LHRB weak pressure

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Thread: LHRB weak pressure

  1. #1

    Join Date
    Dec 2011
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    LHRB weak pressure

    Hi
    Just finished setting the bike up with rekluse and the LHRB. The rekluse works perfect, but the brake feels quite weak like there is not quite enough pressure on the rear disc. I bleed the system and it feels right when I pull the lever.... anyway it's almost impossible to block the rear wheel even if I pull it hard. I use the magura clutch master with 9mm piston, but I even tried to use the front brake master by rewiring the hoses... the same deal, just not enough pressure. So my question is should I change to better pads or ??? Do any other then me experience this problem?
    please comment on that

    btw the bike is the exc 450 05'

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  3. #2
    Teenage Moto tonytone's Avatar
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    dont think you can use the magura with brake fluid m8......might be wrong though.

    i have my rear brake running from a brembo clutch master and there is loads of bite......doesnt need much pressure.
    when i installed it i couldnt get it right by back bleeding it......did it from the clutch master using a one way valve on the caliper bleed nipple and it worked spot on.

  4. #3
    The "Moto" thebarber's Avatar
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    Magura uses mineral oil, don't think the seals ll last long.

  5. #4

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    Yes, I'n kind of aware that the magura goes with the mineral oil, nevertheless it should provide enough pressue with the small piston diameter at least untill the seals go bad. But thanks for the comments, I guess I try with a different disk and pads, cause I (quite) sure it's not the master thats faulty

  6. #5
    The "Moto" thebarber's Avatar
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    how bad is it???
    coz the lhrb's not gonna have as much power as the foot brake, i've got the dual brake on mine and when i pull the lhrb then put me foot on t pedal, it pushes the lhrb out.

  7. #6
    Junior Moto fergzx9r's Avatar
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    Ello mate,

    I have rekluse and lhrb and the rear brake is magic :o) I use one finger on each lever when going downhill, slightest pressure can lock both wheels.

    The comments about the Magura are correct. I had a 200 with a Magura when i got my first rekluse and spoke to both D3 and the Rekluse importer who both said the Magura does not produce enough pressure to activate the rear brake. The newer ktms have brembo and it works fine. I bought a master cylinder along with my clutch.

    Also....................Dont go buying a disc unless the old one is twated. It could be your pads have become "infected" by some kind of oil or other shit, it can have a drastic effect on braking. Also i have found the lhrb a real bitch to bleed correctly. I could bleed the bitch all day and still no joy........until.........I bought 2 good quality syringes and push the fluid through from the caliper and sook it oot the other side :o) If your are doing it yourself tie rap the syringe loosly to the spokes or sumfink to stop air getting in when you put it down to empty other end.

    Seriously though........forget the Magura, it wont work and you will twat it. There is a good chance that if / when you sell the bike you will want to put Magura back on to operate the clutch and sell the rekluse and master if it does not fit your next bike.

    Phew........that was a bit of a rant ;o)

  8. #7

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    How bad it is? I can lock the rear on road if I pull it hard enough, but it’s quite another deal when I go off-road or ride in the forest. I tried to ask some people in the local forums but it’s like nobody had ever heard of the LHRB, btw I live in Denmark.

    You all agree that the magura don’t produce enough pressure, I d’like to question you on that. For what I now, the smaller the piston diameter in the master, the higher pressure you can produce, or did I missed something here? As far as I know the problem with the small diameter (9mm) occurs when the amount of brake fluid pushed into the system is too small, with the result that you are able to squeeze the lever all the way in until you hit the handle bar. That’s not the case I’m dealing with… I got a good feeling with the lever, the pressure on the slave is just not there.

    Could someone please tell me the diameter of the brembo clutch master piston? There is a number stamped somewhere beneath or on the side of the master cylinder. Mine says 9

  9. #8
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    the genuine Rekluse master cyclinder is a 9.5mm magura with seals fitted that dont swell up with brake fluid, the brembo is 10mm as fitted to later ktms.

    Out of the 2 i prefer the magura because its res is bigger and your less likey to loose the brake over all.

    Brake fuild in the OEM magura will fook the seals in no time, they start swelling pretty much straight away.

    The best IMO is AJP master off a scooter or something similair, loads of power and there cheap as chips on ebay

  10. #9
    The "Moto" PEC GAZ's Avatar
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    I use a 10.5mm magura off a 07 450sxf
    18 months and no problems .

    Had 2 rekluse magura's and they both burst seals .
    The AJP's are good but a right pig to bleed .


    BIG 4 strokes are the future again .

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