Soft rear brake after recall

[stingray]

It hasn't been very long since I had the rear master cylinder recall done and it's already back to the soft pedal again on first pump. It pumps up quicker and hasn't failed, but I don't think the air intrusion problem has been fully resolved. Just be sure to pump them up real good, like you should, before heading out.

 

[technoguppy]

Sorry to be a PITA but any chance you could provide more details?

• When did you have it done (date)?
• What did you have done (there is a Service Bulletin from this year re: rear brake)?
• When did you notice it going soft (date or days later)?
• Did you ride it between service and it going soft?
• If you pump it, does it come back or it's all gone now?
• Any error codes?
• Temperature during parked time (this is when they figure it is losing its pressure) - Was it hot out, was it cold overnight, etc?

I've had it serviced 3 times by the dealer. The issue as I understand it, is that if you park the bike for an extended period of time (which one does in Canada), then the rear goes flat, loses pressure. Because it's tied into the ABS they have to service it fully at the shop. I have the official recall service scheduled for late April.

 

[stingray]

Sorry to be a PITA but any chance you could provide more details?

• When did you have it done (date)?
• What did you have done (there is a Service Bulletin from this year re: rear brake)?
• When did you notice it going soft (date or days later)?
• Did you ride it between service and it going soft?
• If you pump it, does it come back or it's all gone now?
• Any error codes?
• Temperature during parked time (this is when they figure it is losing its pressure) - Was it hot out, was it cold overnight, etc?

I've had it serviced 3 times by the dealer. The issue as I understand it, is that if you park the bike for an extended period of time (which one does in Canada), then the rear goes flat, loses pressure. Because it's tied into the ABS they have to service it fully at the shop. I have the official recall service scheduled for late April.

I had the recall done Nov. 21 2023 and it has been ridden weekly or two at most. So less than 4 months since the recall was done with steady riding. Not sitting around in storage by any means. Winter in Texas goes from 90f to 20f, stored in garage riding above 50f. Like I said before,
"It hasn't been very long since I had the rear master cylinder recall done and it's already back to the soft pedal again on first pump. It pumps up quicker and hasn't failed, but I don't think the air intrusion problem has been fully resolved. Just be sure to pump them up real good, like you should, before heading out."

 

[technoguppy]

I had the recall done Nov. 21 2023 and it has been ridden weekly or two at most. So less than 4 months since the recall was done with steady riding. Not sitting around in storage by any means. Winter in Texas goes from 90f to 20f, stored in garage riding above 50f. Like I said before,
"It hasn't been very long since I had the rear master cylinder recall done and it's already back to the soft pedal again on first pump. It pumps up quicker and hasn't failed, but I don't think the air intrusion problem has been fully resolved. Just be sure to pump them up real good, like you should, before heading out."

So in essence, three things could be true...

1. Your service department didn't do the job correctly (always a possibility no matter where you go)
2. Triumph hasn't fully resolved the issue yet
3. Could be your bike (I doubt it but it has to be included in viable consideration)

My money is on 2. In any case, they (we) need a proper fix that lasts more than a week or two.

 

[stingray]

I'd say #2 since it worked fine for a few months. It lasted around 12 weeks before noticeable softness and has gotten progressively worse to needing an extra pump while riding in the last month.

 

[AussieRider]

After having the recall applied to replace the rear master cylinder in Nov 2023, this year (Jan 2025) I noticed the rear brake pedal is soft again. Is anyone else still having this problem after the master cylinder replacement?

 

[stingray]

The recall DID NOT FIX the problem. I'll have to bleed mine again just to get an inspection sticker. Front brake also. It can't be the Brembo components as the same ones are used on other bikes without the issues. This brake system is badly engineered and very unsafe. All the air collects in the ABS module (high point of system) Take a ride through the mountains and tell me how it is OK.

 

[2023R3GT]

Mine did the same, that said the dealer did a manual bleed on the system and its been around 10 months without any issues.
what is the condition/wear on the pads?
Hope you get it resolved.

 

[stingray]

Just google triumph rocket 3 brake recall

The cause of the problem​

Triumph has investigated the problem and found that the original 12.7 mm rear brake cylinder is no longer able to move the brake fluid the required distance due to the natural formation of air bubbles in the brake fluid. The resulting air in the brake lines can lead to longer brake pedal travel, especially if drivers do not carry out the recommended safety checks before setting off.

The remedy​

Triumph’s solution to this problem is a larger, 14.0 mm rear brake cylinder, which displaces a higher volume of brake fluid. This difference in size can overcome any air bubbles in the brake line. Triumph further recommends that all riders carry out daily pre-ride safety checks to identify potential problems (including this one).

This didn't fix the issue. You just have to pump it less.

But it's your fault for not noticing the brakes are out.

 

[Moz]

Another one here too...
Had a soft rear brake originally, recall with new parts performed & seemingly all good for a few months (ridden once a week). Bike had a about 2 weeks of not being ridden and the soft rear pedal is back now.
Service due in 3 weeks so will be looked at then.