Rotors warped?

[clutchr6]

So yesterday I removed an old inspection sticker on the lower left fork. I used some WD40 to remove the old glue. some of it I guess got on the rotor/caliper.

So today I took the bike for a ride to get a bite to eat about 10 miles. No problems on the way there. Jump back on the bike and the second stop sign I come to I notice the break lever had to be pulled in more than usual. So I pulled over to make sure everything looked ok. Got home pulled the calipers off everything looks good.

The only thing I could think of is the rotor or both rotors are warped. As I ride its pushing the pistons back out and when I stop the break has a longer pull.

How can I test this I jacked up the bike, started spinning the front wheel engaged breaks works fine. Started spinning again and you can feel it rub a bit but i think this is normal.

Your thoughts??

[Wildwest450]

I wouldn't think that WD40 would warp a rotor. Perhaps it just made the rotor slick causing you to have to pull the lever more than normal to get normal results. I would think it would burn off rather quickly and return to normal.

[terryk]

Originally Posted by Wildwest450

I wouldn't think that WD40 would warp a rotor. Perhaps it just made the rotor slick causing you to have to pull the lever more than normal to get normal results. I would think it would burn off rather quickly and return to normal.

+1 and clean rotors carefully with denatured alcohol.

[Jbat]

def clean them off good, pads too. The fluid can soak into the pads and render them ineffective (yes that is my smart sounding sentence of the day)

[60ftgap]

320 sand paper and scuff your rotors. W-D on the rotors gets hot first time you ride and cooks the W-D to the rotor you get back on they feel warped.

[akitadog]

I would also check your front bearings. They could be just loose enough to push your brake pistons out.

Seen this before with chrome wheels.

[clutchr6]

i think Akitadog is on something. Because I just rubed the pads down with sandpaper along with the rotors went for another spin and when the lever is real loose to pull in I here a loud scrapping/ low clunking noise coming from the lower left. Maybe the caliper is bad?

As im riding it seems to get worse if i keep break checking everything is fine. If I go ten ft without it goes back to doing what it was doing.

[akitadog]

This is in the Mods page for a reason..

"Bearing - Wheel - Chromed Rims: Remove chrome from bearing area for proper press-fit."

Just saw you have chrome wheels and wanted to eliminate this possibility.

[clutchr6]

yeah the chrome wheels have been on the bike since I bought it last year. and the chrome was done in 06

[Big Daddy]

I don't know much about breaks, but could it be a fluid or bleeding issue?


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