Rear Brake

[stollydriver]

Just took the Rocket for a short ride ( work spoils my fun ) getting back home - rode onto the drive and there was no rear brake. The pedal has normal travel but there is zero brake efficiency. Thought i had avoided any rear brake issues 2020R3GT

 

[atomsplitter]

I just had the same experience on my T-120 front brake. Usually before I take off, I pump the brakes just to be sure all is well, this time I backed the bike out and hit the brake as I was coasting down my drive backwards and nada. Took a couple pumps at the lever to arrest my progress. Triumphs are the only bikes I've owned that when sitting for extended periods can lose brake hydraulic pressure. Usually, a standard brake bleed gets it right again.

 

[Yamabushi]

I had the same issue with a 2026 Speedmaster but I ended up selling it. My 2026 R3 GT hasn't had that problem in the first 800 miles.

 

[Rick111]

I just had the same experience on my T-120 front brake. Usually before I take off, I pump the brakes just to be sure all is well, this time I backed the bike out and hit the brake as I was coasting down my drive backwards and nada. Took a couple pumps at the lever to arrest my progress. Triumphs are the only bikes I've owned that when sitting for extended periods can lose brake hydraulic pressure. Usually, a standard brake bleed gets it right again.

My sons Ducati desert sled does that.

 

[ciderbaby]

I've a 2024 R3R. Shortly after getting it I had rear brake issues. It was bled once by the dealership at 600km. Now 16k Kms no issues since.

 

[RUN666]

It’s a perennial issue with Triumphs—especially the new 2.5L Rockets—likely due to the linked front/rear braking system and the placement of the ABS unit right above the engine. It heats up the brake fluid—gets it really hot—causing air bubbles and making the rear brake act up! You have to use Motul RBF and bleed the system frequently. So much for "unmastered" technology... :-(

 

[Einar]

It’s a perennial issue with Triumphs—especially the new 2.5L Rockets—likely due to the linked front/rear braking system and the placement of the ABS unit right above the engine. It heats up the brake fluid—gets it really hot—causing air bubbles and making the rear brake act up! You have to use Motul RBF and bleed the system frequently. So much for "unmastered" technology... :-(

If that's what it was, they'd all do it (mine doesn't) and the issue would go away after the vapor cools and returns to liquid form (but DOT 4's boiling point is way above the temperature the engine should ever reach).

 

[RUN666]

I realize that not all motorcycles do this... but where do you live, and how do you ride? I think the operating temperature and your riding style influence the DOT fluid temperature. From my perspective, the linked braking system is also a factor...