Brake pulsating at lever

[posplayr]

Had the same exact pulsation on my 1100. It's warped rotor(s) plain and simple. I do machining by trade, made a spacial arbor stub to hold the GS rotors, and skim cut until I got the rotors to within the spec runout (I beleive it was .012" ) ? Mine were warped pretty bad, got them right at the spec limit, and pulsation was gone.

He also is running new EBC rotors which are floating so run out is not as much of an issue.

[crapwacker]

This does not explain how hard brake applications can fix so many pulsating brakes.
Just the other day I noticed my 750 starting to pulsate a little, went out an cooked them by braking hard a few times, now it is smooth as silk again.

If you have gotten contaminates on the rotors, they can pulse when applied lightly, but hard breaking can 'burn' off some containments.

[tkent02]

If you have gotten contaminates on the rotors, they can pulse when applied lightly, but hard breaking can 'burn' off some containments.

OK, believe what you want to.
I'll believe the experts this time.
All I know is it works.

[gearhead13]

Well, those links were interesting. But, with my calipers removed and by rotating the wheel I can see with my naked eye the rotor moving side to side in an irregular pattern.
These are the rotors I bought from a forum member (pousseux or something) here that wouldnt refund what I paid for them. deadbeat.

[tkent02]

But, with my calipers removed and by rotating the wheel I can see with my naked eye the rotor moving side to side in an irregular pattern.
These are the rotors I bought from a forum member (pousseux or something) here that wouldnt refund what I paid for them. deadbeat.

Well, yeah, those are probably not going to straighten out too easy.
So he's a deadbeat, huh?
I had not heard that.

[gearhead13]

I was looking at some new rotors on ebay for a decent price, but they are from China What do you think?

http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=320497528167&ssPageName=STRK:MEWAX:IT

[tkent02]

Some stuff from China is acceptable, some is not.
A lot of car brake discs come from there, but this is a bike, different stakes.
Try it and if it makes you crash, I won't try it?

[gearhead13]

LOL No I wont be your guinea pig.

[Road_Clam]

This does not explain how hard brake applications can fix so many pulsating brakes.
Just the other day I noticed my 750 starting to pulsate a little, went out an cooked them by braking hard a few times, now it is smooth as silk again.

Then it's not your rotors. You have developed Parkinson's Disease in your right index finger. Maybe it's time to see a doctor.

[tkent02]

ADD, Parkinsons, whatever.

Did you even read the stuff I posted?
It's not new, this stuff has been known for a long time, by some people.

[Road_Clam]

ADD, Parkinsons, whatever.

Did you even read the stuff I posted?
It's not new, this stuff has been known for a long time, by some people.

Do you even know how to laugh or not get pi$$y with everyone on GSR who writes a reply ?

[KEITH KRAUSE]

What are the other causes apart from warped rotors?
I believe the wheel bearings are fine too.

Could caliper problem cause it?

These are Kawasaki with the plastic inserts inside the piston that push against the pad... Maybe if they're worn at an angle or something? First time I have come across it like this.

The rotors are brand new EBC so I know they're straight!

Are you sure the pulsing is only at the lever or could the front end have a shudder that's most noticable at the bars and lever? Does it happen at a certain speed range (such as 40 to 60) or all the time?
A cupped tire can cause things that make you think you have a warped rotor. The cupping doesn't have to look that bad to cause problems.

[salty_monk]

It's 100% that it's brake related. Most noticeable at light pressure. The not "bedding them in" makes sense to me so I'll give that a go first...

Dan