Brake pad life - what's to be expected

[Koinz]

Re: rear brake pads

The ecu for the abs/UBS (unified braking system) vary the pressure and control through sensors while the bike is moving. When the bike is stopped UBS Is deactivated and only the rear brake pedal activates the rear. That's the super simple explanation.

 

[EricV]

Re: rear brake pads

Bleeding is my next step but why does rear work with the rear brake pedal

The rear pedal only actuates the rear brake system. The front actuates the front, and some to the rear via a proportioning valve. The ECU decides how much, based upon load and the ABS sensors that are telling it if there is any difference between front and rear wheel speeds. It's more complicated than that, but that's the simple idea. At stop, w/o the engine running, there is no ECU input or load, even if the bike is on, so no into to decide how much rear to add to the front braking.

IOW, if you didn't test it while riding, your assumption that the front is not actuating the rear may be mistaken.

 

[Tony99]

Re: rear brake pads

Thanks Eric. How can I see if the rear is working

 

[EricV]

Re: rear brake pads

Thanks Eric. How can I see if the rear is working

Disengage the ABS, then dive into a wet corner at about 80 mph and slam on only the front brake, it the back comes around, you'll know it wasn't working.

Wait, let me check the service manual and see if it offers a more reasonable suggestion.

 

[Koinz]

Re: rear brake pads

I think Yamaha has a special tool to verify correct operation of the abs pump and sensors. I think it's that self test coupler. Tried to order one, but couldn't for some reason. I think people have made them, it's some sort of a jumper connector.

 

[EricV]

Re: rear brake pads

I think Yamaha has a special tool to verify correct operation of the abs pump and sensors.

They do. It plugs in under the seat. Cautions are that below 10.0 V the system will not activate. After all the testing, they suggest a trial run at speeds over 30 kph. There isn't a simple test, only one described with a test coupler in place that causes the lever and pedal to pulse.

Honestly, I'm not sure how you would verify that the linked UBS is working in a safe and reasonable way w/o the test coupler. The bike will tend to squat more, dive less if the rear brake is activated by the front lever during braking, but you may or may not be sensitive to that.

 

[markjenn]

Re: rear brake pads

Thanks Eric. How can I see if the rear is working

If all you've done is change pads, and the rear works fine with the rear pedal, I think you can just assume you're good to go. You'd get a fault in the system if something were amiss.

- Mark

 

[Koinz]

Re: rear brake pads

Or you can try ericv's method ;D

 

[EricV]

Re: rear brake pads

I like Mark's suggestion better. And that's not something I say every day! ::025::

 

[Tony99]

Re: rear brake pads

Thanks guys you have gone above the call of duty here. It probably is working I guess I had not ever hit the brakes before when it was on the center stand.

 

[Racing Snake]

Re: rear brake pads

i got over 19000 miles on mine. anyone know a cross reference number from ebc to brembo?

I've just fitted brembo all round to mine and they are good . Went for the SC compound .

Check the brembo website it's all there for the part numbers . The rears are 07ya39.sp

 

[Racing Snake]

Re: rear brake pads

Thanks Eric. How can I see if the rear is working

Feel the heat man !!


Don't get burnt though

 

[Tony99]

Re: rear brake pads

I hate to trouble you guys again, but could someone put there tenere on the centerstand and see if the handlebar brake lever locks up their rear wheel. Thanks

 

[markjenn]

Re: rear brake pads

I hate to trouble you guys again, but could someone put there tenere on the centerstand and see if the handlebar brake lever locks up their rear wheel. Thanks

Tried it yesterday to confirm my advice to you earlier..... handlebar lever does not stop rear wheel with bike on centerstand, engine running or not. If you're really worried about this - and I wouldn't be - RS's idea of making a few/repeated hard stops with just the handlebar lever and checking the rear disc for heat is a good one.

- Mark

 

[Tony99]

Re: rear brake pads

Thanks Mark I am no longer worried, have a trip planned Thursday to WV. With a couple of BMW buddies don't need any problems.
Love this forum and all the help

 

[dcstrom]

Re: rear brake pads

Just changed out a set of EBC rear pads at 35,000 miles, with still a bit left. Happy with that, after getting 9000 and 5000 out of two sets of Yamaha pads...

 

[dcstrom]

Re: That's the last time I buy Yamaha rear brake pads...

Just changed rear pads again, 35,000 miles from EBC HH, with a few thousand to go. Never going back to stock pads!

 

[yz454]

Re: That's the last time I buy Yamaha rear brake pads...

This is a UBS thing between the fr and rear it can,t decide on how much rear to apply verses the fr ,especially if riding two up or with weight in the hills. I have talked with yamaha about this.

 

[jimmy z]

Re: That's the last time I buy Yamaha rear brake pads...

I think if you tap rear brake 1st it disables ubs for that braking event.Jim

 

[rbernie]

Re: That's the last time I buy Yamaha rear brake pads...

I swapped the stock pads for EBC HH rated pads at less than 3K from new, simply because the stock pads didn't give nearly the initial bite nor overall power that I wanted for a given amount of lever pressure (especially in the rear). I've used the EBCs in the past and been very pleased with their feel.