Dragging rear caliper 2014 roadster

1947UL

Standard Bore
Joined
Oct 7, 2019
Messages
5
Location
Toronto Canada
Ride
Harley Ultra classic limited ,triumph roadster
I’m Joe from Toronto...2014 roadster...I’ve a dragging rear brake I’ve completely disassembled both the master and caliper...the pistons just won’t retract enough...every thing seems in perfect order...any thoughts ...it’s a Nissin master and Brembo Caliper..😡
 

Gregger

Nitrous
Joined
Nov 2, 2013
Messages
1,483
Location
Timmins, Ontario
Ride
2012 Rocket Roadster
Can you push the pistons back easily with a screwdriver? If so they are not seized. The pistons in the rear caliper only have to move back a few thousands of an inch otherwise you would have too much travel on the rear brake pedal when trying to engage the brake (since the pistons would have to travel the extra distance to cause the pads to grab the rotor).

Some reasons for dragging brakes:
- as Canberra stated.... pads too thick (were they just changed?)
- warped rotor
- bad wheel bearing
- loose axle nut resulting in a loose/floating wheel
- cracked bearing bore in rear wheel
- seized caliper on pins, or seized pistons
- sticking master cylinder
- dragging foot on brake pedal
- rotor too thick (ie non oem)
 

1947UL

Standard Bore
Joined
Oct 7, 2019
Messages
5
Location
Toronto Canada
Ride
Harley Ultra classic limited ,triumph roadster
Can you push the pistons back easily with a screwdriver? If so they are not seized. The pistons in the rear caliper only have to move back a few thousands of an inch otherwise you would have too much travel on the rear brake pedal when trying to engage the brake (since the pistons would have to travel the extra distance to cause the pads to grab the rotor).

Some reasons for dragging brakes:
- as Canberra stated.... pads too thick (were they just changed?)
- warped rotor
- bad wheel bearing
- loose axle nut resulting in a loose/floating wheel
- cracked bearing bore in rear wheel
- seized caliper on pins, or seized pistons
- sticking master cylinder
- dragging foot on brake pedal
- rotor too thick (ie non oem)
Yes pads were just changed...they are ebc,s .I’ll bet that’s the problem...also the one pin was seized,repaired that...any ideal of thickness of the oem pads...cheers guys..
 

1947UL

Standard Bore
Joined
Oct 7, 2019
Messages
5
Location
Toronto Canada
Ride
Harley Ultra classic limited ,triumph roadster
I’m Joe from Toronto...2014 roadster...I’ve a dragging rear brake I’ve completely disassembled both the master and caliper...the pistons just won’t retract enough...every thing seems in perfect order...any thoughts ...it’s a Nissin master and Brembo Caliper..😡
 

1947UL

Standard Bore
Joined
Oct 7, 2019
Messages
5
Location
Toronto Canada
Ride
Harley Ultra classic limited ,triumph roadster
Update on the dragging rear caliper...I repalaced the line with a Russell braided steel line and fittings..I bypassed the ABS...it seems to be a ABS problem...pistons are returning much better...And the brakes are much stiffer without the sponge...I’ll be doing front lines as well ...And removing the abs unit...Cheers Joe
 

Gregger

Nitrous
Joined
Nov 2, 2013
Messages
1,483
Location
Timmins, Ontario
Ride
2012 Rocket Roadster
Joe,
I just noticed this in your first post. You stated the caliper was a Brembo. I didn't know Triumph put Brembos on the Roadster??? Was it ever replaced? Could that be the problem?

Never mind.... I just check the spec sheet and it's a Brembo?? Oh well.
 
Last edited:

1947UL

Standard Bore
Joined
Oct 7, 2019
Messages
5
Location
Toronto Canada
Ride
Harley Ultra classic limited ,triumph roadster
Joe,
I just noticed this in your first post. You stated the caliper was a Brembo. I didn't know Triumph put Brembos on the Roadster??? Was it ever replaced? Could that be the problem?
I’ve had the caliper apart Was in perfect shape...by running the line directly to caliper I’ve eliminated the ABS ...works great now...
 

Similar threads

Top
AdBlock Detected

We get it, advertisements are annoying!

Ad-blocking software does a great job at blocking ads, but it also blocks some useful and important features of R3Owners. For the best possible site experience please take a moment to disable your AdBlocker for R3Owners.Net.

I've Disabled AdBlock