LHRB kinda weak/soft

[Katoom]

So, I'm a new owner here with a '25 MX 1.2 which I'll use for track and trail same as I do my KTM 300. Still trying to get used to the nuances of this machine and the LHRB is a big one. In fact, I feel like I can squeeze this sucker through the bars and the rear tire doesn't even always lock up. I'm kinda shocked as this uses Brembo just like my KTM and on that bike man my brakes are strong. Just got me wondering if this is a common issue with these and if it's a MC thing or a brake pad thing, maybe air trapped in system?
I am sorry ahead of time if this has been talked about to death already

 

[AL_V]

I can easily lock up the back tire with the handbrake.
Try pumping it up and see if then it will lock up the rear tire. That will tell you if there’s air in the system. So if you can pump the brake lever, and then it won’t come as close to the handlebar, you do have air in the system.
If that’s the case, the best way to bleed is with a syringe, pushing the fluid from the caliper up to the master cylinder. The air wants to rise, so trying to push the air downward doesn’t work so well.

 

[RCard42]

It's been talked about to death. Before everyone else chimes in about how bad the LHRB is, count me as one who has no trouble locking up the rear with one finger, after one fill/bleed with a MitiVac, same as I've done on every vehicle I've owned for 30 years.

 

[Katoom]

I'll bleed the sucker before I spend and $$ and see how it goes!

 

[bodacious swgr]

It's been talked about to death. Before everyone else chimes in about how bad the LHRB is, count me as one who has no trouble locking up the rear with one finger, after one fill/bleed with a MitiVac, same as I've done on every vehicle I've owned for 30 years.

I guess I’ll be the first one to jump on the hate bandwagon for this thread. Had my Gen 1 Stark for almost 2 years now and the rear brake has always been horrible.

Noticeably less braking power compared to anything else I’ve ridden which is kind of ironic considering how fast the bike actually is. I’d assume my problem is slightly worse than yours however since my generation of bike was shipped with the formula master cylinder instead of brembo (supposedly this was later changed after some backlash). After my braking power has faded even more than usual I’ve decided to run a bleed on them as well as purchasing an oversized rear rotor to fix the stopping power issues + upgraded pads. I was going to go with the ninecnc one but have already had a bad experience with their surron linkage and saw pretty mixed signals on here so I’ll probably end up going with one on Motorsport for about double the price. Only time will tell if these will fix braking issues but I’ll be sure to post updates here so others can find a definitive solution.

 

[Katoom]

I think I've got my rear working better but it still does not have the stopping power that I "feel" I'm getting from a foot brake but as has been noted, from the foot you can generate a lot more force very easily.

 

[AbnormalWrench]

My rear brake locks up easily with 1 finger. As already said, the blead procedure is crucial. These are Brembo brakes with sintered brake pads - they are plenty grabby if there is no air in the system.