Rear brake

[Barrel]

On motorcycles with slipper clutches like this one, is using the rear brake activating the slipper function? If so, by subtracting some engine braking it is reducing the total deceleration available. That might explain why the rear brake feels flat in its response and power.

My understanding is the rear brake is fully independent of the clutch. The slipper part of the clutch is just a set of internal ramps in the clutch housing which the wheel driven clutch plates ride up when spinning very fast. This separates the clutch plates further as they spin faster - enough to allow clutch slip. Hence the name.
Rear brake is just hydraulic from pedal to the rear brake calipers though there is a lot of ABS based plumbing attached which doesn't help the feel.
Also I should have added in my earlier comment rear brake also needs IMHO to be (at least) warm to work at all well.

[kman0066]

I popped the big spring off the rear brake pedal (the one not connected to the brake light switch), and Bam, great brake feel. The spring is just plain too stiff. It makes you think you are applying significant pressure but the lever really does nothing for the first bit of travel. So no spring for me has solved the rear brake feel.

I should add that no track bike I've ever had, had a spring installed on the lever. I'm pretty sure the idea is to make the pressure of the person pushing on the rear feel similar to the front while still providing the 80% braking to the front like it should be. Dunno though, the spring is ridiculous on this bike is all I can say for sure.

[KiwiKodi]

I popped the big spring off the rear brake pedal (the one not connected to the brake light switch), and Bam, great brake feel. The spring is just plain too stiff. It makes you think you are applying significant pressure but the lever really does nothing for the first bit of travel. So no spring for me has solved the rear brake feel.

I should add that no track bike I've ever had, had a spring installed on the lever. I'm pretty sure the idea is to make the pressure of the person pushing on the rear feel similar to the front while still providing the 80% braking to the front like it should be. Dunno though, the spring is ridiculous on this bike is all I can say for sure.

Thanks for the tip. Mine is now off - will test it tomorrow.

[cOoTeR]

I popped the big spring off the rear brake pedal (the one not connected to the brake light switch), and Bam, great brake feel. The spring is just plain too stiff. It makes you think you are applying significant pressure but the lever really does nothing for the first bit of travel. So no spring for me has solved the rear brake feel.

I should add that no track bike I've ever had, had a spring installed on the lever. I'm pretty sure the idea is to make the pressure of the person pushing on the rear feel similar to the front while still providing the 80% braking to the front like it should be. Dunno though, the spring is ridiculous on this bike is all I can say for sure.

Does this cause your rear brakes to drag slightly?

[kman0066]

I popped the big spring off the rear brake pedal (the one not connected to the brake light switch), and Bam, great brake feel. The spring is just plain too stiff. It makes you think you are applying significant pressure but the lever really does nothing for the first bit of travel. So no spring for me has solved the rear brake feel.

I should add that no track bike I've ever had, had a spring installed on the lever. I'm pretty sure the idea is to make the pressure of the person pushing on the rear feel similar to the front while still providing the 80% braking to the front like it should be. Dunno though, the spring is ridiculous on this bike is all I can say for sure.

Does this cause your rear brakes to drag slightly?

No, there is an internal spring in the master cylinder to prevent that. You can feel it when you are trying to bleed fresh brakes and notice the lever returns to the open spot, even with no fluid in the system. The additional spring on the outside is all about providing "feel" to the pedal. For me personally, I have better "feel" with it removed, but I'm also used to years of riding race bikes which aftermarket rear-sets, which don't have the additional springs.

If you want to test it, pop the bike on the center stand and spin the wheel before/after. Super easy on our bike with the center stand

[57x]

Ok guys. I figured out with trial and error that the crazy travel on the rear brake can be rectified. I pulled the spring and and was still irritated.

I cannot tell you how to fix it as I don't know exactly what I did. Here was my approach. I pulled the cover plate, put the screws back in without the heel plate and adjusted both the master adjuster and the switch screw. Both change the angle of the lever, and with playing with it, change the travel. I now have both the lever where I want it with very little travel. Once I everything adjusted I reinstalled the heel plate.

[THOR]

rear brakes on sports bikes are weaker too, normally you wouldn't use it to stop but to control the bike, turning, out of the corners or slow manoeuvre. if you really want a lot of power from rear brake, you must spend some money, get a new master, and may be good caliper with good pads, but with such a long wheelbase you won't really need it, if the front bites enough you won't need the rear, but I am assuming the front is weak too.

[Champ87]

....but I am assuming the front is weak too.

Why would you assume that? It's incorrect: the H2 SX has a good, powerful set of front brakes. There will be some who prefer more "bite', some who prefer less "bite", some who want a different feel. That's personal preference - a very different situation from weak brakes.

[THOR]

....but I am assuming the front is weak too.

Why would you assume that? It's incorrect: the H2 SX has a good, powerful set of front brakes. There will be some who prefer more "bite', some who prefer less "bite", some who want a different feel. That's personal preference - a very different situation from weak brakes.

read a few reviews and the power wasn't there they said, there is similar situation with Yamaha mt10 SP the brakes are for some great but for some horrible. I don't like if a break doesn't have enough bite and feedback, i do trail braking alot and feedback is everything. didn't hear good things yet. i will get m50 's soon as i get the bike, then go from there if i like the masters or not.

ONE WORD - If H2 SX SE brakes that good they should have fitted to H2R don't you think so?

[Champ87]

...read a few reviews and the power wasn't there they said,

As you yourself said "feedback is everything" but feedback and stopping power are not the same. Feedback is a personal judgement. Some people like brakes with a lot of initial bite because they feel more powerful - others would call them "grabby". Of course some bikes have brakes that are universally hated but that is not the case with the H2 SX.

If you don't like the feel of the brakes then that's a valid reason for changing to suit your personal needs. Calipers with the name "BREMBO" on them may have a feel that is more suited to your own preference. They may give you a more enjoyable riding experience but they're not going to stop you any quicker. That's because the stopping ability of the H2 SX is limited by the tires not the brakes.

ONE WORD - If H2 SX SE brakes that good they should have fitted to H2R don't you think so?

ONE WORD - No