Raid design vacuum fuel pump

Discussion in 'Crazy-Awesome almost Dakar racers (950/990cc)' started by SE Steve, Jan 31, 2013.

  1. SE Steve

    SE Steve Super Noob

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    So I finally got around to installing vacuum pump kit from raid deigns and it's leaking from the gaskets. looks like they get taken apart and vacuum side turned 90%. [​IMG]
    [​IMG]

    Anyone have any ideas on how to fix it.
    #1
  2. Qwik

    Qwik Adrenaline Addict

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    Call Raid Designs. They will make it good
    #2
  3. KTMbageera

    KTMbageera Adventurer

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    Is this a workable, reliable alternative to the OEM in the tank masterpiece? With this can we dump the in tank due filter headaches and go for external inline fuel filters?
    #3
  4. LocuL

    LocuL Gnarly Infantry

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    I think this only vvorks for the carbed bikes. To lovv pressure for the EFI.
    #4
  5. Qwik

    Qwik Adrenaline Addict

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    Carb'd bike pump only
    #5
  6. Hipster

    Hipster Long timer

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    That fuel pump looks vary similar to my 640 LC4 pump, which is a low pressure vacuum pump to feed the carb.
    #6
  7. SE Steve

    SE Steve Super Noob

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    Emailed Raid they sent a gasket set for the pump. Installed it still leaking. I just want to go for a ride
    #7
  8. DSM8

    DSM8 Where fun goes to die....

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    Be more specific where is it leaking from.
    The gasket between the two plates.
    From a bolt hole
    Petcock etc.

    Take a pic and point to where the leak is in the pic.

    If between the plates take them off and check to see if they are warped, use a glass plate to check this.

    The gasket should accommodate a small gap but too big and it could be a casting issue. Is the pump new or was it in use for a while before it leaked.

    See....need more details than "It leaks"
    #8
  9. PowerCell

    PowerCell Manufacture

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    I consider this pump to be undersized for the application...



    .
    #9
  10. SE Steve

    SE Steve Super Noob

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    Why do you say that ? Raid design says that this pump cures the flooding problem when in whoops and pumps enough for top speed.
    #10
  11. pdxmotorhead

    pdxmotorhead Long timer

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    Its about the same physical size as the same type of pump on a large outboard motor... Seems ok for a dual carb bike.. Surge volume might be a issue...

    I found on boats the rubber in these last 1 season.. Les if they are allowed to dry out...

    Dave
    #11
  12. jm65

    jm65 Been here awhile

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    #12
  13. Pete640

    Pete640 Long timer

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    Thought the woops issue was due to the CV carbs shutting down??? Not flooding???
    #13
  14. veetwo _tls

    veetwo _tls RENOVATIO:

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    i've had the pump on my SER for a good 12 mths or more & has been faultless :clap

    as for the pump leak make sure your hose clamps are tight Especially the infeed to the carbs off the pump. my first fire up with the vac pump leaked there & i thought the clamp was tight enough so a little more & was good. there some pressure there.


    gasket sets are cheap - i bought 3 sets when i got mine on ebay
    #14
  15. skuikka

    skuikka Adventurer

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    I believe this is similar 38liters/hourMikuni pump as I had in my SE. If the engine consumes less than 370 grams/kWh, which it should do on WOT, the pump Is big enough. Also my experience backs the theory. I used the bike also on racetrack with half a minute full throttle straight without any indications on going lean. I Agree there is not too much overflow, though I measured the pump flow to be approx 44L/h with crankcase vacuum. The pressure on the other hand was so high, that the engine Flooded on the motocross track, so I had to use a regulator.
    #15
  16. SE Steve

    SE Steve Super Noob

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    So I finally figured out the leaking problem. The pump is a dual outlet pump and the outlet pointing down was not sealed off good enough. Pulled the block off bolt put some sealant on it problem solved. Next problem forgot to turn off gas flooded cylinders. Fixed that. Next problem had a plastic fuel filter between tank and pump. It got to hot and the hose clamps closed off the filter so no gas. Need to find a metal filter.
    #16