rotors were fine before the EBC pads. Some slight scoring but nothing to worry about. As near as I can tell there is about .120 left on the worst one. Last time I didn't take the calipers apart to clean them but I will this time and I have new factory pads to install.

They are not designed to be resurfaced but I would try it just because I have the equipment to do it. Ther isn't enough material to work with

As usual a great response from the forum and what appears to be a solution to the problem

 

[SkooterG]

Ray - what is 'below spec'?

<.180" (.020"+ less than new std. -- .200")

See, that is the incorrect info. I know that is what is given in the service manual, but go measure the 'unused' portion of your rotor, and you will find that thickness to be less than .1800"

Clicky for my actual rotor measurements.

 

[charismaticmegafauna]

Ray - what is 'below spec'?

<.180" (.020"+ less than new std. -- .200")

See, that is the incorrect info. I know that is what is given in the service manual, but go measure the 'unused' portion of your rotor, and you will find that thickness to be less than .1800"

Clicky for my actual rotor measurements.

I have an '03 with a little less than 60K miles (stock pads) and measured my rotors -- .200" (maybe a thou' or two less?).

Is it an '03 v/s later issue?

 

[SkooterG]

I have an '03 with a little less than 60K miles (stock pads) and measured my rotors -- .200" (maybe a thou' or two less?).Is it an '03 v/s later issue?

Apparently. In the other post at the link I gave above, ALFJR discusses how the specs are different in the service manual 'supplement' that came out for 04 models. (One of these days I'll figure out where I put mine) According to him, minimum rotor thickness went from 4.5mm, to 4.0 mm from 2003 to 2004 as the rotor diameter went from 298mm to 320mm.