Another rotor question

[oz353]

The front rotor of these bikes is classified as a floating rotor, on a good rotor should the actual contact area wiggle/rattle or should it be stiff? Is some play ok? I have one that wiggles and one that doesnt.   

:edit: I feel like this is a stupid question for a mechanic to be asking...(hanging head in shame)

[oz353]

(bump) .......anyone?

[slipperymongoose]

Far as I can see off mine nothing should have movement. A picture would help where is the movement specifically

[comradeiggy]

Floating rotors should have a tiny bit of side to side play if you hold the inner section secure and wiggle the outer part side to side.

[BaltimoreGS]

Floating rotors should have a tiny bit of side to side play if you hold the inner section secure and wiggle the outer part side to side.

What he said.  I've seen floating rotors get excessive play.

-Jessie

[oz353]

ok but it shouldnt sound like a tamborene when i shake it right? haha! so one rotor i have is good the other (from my 89) is bad.

[slipperymongoose]

Yeah if your rattling that's bad lol

[gsJack]

Floating rotors move a bit from side to side on the hubs but some move easier than others. Can be hard to move on some depending on tolerences.  Also, after many miles the rotors will move a bit circumferentially due to wear.  With the wheel on the ground you can turn the rotor back and forth by hand a wee bit with a click-click after it's worn many miles.  If you hear a click hitting the brake when pushing bike back and forth that could be it.  I have a 97 front wheel with about 120k miles on it and a 02 front wheel with over 90k miles on and both are clickers.  When your front rotors start clicking you qualify as a real gstwinner!