brake pulse while braking

[GS1100ez]

when i hit the brake, not full on, but nice and easy for a slow down

i get a pulsing in the front brake lever
and the bike tends to jump some too
its almost like on off on off on off
is this the antidive?

i replaced the brake pads and made sure the calipers could slide back and forth on the slides
the reason i did the brakes was because i had this problem and they would squeal when i touched the brakes (previous owner wore them down to the metal)

anything i should look for?
any ideas?

[neilaction]

Check if the rotors are true.
Not warped or bent.

[Nessism]

Yup, sounds like a bent rotor.

[Bribird]

sounds like warped rotors to me.

[NICK!]

Yep, GS1100EZ's are famous for warped front rotors and the brake lever will act exactly like yours is. Get a dial indicator on there and see.

If you spring for new rotors torque them properly with a torque wrench, that will help keep them from warping.

Frankly, I've seen one pucker stop from top speed warp GS1100EZ rotors. I believe the ED's are the same but there were far fewer of those back when, we sold a couple hundred EZ's and only a couple dozen ED's so I've got less data points.

[bonanzadave]

we sold a couple hundred EZ's and only a couple dozen ED's so I've got less data points.

EZs: Twisted cranks and warped rotors. Im on my second crank and third rotor set.

PS: Speed wobbles (steering head bearings) & Blown RRs

[Larry D]

First of all check your rotors, especially if there's been metal contact with the shoes.
Does the whole front end jump up and down ? How many miles on the bike ? Are the symptoms you describe only when braking ?

Just thinking it could be a steering stem bearing.

[mike-s]

Ugh, that reminds me that i need to add "rear brake pads" to the list of things i need to get for my RF900. All those suggestions aside, get it checked, you may be lucky and just find that there's a possibility that the disc is mounted lopsidedly as opposed to being bent.

[GS1100ez]

there are almost 16k on the bike
it only does it when im on the brakes

i would say the front end does move up and down a little but thats prob due to the brakes coming on and off


will gs1100l rotors work on the e?

my father has 2 sets in the basement for his ls id like to throw them on to make sure its the rotors that are the problem, even tho that was my first incling

[Larry D]

If it only only does it while braking, I'd say rotors too.
You can compare parts numbers for the rotors to see if they are the same here.....

http://www.alpha-sports.com/

[GS1100ez]

it apears they are the same part number

is there any reason why the e eats them more then the ls?

[bonanzadave]

is there any reason why the e eats them more then the ls?

Could be riding style. When I was younger and rode my E with reckless abandon (aka wes cooley wana be) I warped 2 sets. Now I ride it like an L and they seem to be fine.

PS: Your pulsing brake lever is definitely warped rotors but have you ever tightened or adjusted the steering head bearing torque ? Its easy to do but you have to do it with the triple tree fork clamps loose.

[spyug]

No question rotors.

If you can't check them with a run out indicator, use a piece of glass pane. Lay the rotor down on it gently (flat side). The rotor will rock slightly and or you can slip a piece of paper between it and the glass. Even a few thou will cause a problem.

Hope this helps.

cheers,
Spyug