Brake fluid seeping from SMC

Discussion in '5th Generation 1998-2001' started by faran, Sep 9, 2018.

  1. faran

    faran New Member

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    So I noticed some brake fluid seeping in the attached picture area.

    Is this cylinder rebuild able or needs to be replaced? Also its consuming brake fluid from rear reservoir alone, right?

    Should I disable LBS and ride like it or don't ride until I have fixed it?

    Also is it possible dirt or debris caused it? Thanks for the help.
     

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  2. Darth Vader

    Darth Vader New Member

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    Yes it is rebuildable there is a seal kit for it.
    It will be taking fluid from the rear reservoir, keep that topped up or you'll loose the back brake .Brake fluid attacks paint so dont leave it on your wheels neutralise it with water.
    It really needs looking at sooner rather than later . It might be dirt in there so id pull it apart , clean , reassemble , bleed and hope for the best if it still leaks seal kit.
     
  3. faran

    faran New Member

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    Thank you, so I just crack open two bolts for front caliper and then remove dust boot for SMC and then try to clean the area, correct?

    Also, when you say bleed then I would need to bleed all front and rear or just rear?
     
  4. Darth Vader

    Darth Vader New Member

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    The sms is on the caliper bracket so get it off and undo the brake lines and disassemble the thing. Youll need circlip pliers and check the condition of the seals and replace as necessary. Youll only need to bleed the back as the smc is on the rear circuit. Its a massive Pita though.
     
  5. OOTV

    OOTV Member

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    This is half correct, the rear pedal does activate the center pistons of both front calipers, so there might be a little bleeding of those two, other than that the front setup, two outer pistons on both calipers is separate and is generally fine as long as it was bled properly before hand.
     
  6. faran

    faran New Member

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  7. faran

    faran New Member

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    In that case, I would just be bleeding the fronts if I would be re-building SMC and won't be touching PCV and rear wheel bleeders, right?
     
  8. OOTV

    OOTV Member

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    Looks more like 26 is what you need. Although the one washer looking compment in the right of the 27 box, might be something that could need replacing.
     
  9. OOTV

    OOTV Member

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    Unfortunately no, the SMC sends fluid to the rear, so once you open that up, then you're introducing air into the rear lines. Since the rear pedal does the two front caliper center pistons, that is now part of the mix...
     
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  10. faran

    faran New Member

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    Thanks OOTV :D
     
  11. faran

    faran New Member

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    Ok, so I am leaving the SMC on the caliper.

    Is there a metal ring inside the dust boot cover '9'. Also, once I remove the snap ring I should be able to pull everything out or need to undo something else too?

    Can anyone please confirm it?
     
  12. OOTV

    OOTV Member

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    It's been some time since I've dealt with it but I recall that under the rubber boot is a snap ring, removing that allows you access to the plunger and seals. Evrything should just be able to be pulled out and replaced.
     
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  13. faran

    faran New Member

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    Thanks one last thing, I can see plunger has 2 seals(one on the top and other one on the bottom). Can those going bad cause some brake fluid seeping?

    https://www.partzilla.com/catalog/honda/motorcycle/2000/vfr800fi-a-interceptor/front-brake-caliper
     
  14. OOTV

    OOTV Member

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  15. faran

    faran New Member

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    Thanks OOTV, will give it a shot with rebuild and see what happens :)
     
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