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Radial Calipers alignment

sasquatch

sasquatch

Active member
Joined
Mar 5, 2002
Location
Hillsboro, OR
Moto(s)
one or another
I just changed the front tire on my Tuono and the calipers are not centered over the rotor. With the caliper pistons all the way pushed in and the calipers installed, the rotor is rubbing on the inside of each one. I don't see any way to adjust the left to right placement since the calipers are bolted to the fork ends.
2005 Tuono Factory with Ohlins and radial Brembo 4 pad calipers.

I have an Axial wheel
http://www.apriliaforum.com/forums/attachment.php?attachmentid=173777&stc=1&d=1278341709

110mm and needs to be 115mm
There is a spacer.
Thanks everyone.
 
Last edited:
Sounds like you might be missing the spacers positioned between the brake caliper and the brake mounts.

In the photo below notice the silver spacers between the brake caliper and the brake mounts. Not Ohlins/Brembo in the photo but the same idea applies.
 

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sasquatch said:
I just changed the front tire on my Tuono and the calipers are not centered over the rotor. With the caliper pistons all the way pushed in and the calipers installed, the rotor is rubbing on the inside of each one. I don't see any way to adjust the left to right placement since the calipers are bolted to the fork ends.
2005 Tuono Factory with Ohlins and radial Brembo 4 pad calipers.
Click to expand...


I had the same problem with my set-up, and remedied it only by measuring how much off-center the rotor was inside the caliper as best I could, then having spacers made to use with the rotors against the wheel. See my post here for my detail of that adventure.
 
sinncere said:
I had the same problem with my set-up, and remedied it only by measuring how much off-center the rotor was inside the caliper as best I could, then having spacers made to use with the rotors against the wheel. See my post here for my detail of that adventure.
Click to expand...
Exactly the problem, but not quite the same
This is OEM factory setup.
Both calipers rub on the inside of each rotor
I would have to space the rotors out from the rim
 
Maybe I'm misunderstanding something, but I read your problem like it was the exact same as mine; I also had to space my rotors out from my wheel.
 
wheel spacers in place?

axle installed properly?

axle bolt/nut and pinch bolts tightened in the proper order (see FSM)?

left caliper on L and right caliper on R?
 
it's rubbing on the caliper body? if yes, then obviously something was not installed correctly because no way you could have ridden with it like that.

check the forks too. grab the bottom and see if there's play side to side. I had to replace the bronze bushings inside a RSVR ohlins before.
 
fast4d said:
it's rubbing on the caliper body? if yes, then obviously something was not installed correctly because no way you could have ridden with it like that.

check the forks too. grab the bottom and see if there's play side to side. I had to replace the bronze bushings inside a RSVR ohlins before.
Click to expand...

Not on the caliper body
But the finger that holds the pad

http://www.youtube.com/watch?v=vn-M35sngf4

Not my bike but you can see the fingers.
 
ALANRIDER7 said:
Was the wheel installed backwards?
Click to expand...

Nope, big arrow on the wheel pointing the correct direction
The key thing is both rotors are rubbing on both calipers on the inside.
1mm spacers on both rotors would most likely align the rotor in the center.
 
sasquatch said:
Nope, big arrow on the wheel pointing the correct direction
The key thing is both rotors are rubbing on both calipers on the inside.
1mm spacers on both rotors would most likely align the rotor in the center.
Click to expand...

ya this is why i asked "axle bolt/nut and pinch bolts tightened in the proper order (see FSM)?"

if the calipers are being rubbed on the inside, then the fork lowers are spread too far apart. this can happen if the pinch bolts were tightened before the axle. id remove the calipers, loosen the pinch bolts, torque the axle, bounce the front end (no brakes), then check the caliper alignment again.
 
sasquatch said:
Nope, big arrow on the wheel pointing the correct direction
The key thing is both rotors are rubbing on both calipers on the inside.
1mm spacers on both rotors would most likely align the rotor in the center.
Click to expand...

This makes no sense. If it worked before, why isn't it working now?
 
Maybe he never noticed it before until his recent tire change. I was using mine like nothing was wrong well before I noticed the misalignment, and only realized it after I noticed my inside and outside pads weren't wearing down evenly.
 
sinncere said:
Maybe he never noticed it before until his recent tire change. I was using mine like nothing was wrong well before I noticed the misalignment, and only realized it after I noticed my inside and outside pads weren't wearing down evenly.
Click to expand...

This is exactly right.
First time I had the front wheel off and the pads were worn weird. Bought new pads the same time I got new tire and figured I had a stuck piston.
Cleared / cleaned the pistons and put everything together
What is the right way to do it?
Tighten pinch bolts on nut side of axle
Tighten axle nut
Bounce front end
Tighten other side pinch bolts.
 
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