998 998 Spray On Screen After A Long Run

Discussion in '748 / 916 / 996 / 998' started by Dr.D, Oct 28, 2014.

  1. Hi all,
    After a run, I have a fine spray of fluid, I presume to be brake fluid on my screen above the front master cylinder ( above right on screen above bars . It is not all the time, but after a long run, I think possibly when braking heavier, I don't notice it when say just popping out to put petrol in.
    I thought it was possible the reservoir cap not on properly ( tricky to get to with screen in place ), or rubber perished... Nothing much... However my dad decided throw a cat amongst the pigeon and say well it shouldn't pressure in the master cylinder and spray fluid out even if it not on properly it must be over pressurising and have your whole brakes system checked.... Anyone have any ideas? I was just going to replace a cap / rubber and all would be good but now he worries me, and I will need a trip to the dealer / garage?
    My bike ride and stops perfectly fine.
    Cheers
     
    #1 Dr.D, Oct 28, 2014
  2. Are you sure its brake fluid ? Could it be antifreeze from your header tank when hot. I presume the 998 has the same plastic header tank as the 748/916 which are prone to cracking.
    Steve
     
    #2 Birdie, Oct 28, 2014
    • Agree Agree x 2
    • Like Like x 1
  3. As above, sounds like the coolant tank.
     
    #3 Dukedesmo, Oct 28, 2014
  4. Cheers guys, I am not much for a mechanic, ( although steadily learning bits and pieces ) where and how do I check this coolant tank, which seems to be the culprit.
    Cheers
     
    #4 Dr.D, Oct 28, 2014
  5. The tank is located around the headstock in front of the ignition barrel, they tend to crack on the seams although mine went at the bottom of the filler neck, try getting it up to temperature when the fan cuts in and have a look.
    Steve
     
    #5 Birdie, Oct 28, 2014
  6. Thanks Steve, fingers crossed this is it.
    Cheers
    Arnie
     
    #6 Dr.D, Oct 28, 2014
  7. My last one failed between the filler and the side outlet and when the bike got really hot sprayed a mist over the inside of the screen and my hand.

    I had several fail; 3 in the space of a few months and one of them leaked from the outset - I got this one replaced FOC by the dealer but another dealer told me "no warranty" when I had a failure after a few weeks - not exactly confidence filling.

    I gave up with the OEM tank a few years back and replaced it with a custom aluminium jobbie and have had no more problems...
     
    #7 Dukedesmo, Oct 28, 2014
  8. Header tank
     
    #8 bradders, Oct 28, 2014
    • Agree Agree x 1
  9. What bradders said
     
    #9 mcr998, Oct 28, 2014
  10. The mist on the screen is how I realized mine had split
     
    #10 rdw748, Oct 29, 2014
  11. A sprinkle of talcum powder should show where any fluid is leaking from. ;)
     
    #11 1037sps, Oct 29, 2014
  12. Works for fat birds
     
    #12 deleteduser211220, Oct 29, 2014
    • Funny Funny x 3
    • Agree Agree x 1
    • Useful Useful x 1
  13. Header tank...let me know if it is as have a few for sale.
     
    #13 Tommy B, Oct 29, 2014
  14. The header tank is the same as any 748/9*6 model only the sensor unit on the early bikes is not mounted on this model.
     
    #14 Red998, Oct 30, 2014
  15. Taste it
     
    #15 Mr C, Oct 30, 2014
    • Agree Agree x 1
  16. what Mr R & Mr C said !
     
    #16 SteveO916, Oct 30, 2014
  17. What Mr R, Mr C & SteveSteveO916 said! ;)
     
    #17 1037sps, Oct 30, 2014
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